/* ============================================
   VARIABLES & RESET
   ============================================ */
:root {
    --primary-color: #000000;
    --secondary-color: #ffffff;
    --accent-color: #333333;
    --text-color: #ffffff;
    --bg-color: #000000;
    --card-bg: #1a1a1a;
    --border-color: #333333;
    --success-color: #00ff00;
    --error-color: #ff0000;
    --warning-color: #ffff00;
    --shadow: 0 10px 40px rgba(255, 255, 255, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

#background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1; /* Place it behind all content */
    pointer-events: none; /* Never block clicks */
}

/* Ensure content is above background */
body > * {
    position: relative;
    z-index: 1;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    transition: var(--transition);
    pointer-events: auto !important;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   LOADING SCREEN
   ============================================ */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    animation: fadeOut 0.5s ease 2s forwards;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.code-symbol {
    font-size: 4rem;
    font-weight: bold;
    color: var(--text-color);
    animation: pulse 1.5s ease-in-out infinite;
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: var(--border-color);
    margin-top: 20px;
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.loading-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--text-color);
    animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
    0%, 100% { left: -100%; }
    50% { left: 100%; }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* ============================================
   UTILITIES
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-fluid {
    width: 100%;
    padding: 0 40px;
}

.hidden {
    display: none !important;
    pointer-events: none !important;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 20px;
    position: relative;
    display: block; /* Changed from inline-block */
    animation: titleFadeIn 1s ease-out;
}

@keyframes titleFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Gradient text animation for titles */
.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--success-color), transparent);
    animation: lineGrow 1.5s ease-out;
}

@keyframes lineGrow {
    from {
        width: 0;
    }
    to {
        width: 100px;
    }
}

/* Text shimmer effect for main headings */
h1, h2, .logo {
    background: linear-gradient(
        90deg,
        var(--text-color) 0%,
        var(--success-color) 50%,
        var(--text-color) 100%
    );
    background-size: 200% auto;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% {
        background-position: 200% center;
    }
    100% {
        background-position: -200% center;
    }
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #999;
    margin-bottom: 60px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 2px solid var(--text-color);
    cursor: pointer;
    z-index: 1;
    pointer-events: auto;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    pointer-events: none;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--text-color);
    color: var(--bg-color);
}

.btn-primary:hover {
    background: var(--bg-color);
    color: var(--text-color);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-color);
}

.btn-secondary:hover {
    background: var(--text-color);
    color: var(--bg-color);
}

.btn-block {
    width: 100%;
}

.btn-icon {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 10px;
}

.btn-icon:hover {
    background: var(--text-color);
    color: var(--bg-color);
    transform: translateX(5px);
}

.btn-icon-sm {
    padding: 6px 12px;
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.btn-icon-sm:hover {
    background: var(--text-color);
    color: var(--bg-color);
}

.pulse {
    animation: pulseBtn 2s infinite;
}

@keyframes pulseBtn {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7); }
    50% { box-shadow: 0 0 0 15px rgba(255, 255, 255, 0); }
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    animation: slideDown 0.5s ease;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand .logo {
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-code);
    color: var(--text-color);
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    position: relative;
    padding: 5px 0;
    color: var(--text-color);
    font-weight: 500;
    white-space: nowrap; /* Prevent text wrapping */
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--text-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    gap: 15px;
    align-items: center;
    z-index: 100;
    position: relative;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 15px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    white-space: nowrap; /* Prevent text wrapping */
    cursor: pointer;
    transition: var(--transition);
    z-index: 100;
    position: relative;
}

.user-profile:hover {
    background: var(--border-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.2);
}

.user-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--text-color);
    object-fit: cover; /* Ensure avatar images scale properly */
    flex-shrink: 0; /* Prevent avatar from shrinking */
    pointer-events: none;
}

.user-name {
    white-space: nowrap; /* Prevent username from wrapping */
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 150px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    transition: var(--transition);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 100px;
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

.particles::before,
.particles::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
}

.particles::before {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.particles::after {
    bottom: 10%;
    right: 10%;
    animation-delay: 5s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 4.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
}

.glitch {
    position: relative;
    animation: glitch 3s infinite;
}

@keyframes glitch {
    0%, 90%, 100% { transform: translate(0); }
    92% { transform: translate(-2px, 2px); }
    94% { transform: translate(2px, -2px); }
    96% { transform: translate(-2px, -2px); }
    98% { transform: translate(2px, 2px); }
}

.hero-subtitle {
    font-size: 1.3rem;
    color: #999;
    margin-bottom: 40px;
    line-height: 1.8;
}

/* Hero Title: smooth left-to-right slide, solid white color */
.hero-title-slide {
    color: #fff;
    background: none !important; /* override global shimmer gradient */
    -webkit-text-fill-color: #fff; /* ensure pure white on WebKit */
    background-clip: initial;
    -webkit-background-clip: initial;
    /* Initial reveal, then gentle continuous drift */
    animation: heroSlideIn 1.6s cubic-bezier(0.22, 0.61, 0.36, 1) both, heroSlideLoop 10s ease-in-out 1.6s infinite;
    will-change: transform, opacity;
}

@keyframes heroSlideIn {
    from {
        opacity: 0;
        transform: translateX(-80px);
    }
    60% {
        opacity: 1;
        transform: translateX(10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes heroSlideLoop {
    0% {
        transform: translateX(0);
    }
    50% {
        transform: translateX(18px);
    }
    100% {
        transform: translateX(0);
    }
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 50px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-color);
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-code {
    position: relative;
    animation: fadeInRight 1s ease;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.code-window {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.code-header {
    background: var(--accent-color);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    border-bottom: 1px solid var(--border-color);
}

.dots {
    display: flex;
    gap: 8px;
}

.dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1px solid var(--text-color);
}

.code-title {
    font-family: var(--font-code);
    font-size: 0.9rem;
    color: #999;
}

.code-body {
    padding: 30px;
}

.code-body pre {
    margin: 0;
    font-family: var(--font-code);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ============================================
   COURSES SECTION
   ============================================ */
.courses {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-color) 0%, #0a0a0a 100%);
}

.course-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    transition: var(--transition);
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--text-color);
    color: var(--bg-color);
    transform: translateY(-2px);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.course-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out backwards;
}

/* Stagger animation for course cards */
.course-card:nth-child(1) { animation-delay: 0.1s; }
.course-card:nth-child(2) { animation-delay: 0.2s; }
.course-card:nth-child(3) { animation-delay: 0.3s; }
.course-card:nth-child(4) { animation-delay: 0.4s; }
.course-card:nth-child(5) { animation-delay: 0.5s; }
.course-card:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--text-color);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.course-card:hover::before {
    transform: scaleX(1);
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 60px rgba(255, 255, 255, 0.15);
}

.course-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: inline-block;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.course-card:hover .course-icon {
    animation: spin 0.6s ease-in-out;
}

@keyframes spin {
    from {
        transform: rotate(0deg) scale(1);
    }
    50% {
        transform: rotate(180deg) scale(1.2);
    }
    to {
        transform: rotate(360deg) scale(1);
    }
}

.course-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.course-description {
    color: #999;
    margin-bottom: 20px;
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.course-level {
    padding: 5px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.level-beginner {
    background: rgba(0, 255, 0, 0.1);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.level-intermediate {
    background: rgba(255, 255, 0, 0.1);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.level-advanced {
    background: rgba(255, 0, 0, 0.1);
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

.course-duration {
    color: #666;
    font-size: 0.9rem;
}

/* ============================================
   EDITOR SECTION
   ============================================ */
.editor-section {
    padding: 100px 0;
    background: var(--bg-color);
}

.editor-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    min-height: 700px;
}

.editor-sidebar {
    background: #0f0f0f;
    padding: 20px;
    border-right: 1px solid var(--border-color);
}

.language-select {
    margin-bottom: 30px;
}

.language-select label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    font-size: 0.9rem;
}

.editor-lang-select {
    width: 100%;
    padding: 10px;
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

.code-helper {
    margin-bottom: 30px;
}

.code-helper h3 {
    font-size: 1rem;
    margin-bottom: 15px;
    color: #999;
}

.helper-commands {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.helper-command {
    padding: 8px 12px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: var(--font-code);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}

.helper-command:hover {
    background: var(--text-color);
    color: var(--bg-color);
    transform: translateX(5px);
}

.editor-actions {
    display: flex;
    flex-direction: column;
}

.editor-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.code-editor {
    position: relative;
    border-right: 1px solid var(--border-color);
}

.editor-header {
    background: var(--accent-color);
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.editor-file-name {
    font-family: var(--font-code);
    font-size: 0.9rem;
}

.editor-lang-badge {
    padding: 4px 10px;
    background: var(--text-color);
    color: var(--bg-color);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.code-textarea {
    width: 100%;
    height: calc(100% - 50px);
    padding: 20px;
    padding-left: 60px;
    background: var(--card-bg);
    color: var(--text-color);
    border: none;
    outline: none;
    font-family: var(--font-code);
    font-size: 0.95rem;
    line-height: 1.6;
    resize: none;
    tab-size: 4;
}

.line-numbers {
    position: absolute;
    top: 50px;
    left: 0;
    width: 50px;
    padding: 20px 10px;
    background: #0a0a0a;
    color: #666;
    font-family: var(--font-code);
    font-size: 0.9rem;
    line-height: 1.6;
    text-align: right;
    border-right: 1px solid var(--border-color);
    user-select: none;
}

.code-output {
    display: flex;
    flex-direction: column;
}

.output-header {
    background: var(--accent-color);
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.output-frame {
    flex: 1;
    width: 100%;
    border: none;
    background: white;
}

.console-output {
    background: #0a0a0a;
    color: var(--success-color);
    font-family: var(--font-code);
    font-size: 0.9rem;
    padding: 20px;
    min-height: 100px;
    max-height: 300px;
    overflow-y: auto;
    border-top: 1px solid var(--border-color);
}

/* ============================================
   PRACTICE SECTION
   ============================================ */
.practice {
    padding: 100px 0;
    background: linear-gradient(180deg, #0a0a0a 0%, var(--bg-color) 100%);
}

/* ============================================
   CODE GAME SECTION
   ============================================ */
.code-game {
    padding: 100px 0;
    background: var(--bg-color);
}

.code-game-layout {
    display: grid;
    grid-template-columns: 520px 1fr;
    gap: 30px;
    align-items: start;
}

#robotCanvas {
    width: 100%;
    height: auto;
    background: #0a0a0a;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.code-game-panel {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.code-game-panel.flash {
    animation: panelFlash 0.8s ease;
}

@keyframes panelFlash {
    0% { box-shadow: 0 0 0 rgba(0,255,0,0); border-color: var(--border-color); }
    30% { box-shadow: 0 0 30px rgba(0,255,0,0.5); border-color: #00ff00; }
    100% { box-shadow: 0 0 0 rgba(0,255,0,0); border-color: var(--border-color); }
}

.game-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    color: #ccc;
    font-size: 0.95rem;
}

.game-stats i { color: var(--success-color); margin-right: 6px; }

.game-objective {
    margin: 8px 0 14px;
    padding: 8px 12px;
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    background: rgba(255,255,255,0.03);
    color: #bbb;
    font-size: 0.95rem;
}

.code-game-textarea {
    width: 100%;
    min-height: 220px;
    padding: 12px;
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-code);
    font-size: 0.95rem;
    line-height: 1.6;
    resize: vertical;
}

.game-buttons {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.game-help {
    margin-top: 16px;
    color: #999;
}

.game-help code {
    background: rgba(255,255,255,0.06);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

@media (max-width: 992px) {
    .code-game-layout {
        grid-template-columns: 1fr;
    }
}

.practice-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
}

.challenges-list {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    max-height: 800px;
    overflow-y: auto;
}

.challenges-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.challenges-header h3 {
    font-size: 1.3rem;
}

.difficulty-filter {
    padding: 6px 12px;
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.85rem;
}

.challenges-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.challenge-item {
    padding: 20px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.challenge-item:hover {
    border-color: var(--text-color);
    transform: translateX(5px);
}

.challenge-item-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.challenge-item-meta {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    color: #666;
}

.challenge-workspace {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
}

.challenge-info {
    margin-bottom: 25px;
}

.challenge-info h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.challenge-info p {
    color: #999;
    line-height: 1.8;
}

.challenge-hints {
    margin-top: 20px;
}

.btn-hint {
    padding: 8px 16px;
    background: transparent;
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-hint:hover {
    background: var(--warning-color);
    color: var(--bg-color);
}

.challenge-editor {
    margin-bottom: 25px;
}

.challenge-editor .code-textarea {
    height: 300px;
    padding-left: 20px;
}

.challenge-actions {
    display: flex;
    gap: 15px;
}

.challenge-result {
    margin-top: 25px;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.challenge-result.success {
    background: rgba(0, 255, 0, 0.1);
    border-color: var(--success-color);
    color: var(--success-color);
}

.challenge-result.error {
    background: rgba(255, 0, 0, 0.1);
    border-color: var(--error-color);
    color: var(--error-color);
}

.challenge-language-info,
.task-requirement {
    margin: 10px 0;
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 5px;
    font-size: 14px;
    line-height: 1.6;
}

.challenge-language-info strong,
.task-requirement strong {
    display: inline-block;
    margin-right: 5px;
}

/* ============================================
   ACHIEVEMENTS SECTION
   ============================================ */
.achievements {
    padding: 100px 0;
    background: var(--bg-color);
}

.progress-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.progress-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
}

.progress-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.progress-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: var(--text-color);
    color: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.progress-info h3 {
    font-size: 0.9rem;
    color: #666;
    text-transform: uppercase;
    margin-bottom: 5px;
}

.progress-value {
    font-size: 2rem;
    font-weight: 800;
}

.level-progress {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 50px;
}

.level-bar {
    width: 100%;
    height: 20px;
    background: var(--bg-color);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 10px;
}

.level-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--text-color), #666);
    transition: width 0.5s ease;
    border-radius: 10px;
}

.level-text {
    text-align: center;
    color: #999;
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 20px;
}

.badge {
    aspect-ratio: 1;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px;
    transition: var(--transition);
    cursor: pointer;
}

.badge:hover {
    transform: scale(1.05);
    border-color: var(--text-color);
}

.badge.locked {
    opacity: 0.3;
    cursor: not-allowed;
}

.badge-icon {
    font-size: 2.5rem;
}

.badge-name {
    font-size: 0.8rem;
    text-align: center;
    font-weight: 600;
}

/* ============================================
   MODAL
   ============================================ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.modal.hidden {
    pointer-events: none;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    max-width: 450px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.modal-close:hover {
    background: var(--text-color);
    color: var(--bg-color);
    transform: rotate(90deg);
}

.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: 12px;
    background: transparent;
    color: #666;
    border: none;
    border-bottom: 2px solid transparent;
    font-weight: 600;
    transition: var(--transition);
}

.auth-tab.active {
    color: var(--text-color);
    border-bottom-color: var(--text-color);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-form h2 {
    text-align: center;
    margin-bottom: 30px;
}

.form-group {
    position: relative;
    margin-bottom: 25px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--text-color);
}

.form-group label {
    position: absolute;
    left: 16px;
    top: 14px;
    color: #666;
    transition: var(--transition);
    pointer-events: none;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label {
    top: -10px;
    left: 12px;
    font-size: 0.8rem;
    background: var(--card-bg);
    padding: 0 5px;
    color: var(--text-color);
}

/* ============================================
   TOAST NOTIFICATION
   ============================================ */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow);
    z-index: 3000;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ============================================
   PROFILE EDIT MODAL
   ============================================ */
.profile-modal-content {
    max-width: 800px; /* Increased width */
    padding: 0; /* Remove padding to allow full-width header */
    max-height: 90vh;
    overflow-y: auto;
}

.profile-edit-container {
    padding: 40px;
}

.profile-header {
    padding: 40px;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.profile-edit-container h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.profile-tabs {
    display: flex;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.profile-tab {
    flex: 1;
    padding: 15px;
    background: transparent;
    color: #888;
    font-weight: 600;
    border: none;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}

.profile-tab.active, .profile-tab:hover {
    color: var(--text-color);
    border-bottom-color: var(--success-color);
}

.profile-tab i {
    margin-right: 8px;
}

.profile-tab-content {
    display: none;
    padding: 30px;
    animation: fadeIn 0.5s;
}

.profile-tab-content.active {
    display: block;
}

.code-snippet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.code-snippet-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    cursor: pointer;
    transition: var(--transition);
}

.code-snippet-card:hover {
    transform: translateY(-5px);
    border-color: var(--success-color);
}

.code-snippet-card h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.code-snippet-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #888;
}

.code-snippet-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.profile-edit-container h2 i {
    color: var(--success-color);
}

.avatar-upload-section {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px;
    background: var(--bg-color);
    border-radius: 12px;
    border: 2px dashed var(--border-color);
}

.avatar-preview-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    margin-bottom: 20px;
}

.avatar-preview {
    position: relative;
    width: 150px;
    height: 150px;
    border-radius: 12px;
    overflow: hidden;
    background: var(--card-bg);
    border: 3px solid var(--border-color);
    transition: var(--transition);
}

.avatar-preview:hover {
    border-color: var(--success-color);
    transform: scale(1.05);
}

.avatar-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.avatar-preview:hover .avatar-overlay {
    opacity: 1;
}

.avatar-overlay i {
    font-size: 2rem;
    color: var(--success-color);
}

.avatar-preview-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--card-bg);
    border: 4px solid var(--success-color);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.3);
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 255, 0, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 255, 0, 0.6);
    }
}

.avatar-preview-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-info {
    color: #666;
    font-size: 0.9rem;
    margin-top: 10px;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin: 30px 0;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 12px;
}

.stat-item {
    text-align: center;
    padding: 15px;
    background: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-item i {
    font-size: 1.5rem;
    color: var(--success-color);
    margin-bottom: 8px;
    display: block;
}

.stat-item span {
    font-weight: 600;
    font-size: 0.95rem;
}

.profile-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.profile-actions button {
    flex: 1;
    padding: 14px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
}

.profile-logout-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.btn-logout {
    width: 100%;
    padding: 14px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    background: rgba(220, 38, 38, 0.1);
    color: #dc2626;
    border: 1px solid #dc2626;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    background: #dc2626;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(220, 38, 38, 0.3);
}

.btn-logout i {
    margin-right: 8px;
}

.toast i {
    font-size: 1.2rem;
    color: var(--success-color);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
}

.footer-section p {
    color: #999;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #999;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--text-color);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--text-color);
    color: var(--bg-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: #666;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
    padding: 100px 0;
    background: var(--bg-color);
}

.contact-form {
    max-width: 760px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.contact-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 768px) {
    .contact-form .form-row { grid-template-columns: 1fr; }
}

/* Override floating labels used elsewhere to avoid text overlap */
.contact-form .form-group {
    margin-bottom: 16px;
}

.contact-form .form-group label {
    position: static !important;
    display: block;
    margin-bottom: 8px;
    color: #bbb;
    font-weight: 600;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

.contact-form textarea { resize: vertical; min-height: 160px; }

.contact-form .form-note {
    color: #777;
    font-size: 0.9rem;
    margin-top: 10px;
}

.contact-success {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
    color: var(--success-color);
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-color);
}

/* ============================================
   COURSE MODAL
   ============================================ */
.course-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease;
    overflow-y: auto;
    padding: 20px;
}

.course-modal.hidden {
    pointer-events: none;
}

.course-modal-content {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideInUp 0.4s ease;
}

.course-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 2rem;
    color: var(--text-color);
    background: transparent;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
    z-index: 10;
}

.course-modal-close:hover {
    background: var(--border-color);
    transform: rotate(90deg);
}

.course-modal-header {
    padding: 40px;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 30px;
}

.course-modal-icon {
    font-size: 5rem;
    min-width: 100px;
    text-align: center;
}

.course-modal-title-section h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.course-modal-rating {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #999;
}

.course-modal-rating .stars {
    color: #ffd700;
    font-size: 1.2rem;
}

.course-modal-body {
    padding: 40px;
}

.course-modal-section {
    margin-bottom: 40px;
}

.course-modal-section h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.learning-outcomes {
    list-style: none;
    display: grid;
    gap: 12px;
}

.learning-outcomes li {
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--success-color);
    border-radius: 8px;
    font-size: 1.05rem;
}

.syllabus {
    display: grid;
    gap: 15px;
}

.syllabus-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition);
}

.syllabus-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(5px);
}

.syllabus-number {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-color);
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--border-color);
    border-radius: 50%;
}

.syllabus-text {
    flex: 1;
}

.course-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.detail-item i {
    font-size: 1.5rem;
    color: var(--text-color);
}

.course-modal-footer {
    padding: 30px 40px;
    border-top: 2px solid var(--border-color);
    text-align: center;
}

/* ============================================
   PLAYGROUND SECTION
   ============================================ */
.playground {
    padding: 100px 0;
    text-align: center;
}

#animation-container {
    width: 100%;
    height: 300px;
    margin: 0 auto 40px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    background: #0a0a0a;
}

.playground-controls {
    margin: 16px 0 32px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
}

.controls-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 16px;
    align-items: center;
    margin-bottom: 10px;
}

.controls-row label {
    color: #bbb;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.controls-row select,
.controls-row input[type="range"] {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 8px;
}

.controls-row input[type="range"] {
    width: 160px;
    accent-color: var(--text-color);
}

.control-value {
    min-width: 48px;
    color: #aaa;
}

.toggle-label input {
    transform: translateY(1px);
}

.btn-sm {
    padding: 6px 10px;
    font-size: 0.85rem;
    border-radius: 6px;
}

@media (max-width: 576px) {
    .controls-row { flex-direction: column; align-items: flex-start; }
    .controls-row input[type="range"] { width: 100%; }
}

.coding-tip {
    max-width: 700px;
    margin: 0 auto;
    padding: 30px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
}

.coding-tip h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--success-color);
}

#codingTipText {
    font-size: 1.1rem;
    color: #ccc;
    min-height: 60px;
    margin-bottom: 20px;
    transition: opacity 0.3s ease-in-out;
}

#newTipBtn {
    border-color: var(--border-color);
}

.btn-lg {
    padding: 18px 50px;
    font-size: 1.2rem;
    border-radius: 12px;
}


/* Course card improvements */
/* Course card improvements */
.course-description-full {
    color: #999;
    margin: 10px 0;
    font-size: 1.1rem;
}

.course-modal-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 15px;
}

.course-modal-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #999;
}

.badge {
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-beginner {
    background: rgba(0, 255, 0, 0.2);
    color: var(--success-color);
}

.badge-intermediate {
    background: rgba(255, 255, 0, 0.2);
    color: var(--warning-color);
}

.badge-advanced {
    background: rgba(255, 0, 0, 0.2);
    color: var(--error-color);
}

/* Course progress section */
.course-progress-section {
    margin-bottom: 30px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    border: 1px solid var(--border-color);
}

.progress-bar-container {
    width: 100%;
    height: 30px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    overflow: hidden;
    margin: 15px 0;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success-color), #00cc00);
    transition: width 0.5s ease;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 10px;
    font-weight: bold;
}

.progress-text {
    text-align: center;
    font-size: 1.1rem;
    color: #999;
    margin-top: 10px;
}

/* Daily tasks section */
.daily-tasks-section {
    margin-top: 30px;
}

.daily-tasks-section h3 {
    margin-bottom: 20px;
}

.daily-tasks-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.daily-task-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition);
}

.daily-task-item.current {
    border-color: var(--text-color);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.daily-task-item.completed {
    border-color: var(--success-color);
    background: rgba(0, 255, 0, 0.05);
    opacity: 0.7;
}

.daily-task-item.locked {
    opacity: 0.4;
    cursor: not-allowed;
}

.task-day {
    font-size: 1.2rem;
    font-weight: bold;
    min-width: 120px;
    color: var(--text-color);
}

.task-content {
    flex: 1;
}

.task-content h4 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.task-content p {
    color: #999;
    margin-bottom: 5px;
}

.task-objective {
    display: block;
    margin-top: 10px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.3);
    border-left: 3px solid var(--text-color);
    border-radius: 4px;
    font-style: italic;
}

.btn-task {
    padding: 10px 20px;
    background: var(--text-color);
    color: var(--bg-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.btn-task:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.3);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.more-tasks {
    text-align: center;
    color: #666;
    margin-top: 15px;
    font-style: italic;
}

/* Course preview section */
.course-preview-section {
    padding: 20px;
}

.course-preview-section h3 {
    margin-bottom: 15px;
}

.course-preview-section p {
    margin: 10px 0;
    line-height: 1.8;
    color: #999;
}

.course-features {
    list-style: none;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    margin: 20px 0;
}

.course-features li {
    padding: 10px 0;
    font-size: 1.1rem;
}

.sample-tasks {
    margin-top: 30px;
}

.sample-tasks h4 {
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.task-preview-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.task-preview-item {
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--text-color);
    border-radius: 8px;
}

.task-preview-item strong {
    color: var(--text-color);
    display: block;
    margin-bottom: 5px;
}

.task-preview-item p {
    color: #999;
    font-size: 0.9rem;
    margin: 5px 0 0 0;
}

.course-instructor {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 15px 0;
    padding: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.course-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: #666;
}

.course-stats span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.course-view-btn {
    width: 100%;
    padding: 12px;
    background: var(--text-color);
    color: var(--bg-color);
    border: 2px solid var(--text-color);
    border-radius: 8px;
    font-weight: 600;
    margin-top: 15px;
    transition: var(--transition);
}

.course-view-btn:hover {
    background: transparent;
    color: var(--text-color);
    transform: translateY(-2px);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ============================================
   TASK MODAL
   ============================================ */
.task-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
    overflow-y: auto;
    padding: 20px;
}

.task-modal.hidden {
    pointer-events: none;
}

.task-modal-content {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: slideInUp 0.4s ease;
}

.task-modal-header {
    padding: 30px 40px;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 20px;
}

.task-day-badge {
    font-size: 2rem;
    font-weight: bold;
    padding: 15px 25px;
    background: var(--text-color);
    color: var(--bg-color);
    border-radius: 12px;
    min-width: 100px;
    text-align: center;
}

.task-modal-header h2 {
    font-size: 2rem;
    flex: 1;
}

.task-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 2rem;
    color: var(--text-color);
    background: transparent;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
    z-index: 10;
}

.task-modal-close:hover {
    background: var(--border-color);
    transform: rotate(90deg);
}

.task-modal-body {
    padding: 40px;
}

.task-section {
    margin-bottom: 30px;
}

.task-section h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.task-section p {
    color: #999;
    line-height: 1.8;
    font-size: 1.1rem;
}

.task-objective-box {
    padding: 20px;
    background: rgba(0, 255, 0, 0.1);
    border: 2px solid var(--success-color);
    border-radius: 12px;
    margin-top: 15px;
}

.task-objective-box p {
    color: var(--success-color);
    font-weight: 600;
    font-size: 1.1rem;
}

.task-workspace {
    padding: 25px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
}

.task-workspace p {
    margin-bottom: 15px;
}

.task-tips {
    padding: 20px;
    background: rgba(255, 255, 0, 0.1);
    border: 1px solid var(--warning-color);
    border-radius: 12px;
}

.task-tips ul {
    list-style: none;
    padding-left: 0;
}

.task-tips li {
    padding: 10px 0;
    color: #ccc;
    font-size: 1rem;
    line-height: 1.6;
}

.task-tips li::before {
    content: "💡 ";
    margin-right: 8px;
}

.task-modal-footer {
    padding: 25px 40px;
    border-top: 2px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.btn-outline {
    padding: 14px 30px;
    background: transparent;
    color: var(--text-color);
    border: 2px solid var(--text-color);
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    background: var(--text-color);
    color: var(--bg-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.3);
}

.btn-success {
    padding: 14px 30px;
    background: var(--success-color);
    color: var(--bg-color);
    border: 2px solid var(--success-color);
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-success:hover {
    background: transparent;
    color: var(--success-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 255, 0, 0.3);
}

.task-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* ============================================
   COURSE VIEW PAGE
   ============================================ */
.course-view-section {
    min-height: 100vh;
    padding: 120px 0 80px;
    background: linear-gradient(180deg, var(--bg-color) 0%, #0a0a0a 50%, var(--bg-color) 100%);
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 30px;
    transition: var(--transition);
}

.btn-back:hover {
    background: var(--text-color);
    color: var(--bg-color);
    transform: translateX(-5px);
}

.course-view-header {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
    animation: slideInUp 0.5s ease;
}

.course-header-content {
    display: flex;
    align-items: center;
    gap: 30px;
}

.course-header-icon {
    font-size: 5rem;
    min-width: 100px;
    text-align: center;
    animation: pulse 2s infinite;
}

.course-header-info h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.course-header-meta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.course-header-meta span {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #999;
    font-size: 1rem;
}

/* Today's Task Container */
.today-task-container {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
    animation: slideInUp 0.6s ease;
}

.today-task-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.today-task-header h2 {
    font-size: 2rem;
    display: flex;
    align-items: center;
    gap: 15px;
}

.task-day-info {
    font-size: 1.2rem;
    color: #999;
    font-weight: 600;
}

.today-task-card {
    position: relative;
}

.task-difficulty {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 0, 0.2);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.today-task-card h3 {
    font-size: 2rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.task-description-container {
    margin-bottom: 30px;
}

.task-description-container .task-desc {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #ccc;
    margin-top: 15px;
}

/* Theory Section Styles */
.theory-section {
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 30px;
    margin: 25px 0;
}

.theory-section h3 {
    font-size: 1.8rem;
    color: var(--text-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.theory-section h4 {
    font-size: 1.4rem;
    color: var(--text-color);
    margin-top: 25px;
    margin-bottom: 15px;
    border-left: 4px solid var(--text-color);
    padding-left: 15px;
}

.theory-section p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #ccc;
    margin-bottom: 15px;
}

.theory-section ul {
    list-style: none;
    padding-left: 0;
    margin: 15px 0;
}

.theory-section ul li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    color: #ccc;
    font-size: 1.05rem;
    line-height: 1.6;
}

.theory-section ul li::before {
    content: "▸";
    position: absolute;
    left: 10px;
    color: var(--success-color);
    font-weight: bold;
}

.theory-section pre {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
    margin: 15px 0;
}

.theory-section code {
    font-family: var(--font-code);
    font-size: 0.95rem;
    line-height: 1.6;
    color: #00ff00;
}

.theory-section strong {
    color: var(--text-color);
    font-weight: 700;
}

.today-task-card > p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #ccc;
    margin-bottom: 30px;
}

.task-objective-section {
    background: rgba(0, 255, 0, 0.1);
    border: 2px solid var(--success-color);
    border-radius: 15px;
    padding: 25px;
    margin: 30px 0;
}

.task-objective-section h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--success-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.task-objective-section p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #ccc;
}

.task-instructions {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 25px;
    margin: 30px 0;
}

.task-instructions h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.task-instructions ol {
    padding-left: 25px;
    color: #ccc;
}

.task-instructions li {
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 12px;
    padding-left: 10px;
}

.task-hints-section {
    margin: 30px 0;
}

.btn-show-hints {
    padding: 12px 24px;
    background: rgba(255, 255, 0, 0.1);
    color: var(--warning-color);
    border: 2px solid var(--warning-color);
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-show-hints:hover {
    background: var(--warning-color);
    color: var(--bg-color);
}

.task-hints {
    background: rgba(255, 255, 0, 0.05);
    border: 1px solid var(--warning-color);
    border-radius: 12px;
    padding: 20px;
    margin-top: 15px;
}

.task-hints ul {
    list-style: none;
    padding: 0;
}

.task-hints li {
    padding: 10px 0;
    font-size: 1rem;
    color: #ccc;
    line-height: 1.6;
}

.task-actions-section {
    display: flex;
    gap: 20px;
    margin: 30px 0;
    flex-wrap: wrap;
}

.btn-editor {
    flex: 1;
    padding: 18px 30px;
    background: var(--text-color);
    color: var(--bg-color);
    border: 2px solid var(--text-color);
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: var(--transition);
}

.btn-editor:hover {
    background: transparent;
    color: var(--text-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.2);
}

.btn-complete-task {
    flex: 1;
    padding: 18px 30px;
    background: var(--success-color);
    color: var(--bg-color);
    border: 2px solid var(--success-color);
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: var(--transition);
}

.btn-complete-task:hover {
    background: transparent;
    color: var(--success-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 255, 0, 0.2);
}

.task-progress-info {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    margin-top: 20px;
}

.task-progress-info p {
    font-size: 1.1rem;
    color: #999;
}

.task-progress-info strong {
    color: var(--success-color);
    font-size: 1.3rem;
}

/* Course Timeline */
.course-timeline {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
    animation: slideInUp 0.7s ease;
}

.course-timeline h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.timeline-progress-bar {
    width: 100%;
    height: 30px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
}

.timeline-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success-color), #00cc00);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 15px;
    font-weight: bold;
    font-size: 0.9rem;
    transition: width 0.5s ease;
}

.timeline-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
}

.timeline-item {
    padding: 20px 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.timeline-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.1);
}

.timeline-item.completed {
    background: rgba(0, 255, 0, 0.1);
    border-color: var(--success-color);
}

.timeline-item.completed .timeline-status {
    color: var(--success-color);
}

.timeline-item.current {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--text-color);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.timeline-item.current .timeline-status {
    color: var(--text-color);
    animation: pulse 1.5s infinite;
}

.timeline-item.locked {
    opacity: 0.4;
    cursor: not-allowed;
}

.timeline-item.locked:hover {
    transform: none;
    box-shadow: none;
}

.timeline-day-number {
    font-weight: 700;
    font-size: 0.9rem;
    color: #999;
    margin-bottom: 8px;
}

.timeline-status {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.timeline-title {
    font-size: 0.85rem;
    color: #ccc;
    line-height: 1.3;
}

/* My Courses Section */
.my-courses-section {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    animation: slideInUp 0.8s ease;
}

.my-courses-section h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.my-courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
}

.no-courses-message {
    text-align: center;
    color: #999;
    font-size: 1.1rem;
    padding: 40px;
}

.my-course-card {
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: 15px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.my-course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.15);
    border-color: var(--text-color);
}

.my-course-card.active-course {
    border-color: var(--success-color);
    background: rgba(0, 255, 0, 0.05);
}

.my-course-icon {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 15px;
}

.my-course-card h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    text-align: center;
}

.my-course-progress {
    margin-top: 15px;
}

.progress-bar-mini {
    width: 100%;
    height: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar-fill-mini {
    height: 100%;
    background: linear-gradient(90deg, var(--success-color), #00cc00);
    transition: width 0.5s ease;
}

.progress-text {
    font-size: 0.85rem;
    color: #999;
    text-align: center;
    display: block;
}

.active-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 5px 12px;
    background: var(--success-color);
    color: var(--bg-color);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* ============================================
   CHALLENGE RESULTS STYLING
   ============================================ */
.challenge-result {
    margin-top: 20px;
    padding: 25px;
    border-radius: 12px;
    border: 2px solid;
    animation: slideInUp 0.4s ease;
}

.challenge-result.success {
    background: rgba(0, 255, 0, 0.1);
    border-color: var(--success-color);
}

.challenge-result.error {
    background: rgba(255, 0, 0, 0.1);
    border-color: var(--error-color);
}

.challenge-result h4 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.challenge-result h5 {
    font-size: 1.2rem;
    margin: 20px 0 10px 0;
}

.test-summary {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 10px 0;
}

.execution-time {
    color: #999;
    font-size: 0.9rem;
}

.success-details,
.error-details {
    margin-top: 20px;
}

.test-case-passed,
.test-case-failed {
    margin: 15px 0;
    padding: 15px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
}

.test-case-passed {
    border-left: 4px solid var(--success-color);
}

.test-case-failed {
    border-left: 4px solid var(--error-color);
}

.test-info {
    margin-top: 10px;
    padding-left: 20px;
}

.test-info > div {
    margin: 8px 0;
    padding: 8px;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.3);
}

.test-input {
    border-left: 3px solid #3498db;
}

.test-expected {
    border-left: 3px solid var(--success-color);
}

.test-actual {
    border-left: 3px solid var(--error-color);
}

.test-explanation {
    border-left: 3px solid var(--warning-color);
    background: rgba(255, 255, 0, 0.1) !important;
}

.hint-section {
    margin-top: 20px;
    padding: 15px;
    background: rgba(255, 255, 0, 0.1);
    border-left: 4px solid var(--warning-color);
    border-radius: 8px;
}

.common-errors {
    margin-top: 20px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.common-errors ul {
    margin-top: 10px;
    padding-left: 20px;
}

.common-errors li {
    margin: 8px 0;
    line-height: 1.6;
}

.error-details details {
    margin-top: 15px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 4px;
}

.error-details summary {
    cursor: pointer;
    font-weight: 600;
    padding: 5px;
}

.error-details summary:hover {
    color: var(--text-color);
}

.error-details pre {
    margin-top: 10px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 4px;
    overflow-x: auto;
    font-family: var(--font-code);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 3rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .editor-container {
        grid-template-columns: 1fr;
    }
    
    .editor-main {
        grid-template-columns: 1fr;
    }
    
    .practice-container {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
}

@media (max-width: 600px) {
    .section-title {
        font-size: 2rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
}