/* lessons.css - Complete with Results Page Style Dark Theme */
/* FIXED - Dark theme properly working */

/* ================= CSS VARIABLES ================= */
:root {
    /* Light Theme (Default) - Exactly like results page */
    --bg-primary: #f5f8ff;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-sidebar: #ffffff;
    --bg-main: #ffffff;
    --bg-right: #ffffff;
    
    --text-primary: #1e2b3c;
    --text-secondary: #3a4b62;
    --text-muted: #6b7a8f;
    --text-inverse: #ffffff;
    
    --border-color: #d9e2ef;
    --border-strong: #a0b8d4;
    --border-focus: #2b6ed9;
    
    --accent-primary: #2b6ed9;
    --accent-secondary: #1e4b8c;
    --accent-light: #e8f0fe;
    --accent-hover: #4895ef;
    --accent-transparent: rgba(43, 110, 217, 0.1);
    
    --accent-success: #28a745;
    --accent-warning: #ffc107;
    --accent-danger: #dc3545;
    --accent-info: #17a2b8;
    
    --shadow-color: rgba(0, 40, 100, 0.08);
    --shadow-hover: rgba(43, 110, 217, 0.15);
    --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    
    /* Lesson specific colors */
    --lesson-primary: #2b6ed9;
    --lesson-success: #28a745;
    --lesson-warning: #ffc107;
    --lesson-danger: #dc3545;
    --lesson-bg: #f5f8ff;
    --lesson-card-bg: #ffffff;
    --lesson-hover: #e8f0fe;
    
    /* Transition */
    --transition-speed: 0.3s;
}

/* ================= DARK THEME VARIABLES - Exactly like results page ================= */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-sidebar: #1e293b;
    --bg-main: #1e293b;
    --bg-right: #1e293b;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-inverse: #0f172a;
    
    --border-color: #334155;
    --border-strong: #475569;
    --border-focus: #3b82f6;
    
    --accent-primary: #3b82f6;
    --accent-secondary: #60a5fa;
    --accent-light: #1e293b;
    --accent-hover: #2563eb;
    --accent-transparent: rgba(59, 130, 246, 0.15);
    
    --accent-success: #4ade80;
    --accent-warning: #fbbf24;
    --accent-danger: #f87171;
    --accent-info: #38bdf8;
    
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(59, 130, 246, 0.2);
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    
    /* Lesson specific colors for dark mode */
    --lesson-primary: #3b82f6;
    --lesson-success: #4ade80;
    --lesson-warning: #fbbf24;
    --lesson-danger: #f87171;
    --lesson-bg: #0f172a;
    --lesson-card-bg: #1e293b;
    --lesson-hover: #2d3b4f;
}

/* ================= RESET & BASE ================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    transition: background-color var(--transition-speed) ease, 
                color var(--transition-speed) ease,
                border-color var(--transition-speed) ease;
}

/* ================= DARK MODE TOGGLE ================= */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-btn {
    background: var(--bg-card);
    border: 2px solid var(--border-strong);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
    box-shadow: var(--card-shadow);
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-btn:hover {
    transform: scale(1.05);
    border-color: var(--accent-primary);
    box-shadow: 0 8px 20px var(--shadow-hover);
}

/* ================= MAIN LAYOUT ================= */
.lessons-page {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    background: var(--bg-primary);
    min-height: 100vh;
    width: 100%;
    overflow-x: hidden;
}

/* Header */
.lessons-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0 20px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 25px;
    background: var(--bg-primary);
    transition: border-color var(--transition-speed) ease;
    width: 100%;
}

.site-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    cursor: pointer;
    letter-spacing: -0.5px;
    transition: color var(--transition-speed) ease;
    white-space: nowrap;
    overflow: visible;
    text-overflow: clip;
    max-width: none;
    flex-shrink: 0;
}

.site-title:hover {
    color: var(--accent-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.login-btn {
    background: transparent;
    border: 2px solid var(--border-strong);
    color: var(--text-primary);
    padding: 8px 28px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    white-space: nowrap;
}

.login-btn:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.mobile-menu-btn {
    display: none;
    background: var(--accent-primary);
    color: white;
    border: none;
    padding: 8px 15px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    font-weight: 600;
    white-space: nowrap;
    order: 1;
}

/* ================= 3-COLUMN LAYOUT ================= */
.lessons-layout {
    display: grid;
    grid-template-columns: 260px 1fr 280px;
    gap: 25px;
    margin-bottom: 40px;
}

/* ================= LEFT SIDEBAR ================= */
.lessons-sidebar {
    background: var(--bg-sidebar);
    border: 2px solid var(--border-color);
    border-radius: 24px;
    padding: 20px 15px;
    transition: all var(--transition-speed) ease;
    box-shadow: var(--card-shadow);
    height: fit-content;
    position: sticky;
    top: 20px;
}

.lessons-sidebar:hover {
    border-color: var(--accent-primary);
    transform: scale(1.02);
    box-shadow: 0 8px 25px var(--shadow-hover);
}

.nav-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
    transition: border-color var(--transition-speed) ease;
}

/* Navigation Menu */
.lessons-nav ul {
    list-style: none;
}

.lessons-nav li {
    margin-bottom: 5px;
}

.lessons-nav a {
    display: block;
    padding: 12px 15px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 500;
    transition: all var(--transition-speed) ease;
}

/* Home link styling */
.home-icon {
    margin-right: 8px;
}

/* Active state with transparent background */
.lessons-nav li.active a {
    background: var(--accent-transparent);
    color: var(--accent-primary);
    transform: translateX(5px);
    font-weight: 600;
    border-left: 3px solid var(--accent-primary);
}

.lessons-nav a:hover {
    background: var(--accent-light);
    color: var(--accent-primary);
    transform: translateX(5px);
}

/* Progress Tracker - Card Style */
.progress-tracker {
    background: var(--bg-secondary);
    border-radius: 18px;
    padding: 20px;
    margin-top: 30px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}

.progress-tracker:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 5px 15px var(--shadow-hover);
}

.progress-tracker h4 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.1rem;
    font-weight: 600;
}

.progress-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: conic-gradient(var(--lesson-primary) 0deg, var(--border-color) 0deg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    position: relative;
}

.progress-circle::before {
    content: '';
    position: absolute;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--bg-secondary);
}

.progress-percent {
    position: relative;
    z-index: 1;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--lesson-primary);
}

.progress-stats {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.progress-stats div {
    margin: 5px 0;
}

/* ================= MAIN CONTENT ================= */
.lessons-main {
    background: var(--bg-main);
    border: 2px solid var(--border-color);
    border-radius: 24px;
    padding: 25px;
    transition: all var(--transition-speed) ease;
    box-shadow: var(--card-shadow);
}

.lessons-main:hover {
    border-color: var(--accent-primary);
    transform: scale(1.01);
    box-shadow: 0 8px 25px var(--shadow-hover);
}

.lessons-main h1 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 5px;
    font-weight: 700;
}

.lessons-subtitle {
    color: var(--text-muted);
    margin-bottom: 25px;
    font-size: 1rem;
}

/* Level Tabs */
.level-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.level-tab {
    padding: 10px 25px;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.level-tab.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.level-tab:hover {
    transform: translateY(-2px);
    border-color: var(--accent-primary);
    box-shadow: 0 5px 15px var(--shadow-hover);
}

/* Lessons Grid */
.lessons-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 30px;
}

/* Lesson Cards - Hover Effects */
.lesson-card {
    background: var(--lesson-card-bg);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    position: relative;
    min-height: 160px;
    box-shadow: var(--card-shadow);
}

.lesson-card:hover {
    transform: translateY(-5px) scale(1.02);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 25px var(--shadow-hover);
}

.lesson-card.completed {
    background: linear-gradient(135deg, var(--bg-secondary), rgba(40, 167, 69, 0.1));
    border-color: var(--lesson-success);
}

.lesson-card.current {
    border-color: var(--accent-primary);
    border-width: 3px;
    background: var(--accent-light);
}

.lesson-card.locked {
    opacity: 0.7;
    cursor: not-allowed;
    filter: grayscale(0.3);
}

.lesson-card.locked:hover {
    transform: none;
    border-color: var(--border-color);
    box-shadow: var(--card-shadow);
}

.lesson-number {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 500;
}

.lesson-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.lesson-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.lesson-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.lesson-status {
    position: absolute;
    top: 15px;
    right: 15px;
}

.status-badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-badge.completed {
    background: var(--lesson-success);
    color: white;
}

.status-badge.current {
    background: var(--accent-primary);
    color: white;
}

.status-badge.locked {
    background: var(--border-color);
    color: var(--text-muted);
}

/* Current Lesson Section */
.current-lesson {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 25px;
    margin-top: 30px;
    transition: all var(--transition-speed) ease;
    box-shadow: var(--card-shadow);
}

.current-lesson:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 8px 25px var(--shadow-hover);
}

.current-lesson h2 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 600;
}

.lesson-instruction {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    padding: 15px;
    background: var(--bg-card);
    border-radius: 12px;
    border-left: 4px solid var(--accent-primary);
    transition: all var(--transition-speed) ease;
}

.lesson-instruction:hover {
    border-left-width: 6px;
}

.target-keys {
    font-size: 2rem;
    text-align: center;
    padding: 20px;
    background: var(--bg-card);
    border-radius: 12px;
    margin-bottom: 15px;
    font-family: 'Fira Code', monospace;
    letter-spacing: 4px;
    color: var(--accent-primary);
    font-weight: 600;
    border: 2px dashed var(--border-strong);
    transition: all var(--transition-speed) ease;
}

.target-keys:hover {
    border-color: var(--accent-primary);
    transform: scale(1.02);
}

.lesson-input {
    width: 100%;
    padding: 15px 20px;
    font-size: 1.2rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-family: 'Fira Code', monospace;
    transition: all var(--transition-speed) ease;
}

.lesson-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-light);
    transform: scale(1.02);
}

.lesson-feedback {
    min-height: 50px;
    padding: 15px;
    border-radius: 12px;
    margin: 15px 0;
    font-weight: 500;
    text-align: center;
    font-size: 1rem;
    transition: all var(--transition-speed) ease;
}

.lesson-feedback.success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--lesson-success);
    border: 1px solid var(--lesson-success);
}

.lesson-feedback.error {
    background: rgba(220, 53, 69, 0.1);
    color: var(--lesson-danger);
    border: 1px solid var(--lesson-danger);
}

.lesson-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

.prev-btn, .next-btn, .reset-btn {
    padding: 12px 30px;
    border: none;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.prev-btn {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.next-btn {
    background: var(--accent-primary);
    color: white;
}

.reset-btn {
    background: var(--accent-warning);
    color: var(--text-inverse);
}

.prev-btn:hover, .next-btn:hover, .reset-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 20px var(--shadow-hover);
}

.prev-btn:hover {
    border-color: var(--accent-primary);
    background: var(--accent-light);
}

.next-btn:hover {
    background: var(--accent-hover);
}

.reset-btn:hover {
    background: #e0a800;
}

/* ================= RIGHT SIDEBAR ================= */
.lessons-right {
    background: var(--bg-right);
    border: 2px solid var(--border-color);
    border-radius: 24px;
    padding: 20px;
    transition: all var(--transition-speed) ease;
    box-shadow: var(--card-shadow);
    height: fit-content;
    position: sticky;
    top: 20px;
}

.lessons-right:hover {
    border-color: var(--accent-primary);
    transform: scale(1.02);
    box-shadow: 0 8px 25px var(--shadow-hover);
}

/* Cards in Right Sidebar */
.tips-card, .stats-card, .achievement-card {
    background: var(--bg-secondary);
    border-radius: 18px;
    padding: 20px;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}

.tips-card:hover, .stats-card:hover, .achievement-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px var(--shadow-hover);
}

.tips-card h3, .stats-card h3, .achievement-card h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-size: 1.1rem;
    font-weight: 600;
}

.tips-card ul {
    list-style: none;
}

.tips-card li {
    padding: 10px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-speed) ease;
}

.tips-card li:last-child {
    border-bottom: none;
}

.tips-card li:hover {
    color: var(--accent-primary);
    transform: translateX(5px);
}

.tips-card li::before {
    content: "💡";
    font-size: 1rem;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}

.stat-row:last-child {
    border-bottom: none;
}

.stat-row:hover {
    color: var(--accent-primary);
    transform: translateX(5px);
}

.stat-row span:last-child {
    font-weight: 700;
    color: var(--accent-primary);
    font-size: 1.1rem;
}

/* Achievement Items */
.achievement-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-card);
    border-radius: 12px;
    margin-bottom: 8px;
    transition: all var(--transition-speed) ease;
    border: 1px solid transparent;
}

.achievement-item:hover {
    transform: translateX(5px) scale(1.02);
    border-color: var(--accent-primary);
    box-shadow: 0 5px 15px var(--shadow-hover);
}

.achievement-icon {
    font-size: 1.8rem;
    min-width: 40px;
    text-align: center;
}

.achievement-info {
    flex: 1;
}

.achievement-name {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.achievement-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ================= FOOTER ================= */
.test-footer {
    margin-top: 60px;
    padding: 0;
    border-top: 2px solid var(--border-color);
    width: 100%;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 30px;
    padding: 40px 0;
    width: 100%;
}

/* LEFT SIDE: Logo + Copyright under logo */
.footer-left {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    flex: 1;
    min-width: 200px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--accent-primary);
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 14px;
}

/* CENTER: 2 rows with 4 buttons each */
.footer-center {
    flex: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    min-width: 300px;
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(4, auto);
    gap: 15px 25px;
    justify-content: center;
}

.footer-links-grid a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
    white-space: nowrap;
}

.footer-links-grid a:hover {
    color: var(--accent-primary);
}

/* RIGHT SIDE: Independent platform text with email */
.footer-right {
    flex: 1;
    text-align: right;
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.6;
    min-width: 220px;
}

.footer-right p {
    margin-bottom: 5px;
}

.footer-right a {
    color: var(--accent-primary);
    text-decoration: none;
}

.footer-right a:hover {
    text-decoration: underline;
}

/* ================= NOTIFICATION ================= */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--accent-primary);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    z-index: 1000;
    animation: slideIn 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ================= SCROLLBAR STYLING ================= */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 4px;
    transition: background var(--transition-speed) ease;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* ================= DARK MODE SPECIFIC ADJUSTMENTS ================= */
[data-theme="dark"] .lesson-card.completed {
    background: linear-gradient(135deg, var(--bg-secondary), rgba(74, 222, 128, 0.1));
}

[data-theme="dark"] .lesson-card.current {
    background: var(--accent-light);
}

[data-theme="dark"] .lesson-feedback.success {
    background: rgba(74, 222, 128, 0.1);
}

[data-theme="dark"] .lesson-feedback.error {
    background: rgba(248, 113, 113, 0.1);
}

[data-theme="dark"] .progress-circle::before {
    background: var(--bg-secondary);
}

[data-theme="dark"] .tips-card li:hover {
    color: var(--accent-primary);
}

[data-theme="dark"] .achievement-item:hover {
    background: var(--lesson-hover);
}

/* Dark mode specific fixes */
[data-theme="dark"] .lessons-page {
    background: var(--bg-primary);
}

[data-theme="dark"] .lessons-header {
    background: var(--bg-primary);
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .lessons-sidebar,
[data-theme="dark"] .lessons-main,
[data-theme="dark"] .lessons-right {
    background: var(--bg-card);
    border-color: var(--border-color);
}

[data-theme="dark"] .progress-tracker,
[data-theme="dark"] .tips-card,
[data-theme="dark"] .stats-card,
[data-theme="dark"] .achievement-card {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .lesson-card {
    background: var(--lesson-card-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .current-lesson {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .lesson-instruction,
[data-theme="dark"] .target-keys,
[data-theme="dark"] .lesson-input {
    background: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .prev-btn {
    background: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .footer-links a {
    color: var(--text-muted);
}

[data-theme="dark"] .footer-links a:hover {
    color: var(--accent-primary);
}

/* ================= HOVER EFFECTS (Like Results Page) ================= */

/* Card hover effects */
.hover-card {
    transition: all var(--transition-speed) ease;
    border: 2px solid var(--border-color);
}

.hover-card:hover {
    transform: scale(1.02);
    border-color: var(--accent-primary);
    box-shadow: 0 0 25px var(--shadow-hover);
}

/* Button hover effects */
.hover-btn {
    transition: all var(--transition-speed) ease;
    cursor: pointer;
}

.hover-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--shadow-hover);
}

/* Link hover effects */
.hover-link {
    transition: all var(--transition-speed) ease;
}

.hover-link:hover {
    color: var(--accent-primary);
    transform: translateX(5px);
}

/* Navigation item hover */
.lessons-nav a {
    transition: all var(--transition-speed) ease;
    display: block;
    padding: 12px 15px;
    border-radius: 12px;
}

.lessons-nav a:hover {
    background: var(--accent-light);
    color: var(--accent-primary);
    transform: translateX(5px);
}

/* Container hover effects - Like Results Page */
.lessons-sidebar:hover,
.lessons-main:hover,
.lessons-right:hover,
.current-lesson:hover,
.progress-tracker:hover,
.tips-card:hover,
.stats-card:hover,
.achievement-card:hover {
    border-color: var(--accent-primary);
    transform: scale(1.02);
    box-shadow: 0 8px 25px var(--shadow-hover);
}

/* Lesson card specific hover */
.lesson-card:hover {
    transform: translateY(-5px) scale(1.02);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 25px var(--shadow-hover);
}

/* Status badge transitions */
.status-badge {
    transition: all var(--transition-speed) ease;
}

.status-badge:hover {
    transform: scale(1.1);
}

/* ================= RESPONSIVE ================= */
@media screen and (max-width: 1200px) {
    .lessons-layout {
        grid-template-columns: 220px 1fr 240px;
        gap: 20px;
    }
    
    .lessons-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 992px) {
    .lessons-layout {
        grid-template-columns: 1fr;
    }
    
    .lessons-sidebar, 
    .lessons-right {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .lessons-header {
        flex-wrap: nowrap;
        gap: 5px;
        padding: 10px 0;
    }
    
    .site-title {
        font-size: 1.5rem;
    }
    
    .login-btn {
        padding: 6px 15px;
        font-size: 13px;
    }
    
    .mobile-menu-btn {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .footer-container {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-left, .footer-right {
        align-items: center;
        text-align: center;
    }
    
    .footer-links-grid {
        grid-template-columns: repeat(2, auto);
    }
}

@media screen and (max-width: 768px) {
    .lessons-main {
        padding: 20px;
    }
    
    .lessons-main h1 {
        font-size: 1.8rem;
    }
    
    .level-tabs {
        justify-content: center;
        gap: 8px;
    }
    
    .level-tab {
        padding: 8px 20px;
        font-size: 0.9rem;
    }
    
    .lessons-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .lesson-card {
        padding: 15px;
        min-height: 140px;
    }
    
    .lesson-title {
        font-size: 1rem;
    }
    
    .lesson-description {
        font-size: 0.8rem;
    }
    
    .current-lesson {
        padding: 20px;
    }
    
    .current-lesson h2 {
        font-size: 1.3rem;
    }
    
    .target-keys {
        font-size: 1.8rem;
        padding: 15px;
    }
    
    .lesson-controls {
        flex-direction: column;
        gap: 8px;
    }
    
    .prev-btn, .next-btn, .reset-btn {
        width: 100%;
        padding: 10px;
    }
    
    .theme-toggle {
        bottom: 10px;
        right: 10px;
    }
    
    .theme-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
}

@media screen and (max-width: 480px) {
    .lessons-header {
        padding: 8px 0;
    }
    
    .site-title {
        font-size: 1.1rem;
    }
    
    .login-btn {
        padding: 4px 10px;
        font-size: 11px;
        border-width: 1.5px;
    }
    
    .mobile-menu-btn {
        padding: 4px 8px;
        font-size: 11px;
    }
    
    .header-right {
        gap: 4px;
    }
    
    .lessons-main {
        padding: 15px;
    }
    
    .lessons-main h1 {
        font-size: 1.5rem;
    }
    
    .lessons-subtitle {
        font-size: 0.9rem;
    }
    
    .level-tabs {
        flex-wrap: wrap;
    }
    
    .level-tab {
        width: 100%;
        text-align: center;
        padding: 8px;
    }
    
    .lessons-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .target-keys {
        font-size: 1.5rem;
        letter-spacing: 2px;
    }
    
    .lesson-input {
        font-size: 1rem;
        padding: 12px 15px;
    }
    
    .lesson-feedback {
        font-size: 0.9rem;
        padding: 12px;
    }
    
    .footer-links-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .footer-links-grid a {
        font-size: 12px;
    }
    
    .footer-left, .footer-right {
        width: 100%;
    }
    
    .footer-copyright {
        font-size: 12px;
    }
    
    .footer-right p {
        font-size: 12px;
    }
}

@media screen and (max-width: 360px) {
    .site-title {
        font-size: 1rem;
    }
    
    .login-btn {
        padding: 3px 8px;
        font-size: 10px;
    }
    
    .mobile-menu-btn {
        padding: 3px 6px;
        font-size: 10px;
    }
    
    .header-right {
        gap: 3px;
    }
    
    .lessons-main h1 {
        font-size: 1.3rem;
    }
    
    .target-keys {
        font-size: 1.2rem;
        letter-spacing: 1px;
    }
}

/* ================= LANDSCAPE MODE ================= */
@media screen and (max-height: 600px) and (orientation: landscape) {
    .lessons-sidebar, .lessons-right {
        max-height: 400px;
        overflow-y: auto;
    }
    
    .theme-toggle {
        bottom: 5px;
        right: 5px;
    }
}