/* =======================================================
   EATR Platform - Premium Dark Theme
   9-Sinf Elektron Darslik
   ======================================================= */

:root {
    /* Dark Theme Colors */
    --dark-bg-primary: #0f172a;
    --dark-bg-secondary: #1e293b;
    --dark-bg-tertiary: #334155;
    --dark-surface: rgba(30, 41, 59, 0.8);

    /* Text Colors */
    --dark-text-primary: #f1f5f9;
    --dark-text-secondary: #94a3b8;
    --dark-text-muted: #64748b;

    /* Accent Colors */
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-green: #10b981;
    --accent-yellow: #f59e0b;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-card: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);

    /* Glassmorphism */
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(148, 163, 184, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* Dark Theme Body */
body.dark-theme {
    background: var(--dark-bg-primary);
    color: var(--dark-text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Override main.css variables for dark theme */
    --heading-color: #f1f5f9 !important;
    --default-color: #94a3b8;
    --background-color: #0f172a;
}

body.dark-theme .main {
    background: var(--dark-bg-primary);
    min-height: 100vh;
}

body.dark-theme h1,
body.dark-theme h2,
body.dark-theme h3,
body.dark-theme h4,
body.dark-theme h5,
body.dark-theme h6 {
    color: var(--dark-text-primary) !important;
}

body.dark-theme p {
    color: var(--dark-text-secondary);
}

/* Premium Header */
body.dark-theme .header {
    background: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

body.dark-theme .header .sitename {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

/* Glass Cards */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    transition: all 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* Stats Cards */
.stats-card {
    background: var(--dark-bg-secondary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.stats-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.stats-card .stats-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stats-card .stats-icon.bg-blue {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-blue);
}

.stats-card .stats-icon.bg-green {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
}

.stats-card .stats-icon.bg-yellow {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-yellow);
}

.stats-card .stats-icon.bg-purple {
    background: rgba(139, 92, 246, 0.15);
    color: var(--accent-purple);
}

.stats-card .stats-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-text-primary);
    margin-bottom: 0.25rem;
}

.stats-card .stats-label {
    color: var(--dark-text-secondary);
    font-size: 0.875rem;
}

/* Topic Cards */
.topic-card {
    background: var(--dark-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.topic-card:hover {
    background: var(--dark-bg-tertiary);
    transform: translateX(8px);
    border-color: var(--accent-blue);
}

.topic-card .topic-number {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    color: white;
    flex-shrink: 0;
}

.topic-card .topic-info {
    flex: 1;
    min-width: 0;
}

.topic-card .topic-title {
    font-weight: 600;
    color: var(--dark-text-primary);
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topic-card .topic-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--dark-text-muted);
}

.topic-card .topic-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.topic-card .status-completed {
    color: var(--accent-green);
}

.topic-card .status-in-progress {
    color: var(--accent-yellow);
}

.topic-card .status-locked {
    color: var(--dark-text-muted);
}

/* Progress Bar */
.progress-bar-custom {
    height: 8px;
    background: var(--dark-bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-custom .progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 0.5s ease;
}

/* Section Title */
.section-title-dark {
    color: #f1f5f9 !important;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Force white text on dark theme headings */
body.dark-theme .section-title-dark,
body.dark-theme .section h1,
body.dark-theme .section h2,
body.dark-theme .section h3,
body.dark-theme .section h4 {
    color: #f1f5f9 !important;
    -webkit-text-fill-color: #f1f5f9 !important;
}

/* Buttons */
.btn-gradient {
    background: var(--gradient-primary);
    border: none;
    color: white;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.btn-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.3);
    color: white;
}

.btn-outline-glass {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--dark-text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.btn-outline-glass:hover {
    background: var(--dark-bg-secondary);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* Video Container */
.video-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--dark-bg-secondary);
    border: 1px solid var(--glass-border);
}

.video-container .ratio {
    border-radius: var(--radius-lg);
}

/* Material List */
.material-item {
    background: var(--dark-bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
}

.material-item:hover {
    border-color: var(--accent-blue);
    background: var(--dark-bg-tertiary);
}

.material-item .material-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-right: 1rem;
}

.material-item .material-icon.pdf {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
}

.material-item .material-icon.doc {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-blue);
}

.material-item .material-icon.ppt {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-yellow);
}

.material-item .material-icon.img {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
}

/* Content Area */
.content-area {
    background: var(--dark-bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    color: var(--dark-text-primary);
    line-height: 1.8;
}

.content-area h1,
.content-area h2,
.content-area h3 {
    color: var(--dark-text-primary);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

.content-area p {
    margin-bottom: 1rem;
    color: var(--dark-text-secondary);
}

.content-area ul,
.content-area ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.content-area li {
    margin-bottom: 0.5rem;
    color: var(--dark-text-secondary);
}

/* Test Cards */
.test-card {
    background: var(--gradient-card);
    border: 1px solid var(--accent-blue);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-top: 2rem;
}

.test-card .test-title {
    font-weight: 700;
    color: var(--dark-text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

/* Navigation Pills */
.nav-pills-dark .nav-link {
    color: var(--dark-text-secondary);
    border-radius: var(--radius-md);
    padding: 0.75rem 1.25rem;
    transition: all 0.3s ease;
}

.nav-pills-dark .nav-link:hover {
    background: var(--dark-bg-tertiary);
    color: var(--dark-text-primary);
}

.nav-pills-dark .nav-link.active {
    background: var(--gradient-primary);
    color: white;
}

/* Footer Dark */
body.dark-theme .footer {
    background: var(--dark-bg-secondary) !important;
    border-top: 1px solid var(--glass-border);
    color: var(--dark-text-secondary);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.5s ease forwards;
}

.animate-delay-1 {
    animation-delay: 0.1s;
}

.animate-delay-2 {
    animation-delay: 0.2s;
}

.animate-delay-3 {
    animation-delay: 0.3s;
}

.animate-delay-4 {
    animation-delay: 0.4s;
}

/* Scrollbar */
body.dark-theme::-webkit-scrollbar {
    width: 8px;
}

body.dark-theme::-webkit-scrollbar-track {
    background: var(--dark-bg-primary);
}

body.dark-theme::-webkit-scrollbar-thumb {
    background: var(--dark-bg-tertiary);
    border-radius: 4px;
}

body.dark-theme::-webkit-scrollbar-thumb:hover {
    background: var(--dark-text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .stats-card {
        padding: 1rem;
    }

    .stats-card .stats-value {
        font-size: 1.5rem;
    }

    .topic-card {
        padding: 1rem;
    }

    .topic-card .topic-number {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}