/* Enhanced Base Theme Variables */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent-primary: #2563eb;
    --accent-secondary: #4f46e5;
    --accent-hover: #1d4ed8;
    --accent-light: #3b82f6;
    --error: #dc2626;
    --success: #059669;
    --warning: #d97706;
    --info: #2563eb;
    --card-bg: #ffffff;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --nav-bg: #ffffff;
    --footer-bg: #ffffff;
    --border: rgba(15, 23, 42, 0.1);
    --border-strong: rgba(15, 23, 42, 0.2);
    --accent-primary-rgb: 37, 99, 235;
    --accent-secondary-rgb: 79, 70, 229;
    --transition-all: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark theme variables */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --accent-primary: #3b82f6;
    --accent-secondary: #6366f1;
    --accent-hover: #2563eb;
    --accent-light: #60a5fa;
    --error: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --info: #3b82f6;
    --card-bg: #1e293b;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --nav-bg: #020617;
    --footer-bg: #1e293b;
    --border: rgba(148, 163, 184, 0.1);
    --border-strong: rgba(148, 163, 184, 0.2);
    --accent-primary-rgb: 59, 130, 246;
    --accent-secondary-rgb: 99, 102, 241;
}

/* Auto dark mode detection */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-muted: #64748b;
        --accent-primary: #3b82f6;
        --accent-secondary: #6366f1;
        --accent-hover: #2563eb;
        --accent-light: #60a5fa;
        --card-bg: #1e293b;
        --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
        --nav-bg: #020617;
        --footer-bg: #1e293b;
        --border: rgba(148, 163, 184, 0.1);
        --border-strong: rgba(148, 163, 184, 0.2);
    }
}

/* Global Styles with Enhanced Dark Mode Support */
html {
    height: 100%;
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    transition: var(--transition-all);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Enhanced Navigation */
.nav-custom {
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border);
    transition: var(--transition-all);
    backdrop-filter: blur(10px);
}

/* Enhanced Footer */
.footer-custom {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    transition: var(--transition-all);
}

/* Enhanced Card Styles */
.card-custom {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    box-shadow: var(--card-shadow);
    transition: var(--transition-all);
}

.card-custom:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .card-custom:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* Enhanced Button Styles */
.btn-custom {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    border: 1px solid var(--accent-primary);
    transition: var(--transition-all);
}

.btn-custom:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-1px);
}

/* Enhanced Form Elements */
input, textarea, select {
    background-color: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
    transition: var(--transition-all);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(var(--accent-primary-rgb), 0.1);
}

/* Typography Enhancements */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    transition: var(--transition-all);
}

.section-header {
    color: var(--text-primary);
    transition: var(--transition-all);
}

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

/* Dark mode specific overrides */
[data-theme="dark"] .text-gray-900 {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .text-gray-600 {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .text-gray-500 {
    color: var(--text-muted) !important;
}

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

[data-theme="dark"] .bg-gray-50 {
    background-color: var(--bg-tertiary) !important;
}

[data-theme="dark"] .bg-gray-100 {
    background-color: var(--bg-tertiary) !important;
}

[data-theme="dark"] .border-gray-200 {
    border-color: var(--border) !important;
}

[data-theme="dark"] .border-gray-300 {
    border-color: var(--border-strong) !important;
}

/* Enhanced Shadows for Dark Mode */
[data-theme="dark"] .shadow,
[data-theme="dark"] .shadow-md,
[data-theme="dark"] .shadow-lg {
    box-shadow: var(--card-shadow);
}

/* Link styles */
a {
    color: var(--accent-primary);
    transition: var(--transition-all);
}

a:hover {
    color: var(--accent-hover);
}

/* Badge and label styles */
.badge {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    border: 1px solid var(--accent-primary);
}

/* Alert and notification styles */
.alert {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.alert-success {
    background-color: rgba(var(--success), 0.1);
    border-color: var(--success);
    color: var(--success);
}

.alert-error {
    background-color: rgba(var(--error), 0.1);
    border-color: var(--error);
    color: var(--error);
}

.alert-warning {
    background-color: rgba(var(--warning), 0.1);
    border-color: var(--warning);
    color: var(--warning);
}
.footer-custom {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--accent-light);
    margin-top: auto;
    transition: background-color 0.3s ease;
}

/* Cards */
.card-custom {
    background-color: var(--card-bg);
    box-shadow: var(--card-shadow);
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.card-custom:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow), 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Buttons */
.btn-custom {
    background-color: var(--accent-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-custom:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

/* Theme Toggle */
#theme-toggle {
    padding: 0.5rem;
    border-radius: 9999px;
    transition: all 0.3s ease;
}

[data-theme="dark"] #theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] #theme-toggle:hover {
    background-color: rgba(0, 0, 0, 0.1);
}

/* Main Content */
main {
    flex: 1;
    width: 100%;
    max-width: 100vw;
    padding: 2rem 0;
}

/* Inputs */
.input-custom {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--accent-light);
    border-radius: 0.375rem;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.input-custom:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-light);
}

/* Section Headers */
.section-header {
    color: var(--text-primary);
    font-weight: 600;
    position: relative;
    transition: color 0.3s ease;
}

/* Gradients */
.gradient-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
}

.gradient-light {
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
}

/* Progress Bar */
.progress-custom {
    background-color: var(--bg-primary);
    border-radius: 9999px;
    height: 0.5rem;
    overflow: hidden;
}

.progress-custom .bar {
    background-color: var(--accent-primary);
    height: 100%;
    transition: width 0.3s ease;
}

/* Common Theme Classes */
.theme-card {
    @apply bg-[var(--card-bg)] rounded-2xl shadow-lg p-6;
}

.theme-text-primary {
    @apply text-[var(--text-primary)];
}

.theme-text-secondary {
    @apply text-[var(--text-secondary)];
}

.theme-bg-secondary {
    @apply bg-[var(--bg-secondary)];
}

.theme-border {
    @apply border-[var(--border)];
}

.theme-hover {
    @apply hover:bg-[var(--bg-hover)] transition-colors;
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn 0.5s ease-out;
}

.animate-slide-in {
    animation: slideIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}
/* Theme-aware Course Cards */
.course-card-short {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0e7ff 100%);
    border: 1px solid #bfdbfe;
}

[data-theme="dark"] .course-card-short {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border: 1px solid #475569;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-short {
        background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
        border: 1px solid #475569;
    }
}

.course-card-short-icon {
    background-color: #2563eb;
}

[data-theme="dark"] .course-card-short-icon {
    background-color: #3b82f6;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-short-icon {
        background-color: #3b82f6;
    }
}

.course-card-short-title {
    color: #1e40af;
}

[data-theme="dark"] .course-card-short-title {
    color: #93c5fd;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-short-title {
        color: #93c5fd;
    }
}

.course-card-short-text {
    color: #4b5563;
}

[data-theme="dark"] .course-card-short-text {
    color: #cbd5e1;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-short-text {
        color: #cbd5e1;
    }
}

.course-card-short-cta {
    color: #2563eb;
}

[data-theme="dark"] .course-card-short-cta {
    color: #60a5fa;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-short-cta {
        color: #60a5fa;
    }
}

/* Theme-aware Learning Course Cards */
.course-card-learning {
    background: linear-gradient(135deg, #f0fdf4 0%, #d1fae5 100%);
    border: 1px solid #86efac;
}

[data-theme="dark"] .course-card-learning {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border: 1px solid #475569;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-learning {
        background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
        border: 1px solid #475569;
    }
}

.course-card-learning-icon {
    background-color: #16a34a;
}

[data-theme="dark"] .course-card-learning-icon {
    background-color: #22c55e;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-learning-icon {
        background-color: #22c55e;
    }
}

.course-card-learning-title {
    color: #15803d;
}

[data-theme="dark"] .course-card-learning-title {
    color: #86efac;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-learning-title {
        color: #86efac;
    }
}

.course-card-learning-text {
    color: #4b5563;
}

[data-theme="dark"] .course-card-learning-text {
    color: #cbd5e1;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-learning-text {
        color: #cbd5e1;
    }
}

.course-card-learning-cta {
    color: #16a34a;
}

[data-theme="dark"] .course-card-learning-cta {
    color: #4ade80;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) .course-card-learning-cta {
        color: #4ade80;
    }
}