/* 
  CSS Design System for AV-Scheduler Tutorials
  Minimalist Navy Blue Style
*/

:root {
    /* Minimalist Navy Palette */
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --surface-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;

    --accent-color: #1e3a8a;
    /* Navy Blue */
    --accent-hover: #172554;

    --badge-general: #f1f5f9;
    --badge-general-text: #1e3a8a;
    --badge-ios: #f1f5f9;
    --badge-ios-text: #0284c7;
    --badge-android: #f1f5f9;
    --badge-android-text: #059669;

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Outfit', system-ui, sans-serif;

    /* Spacing & Utilities */
    --border-radius: 8px;
    /* Tighter radius for a minimalist look */
    --transition: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography Details */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
}

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

/* Layout Containers */
.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

/* Header */
.header {
    padding: 60px 0 40px;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo i {
    font-size: 2.2rem;
    color: var(--accent-color);
}

.logo h1 {
    font-size: 2.5rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Filters */
.filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 24px;
    border-radius: 40px;
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.filter-btn.active {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

/* Tutorials Grid */
.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    padding-bottom: 80px;
}

/* Section Divider */
.section-divider {
    grid-column: 1 / -1;
    text-align: center;
    margin: 40px 0 20px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.section-divider i {
    font-size: 2rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.section-divider h2 {
    font-size: 1.8rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.section-divider p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Tutorial Cards */
.tutorial-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.tutorial-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
}

.video-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background-color: #000;
    overflow: hidden;
    border-bottom: 1px solid var(--border-color);
}

.video-container-vertical {
    aspect-ratio: 9 / 16;
}

.styled-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.card-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.badge {
    align-self: flex-start;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 12px;
    background: var(--badge-general);
    color: var(--badge-general-text);
}

.badge-ios {
    background: var(--badge-ios);
    color: var(--badge-ios-text);
}

.badge-android {
    background: var(--badge-android);
    color: var(--badge-android-text);
}

.card-content h2 {
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 0;
    flex-grow: 1;
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px 0;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

.container-footer p {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .logo h1 {
        font-size: 2rem;
    }

    .section-divider h2 {
        font-size: 1.5rem;
    }

    .tutorials-grid {
        grid-template-columns: 1fr;
    }
}

/* Utility classes for JS functionality */
.hidden {
    display: none !important;
}

/* Minimalist Video Player Controls Override (Chrome/Opera/Safari) */
video::-webkit-media-controls-panel {
    background-color: rgba(0, 0, 0, 0.6) !important;
}

/* Instructions Styles */
.note-box {
    background-color: #fffbeb;
    border-left: 4px solid #f59e0b;
    color: #92400e;
    padding: 12px 16px;
    border-radius: 4px;
    font-size: 0.85rem;
    margin-bottom: 16px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.note-box strong {
    font-weight: 600;
    color: #b45309;
}

ol.step-list {
    padding-left: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

ol.step-list li {
    margin-bottom: 8px;
}

ol.step-list li strong {
    color: var(--text-primary);
}

.full-width {
    grid-column: 1 / -1;
    background-color: var(--surface-hover);
}

.post-install-grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 16px;
}

@media (min-width: 768px) {
    .post-install-grid {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.post-install-content {
    flex: 1;
}

.post-install-image {
    flex-shrink: 0;
    width: 100%;
    max-width: 260px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    /* Clean minimalist shadow */
    border: 4px solid #fff;
    margin: 0 auto;
}

.post-install-image img {
    width: 100%;
    height: auto;
    display: block;
}

.card-badges {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.card-badges .badge {
    margin-bottom: 0;
}

.badge-audio {
    background: #e0f2fe;
    color: #0369a1;
    display: flex;
    align-items: center;
    gap: 4px;
}

.badge-no-audio {
    background: #f1f5f9;
    color: #64748b;
    display: flex;
    align-items: center;
    gap: 4px;
}

.large-steps {
    font-size: 1.05rem !important;
}

.summary-text {
    font-size: 0.95rem;
    color: var(--accent-color);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    background-color: #e0e7ff;
    padding: 12px 16px;
    border-radius: var(--border-radius);
}