/* --- CSS Reset & Base Styles --- */
:root {
    --color-primary: #B8860B; /* DarkGoldenrod for Gold Accent */
    --color-background: #FFFFFF; /* Pure White Background */
    --color-surface: #F9F9F9; /* Very light gray for cards */
    --color-text-dark: #1A1A1A; /* Near black for high contrast text */
    --color-text-light: #555555;
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Noto Sans Arabic', sans-serif;
    --spacing-unit: 16px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-background);
    color: var(--color-text-dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Mobile First Layout --- */
#app-container {
    padding: var(--spacing-unit);
    max-width: 1200px;
    margin: 0 auto;
}

.page-section {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.page-title {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.page-subtitle {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-unit);
    font-size: 1rem;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-unit);
    border-left: 4px solid var(--color-primary);
    padding-left: 10px;
}

/* --- Header & Navigation (App Bar Style) --- */
.app-header {
    background-color: var(--color-background);
    padding: 12px var(--spacing-unit);
    border-bottom: 1px solid #EEEEEE;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.logo {
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--color-text-dark);
}

.nav-bar {
    display: flex;
    gap: 10px;
}

.nav-item {
    text-decoration: none;
    color: var(--color-text-light);
    font-size: 0.85rem;
    padding: 6px 10px;
    border-radius: 6px;
    transition: color 0.3s, background-color 0.3s;
}

.nav-item:hover {
    color: var(--color-primary);
}

.nav-item.active {
    color: var(--color-primary);
    font-weight: 700;
    background-color: rgba(184, 134, 11, 0.1);
}

/* --- Cards and Surface Elements --- */
.card {
    background-color: var(--color-surface);
    border-radius: 12px;
    padding: var(--spacing-unit);
    margin-bottom: var(--spacing-unit);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    transition: transform 0.3s ease-out, box-shadow 0.3s ease-out;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

/* --- Buttons --- */
button, .btn-download, .btn-primary {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 700;
    transition: background-color 0.3s, transform 0.1s, box-shadow 0.3s;
    text-decoration: none;
    text-align: center;
}

.btn-share {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    width: 100%;
    margin-top: var(--spacing-unit);
}

.btn-share:hover {
    background-color: rgba(184, 134, 11, 0.1);
    transform: translateY(-1px);
}

.btn-download {
    background-color: var(--color-primary);
    color: var(--color-background);
    font-size: 0.9rem;
    padding: 8px 15px;
}

.btn-download:hover {
    background-color: #A0522D; /* Sienna for darker gold hover */
    box-shadow: 0 3px 8px rgba(184, 134, 11, 0.5);
}

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

.btn-primary:hover {
    background-color: #A0522D;
}

/* --- Daily Verse --- */
.daily-verse-section {
    text-align: center;
    padding: calc(var(--spacing-unit) * 2);
}

.verse-content {
    margin: var(--spacing-unit) 0;
}

.arabic-text {
    font-family: var(--font-sans);
    font-size: 2.5rem;
    margin-bottom: 10px;
    direction: rtl;
    color: var(--color-text-dark);
}

.translation {
    font-style: italic;
    color: var(--color-text-light);
    margin-bottom: 5px;
}

.reference {
    font-size: 0.9rem;
    color: var(--color-primary);
    font-weight: 700;
}

/* --- Featured Video Mockup --- */
.video-player-mock {
    background-color: #000;
    border-radius: 8px;
    aspect-ratio: 16 / 9;
    margin-bottom: var(--spacing-unit);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.video-placeholder {
    color: white;
    text-align: center;
}

.play-icon {
    width: 50px;
    height: 50px;
    fill: currentColor;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.video-player-mock:hover .play-icon {
    opacity: 1;
}

.video-info h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
}
.video-info p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* --- Quick Links / Bento Grid (Mobile Stacking) --- */
.quick-links-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-unit);
}

.bento-item {
    background-color: var(--color-surface);
    border-radius: 12px;
    padding: var(--spacing-unit);
    text-decoration: none;
    color: var(--color-text-dark);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 120px;
    transition: background-color 0.3s, transform 0.3s;
    border: 1px solid #EEE;
}

.bento-item:hover {
    background-color: #EFEFEF;
    transform: translateY(-3px);
}

.bento-item .icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.bento-item h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
}

.bento-item p {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* --- Library Styles (Bookshelf) --- */
.bookshelf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-unit);
}

.book-card {
    text-align: center;
    padding: 15px;
    background-color: var(--color-background);
    border: 1px solid #EEE;
    border-radius: 10px;
    transition: all 0.3s;
}

.book-card:hover {
    box-shadow: 0 4px 15px rgba(184, 134, 11, 0.15);
    transform: scale(1.02);
}

.book-cover-mock {
    height: 100px;
    background-color: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.9rem;
}

.book-details h4 {
    font-size: 1rem;
    margin-bottom: 3px;
    font-family: var(--font-serif);
}

.book-details p {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-bottom: 10px;
}

/* --- Videos Page Styles --- */
.video-player-feature {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.video-player-large {
    background-color: #000;
    border-radius: 10px;
    margin-bottom: var(--spacing-unit);
    overflow: hidden;
}

.video-screen {
    aspect-ratio: 16 / 9;
    background-color: #222;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.play-icon.large {
    width: 80px;
    height: 80px;
    fill: var(--color-primary);
    opacity: 0.9;
}

.player-controls {
    padding: 8px var(--spacing-unit);
    background-color: #111;
    color: white;
}

.progress-bar-container {
    height: 4px;
    background-color: #444;
    border-radius: 2px;
    margin-bottom: 5px;
}

.progress-bar {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: width 0.2s linear;
}

.controls-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}

.settings-icons span {
    margin-left: 12px;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.settings-icons span:hover {
    opacity: 1;
}

.video-details h2 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: 5px;
}

.channel {
    color: var(--color-primary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-unit);
}

.video-list-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-unit);
}

.video-thumb {
    display: flex;
    background-color: var(--color-background);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    cursor: pointer;
}

.thumb-mock {
    width: 100px;
    min-width: 100px;
    height: 60px;
    background-color: #DDD;
    display: flex;
    align-items: center;
    justify-content: center;
}

.thumb-info {
    padding: 10px;
}

.thumb-info h4 {
    font-size: 1rem;
    margin: 0 0 2px 0;
    font-family: var(--font-serif);
}

.thumb-info p {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

/* --- Footer --- */
.app-footer {
    text-align: center;
    padding: calc(var(--spacing-unit) * 1.5) var(--spacing-unit);
    font-size: 0.8rem;
    color: var(--color-text-light);
    border-top: 1px solid #EEE;
    margin-top: var(--spacing-unit);
}

/* --- Animations (Scroll Triggered Fades) --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive Layout Adjustments (Tablet/Desktop) --- */
@media (min-width: 768px) {
    body {
        font-size: 17px;
    }

    .app-header {
        padding: 15px 30px;
    }

    .logo {
        font-size: 1.8rem;
    }

    .nav-item {
        font-size: 1rem;
        padding: 8px 15px;
    }

    /* Bento Grid Layout */
    .quick-links-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        grid-template-areas:
            "large small small";
        gap: var(--spacing-unit);
    }

    .large-item {
        grid-area: large;
        min-height: 250px;
    }

    .small-item {
        grid-area: small;
    }

    /* Library Grid */
    .bookshelf-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }

    /* Video Layout */
    .video-player-feature {
        display: flex;
        gap: var(--spacing-unit);
        align-items: flex-start;
    }

    .video-player-large {
        flex: 2;
        margin-bottom: 0;
    }

    .video-details {
        flex: 1;
    }

    .video-list-grid {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .video-thumb {
        flex: 1 1 calc(33.333% - var(--spacing-unit));
        max-width: calc(33.333% - var(--spacing-unit));
    }
}

@media (min-width: 1024px) {
    .bookshelf-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .video-list-grid {
        flex-wrap: nowrap;
    }

    .video-thumb {
        flex: 1 1 200px;
        max-width: 200px;
    }
}

/* Karbon Sites Branding */

  #karbon-promo-banner {
      position: fixed;
      bottom: 10px;
      right: 10px;
      background-color: rgba(0, 0, 0, 0.8);
      color: white;
      padding: 8px 16px;
      border-radius: 8px;
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      font-size: 14px;
      z-index: 10000;
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      box-shadow: 0 4px 6px rgba(0,0,0,0.1);
      transition: transform 0.2s ease-in-out;
  }
  #karbon-promo-banner:hover {
      transform: scale(1.05);
  }