/**
 * Layout styles - Grid, containers, and responsive design
 */

/* Site header */
.site-header {
    background: linear-gradient(135deg, #1e3a5f, #0f2744);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    border-bottom: 1px solid #2a4a6d;
}

.site-header__title {
    color: #ffffff;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.site-header__tagline {
    color: #a8c5e2;
    font-size: var(--font-size-base);
    margin: 0;
}

/* Karaoke Video Background */
.karaoke-video-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    opacity: 0;
    transition: opacity 1s ease-in;
}

.karaoke-video-bg.active {
    opacity: 1;
}

.site-header {
    position: relative;
    overflow: hidden;
}

.site-header__content {
    position: relative;
    z-index: 2;
    transition: opacity 0.5s ease;
}

.site-header.karaoke-active .site-header__content {
    opacity: 0;
    pointer-events: none;
}

/* Karaoke Lyrics Container */
.karaoke-lyrics {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -30%);
    width: 100%;
    text-align: center;
    padding: 1rem;
    display: none;
    flex-direction: column;
    justify-content: center;
}

/* Only show the active song */
.karaoke-lyrics.active-song {
    display: flex;
}

/* When active, scroll the lyrics up slowly */
.site-header.karaoke-active .karaoke-lyrics.active-song {
    animation: scrollLyrics 12s ease-in-out forwards;
}

@keyframes scrollLyrics {
    0% {
        transform: translate(-50%, -30%);
    }
    100% {
        transform: translate(-50%, -70%);
    }
}

/* Individual Lyric Lines */
.lyric-line {
    font-family: 'Courier New', monospace;
    font-size: clamp(1rem, 4vw, 2rem);
    font-weight: bold;
    color: transparent;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 0.5rem 0;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
    text-shadow: none;
    /* Pixelated effect via text rendering */
    -webkit-font-smoothing: none;
    image-rendering: pixelated;
}

.lyric-line.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Karaoke highlight animation - text fills with color */
.lyric-line.highlight {
    animation: karaokeHighlight 2.5s ease-in-out forwards;
}

@keyframes karaokeHighlight {
    0% {
        color: #4a6fa5;
        text-shadow: 0 0 10px rgba(74, 111, 165, 0.5);
    }
    50% {
        color: #00ffff;
        text-shadow:
            0 0 5px #00ffff,
            0 0 10px #00ffff,
            0 0 20px #00ffff,
            0 0 40px #00ffff;
    }
    100% {
        color: #ff69b4;
        text-shadow:
            0 0 5px #ff69b4,
            0 0 10px #ff69b4,
            2px 2px 0 #000;
    }
}

/* CRT Scanlines overlay */
.scanlines {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15) 0px,
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 2px
    );
    pointer-events: none;
    z-index: 1;
}

/* Pixel grid overlay for extra retro effect */
.karaoke-video-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at center, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
    pointer-events: none;
    z-index: 0;
}

/* Navigation container */
.navigation-container {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    border-bottom: 1px solid var(--border-color);
}

/* Thinner nav on desktop */
@media (min-width: 769px) {
    .navigation-container {
        padding: var(--spacing-xs) var(--spacing-md);
    }
}

/* Main content */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: calc(100vh - 300px);
}

/* Two-Pane Layout for Wide Screens */
.app-layout {
    display: block; /* Default: single column */
}

.app-layout__detail {
    display: none; /* Hidden by default (mobile/tablet) */
}

@media (min-width: 1400px) {
    .app-layout {
        display: grid;
        grid-template-columns: 1fr 400px;
        max-width: 1800px;
        margin: 0 auto;
        height: calc(100vh - 140px); /* Account for header */
    }

    .app-layout__list {
        min-width: 0; /* Prevent grid blowout */
        overflow-y: auto;
        height: 100%;
    }

    .app-layout__list .navigation-container {
        position: sticky;
        top: 0;
        z-index: var(--z-sticky);
    }

    .app-layout__list .main-content {
        max-width: none;
        margin: 0;
    }

    .app-layout__detail {
        display: block;
        height: 100%;
        overflow-y: auto;
        border-left: 1px solid var(--border-color);
        background: var(--bg-secondary);
    }
}

/* Site footer */
.site-footer {
    background: var(--bg-overlay);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-2xl);
}

.site-footer__social h2 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.site-footer .social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.site-footer .social-links a {
    color: var(--text-primary);
    font-size: var(--font-size-2xl);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.site-footer .social-links a:hover {
    color: var(--color-primary);
    transform: scale(1.1);
    text-decoration: none;
}

.site-footer__links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.site-footer__copyright {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Floating Action Button Group */
.fab-group {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: var(--z-dropdown);
}

.fab-group__btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: background var(--transition-fast), transform var(--transition-fast), opacity var(--transition-fast);
    font-size: var(--font-size-lg);
}

.fab-group__btn:hover {
    background: var(--color-primary-dark);
    transform: scale(1.1);
}

.fab-group__btn[hidden] {
    display: none;
}

/* Today button - appears above back-to-top */
.fab-group__btn--today {
    background: var(--color-primary);
}

.fab-group__btn--today:hover {
    background: var(--color-primary-dark);
}

/* Back to top button */
.fab-group__btn--top {
    background: var(--color-primary);
}

.fab-group__btn--top:hover {
    background: var(--color-primary-dark);
}

/* Mobile: Show "Today" text next to icon */
@media (max-width: 768px) {
    .fab-group__btn--today {
        width: auto;
        padding: 0 var(--spacing-md);
        border-radius: var(--border-radius-lg);
        gap: var(--spacing-xs);
    }

    .fab-group__btn--today .fab-label {
        display: inline;
    }
}

/* Hide label on desktop */
.fab-group__btn .fab-label {
    display: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

/* Tooltip on hover */
.fab-group__btn {
    position: relative;
}

.fab-group__btn::before {
    content: attr(data-tooltip);
    position: absolute;
    right: 100%;
    margin-right: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-gray-900);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

.fab-group__btn:hover::before {
    opacity: 1;
}

/* Responsive grid utilities */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-cols-1 { grid-template-columns: 1fr; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Responsive breakpoints */
@media (max-width: 1200px) {
    .main-content {
        padding: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .site-header {
        padding: var(--spacing-lg) var(--spacing-xs);
    }

    .site-header__title {
        font-size: var(--font-size-xl);
    }

    .site-header__tagline {
        font-size: var(--font-size-sm);
    }

    .navigation-container {
        padding: var(--spacing-md) var(--spacing-xs);
    }

    .main-content {
        padding: var(--spacing-sm) var(--spacing-xs);
    }

    .site-footer {
        padding: var(--spacing-xl) var(--spacing-xs);
        margin-top: var(--spacing-lg);
    }

    .site-footer__links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    /* Edge-to-edge for index page */
    .page--edge-to-edge .site-header,
    .page--edge-to-edge .navigation-container,
    .page--edge-to-edge .main-content,
    .page--edge-to-edge .site-footer {
        padding-left: 0;
        padding-right: 0;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .site-header__title {
        font-size: var(--font-size-lg);
    }

    .site-header__title i {
        display: none;
    }
}