@import url('https://fonts.googleapis.com/css2?family=Crimson+Pro:wght@400;600&family=Inter:wght@400;500&display=swap');

:root {
    /* Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1c1c1c;
    
    --accent-primary: #c5a059; /* Gold */
    --accent-secondary: #8e6d2f;
    --accent-muted: rgba(197, 160, 89, 0.2);
    
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    
    --border-primary: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(197, 160, 89, 0.3);
    
    /* Spacing (4px grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
    --space-8: 32px;
    --space-12: 48px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.25, 1, 0.5, 1);
    --transition-base: 250ms cubic-bezier(0.25, 1, 0.5, 1);
}

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

body {
    background-color: var(--bg-primary);
    background-image: 
        linear-gradient(rgba(10, 10, 10, 0.75), rgba(10, 10, 10, 0.85)),
        url('image/a-oracao-de-sao-miguel-desktop.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, .serif {
    font-family: 'Crimson Pro', serif;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* Layout */
.app-container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-4);
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

header {
    text-align: center;
}

.logo-container img {
    max-height: 60px;
    width: auto;
    opacity: 0.8;
    transition: var(--transition-base);
}

.logo-container img:hover {
    opacity: 1;
}

/* Cover Section */
.cover-section {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    aspect-ratio: 1/1;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
}

#cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

/* Content Info */
.track-info {
    text-align: center;
}

#current {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: var(--space-2);
}

.author-name {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Player Controls */
.player-controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    background-color: rgba(20, 20, 20, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--space-6);
    border-radius: 20px;
    border: 1px solid var(--border-primary);
}

.audio-native {
    width: 100%;
    height: 40px;
}

/* PDF Link */
.resource-link {
    text-align: center;
    margin-top: var(--space-4);
}

.resource-link a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    padding-bottom: 2px;
    border-bottom: 1px solid transparent;
    transition: var(--transition-fast);
}

.resource-link a:hover {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

/* Navigation */
.nav-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
}

.btn-nav {
    flex: 1;
    background: transparent;
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    padding: var(--space-3) var(--space-4);
    border-radius: 10px;
    text-decoration: none;
    font-size: 0.9rem;
    text-align: center;
    transition: var(--transition-fast);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.btn-nav:hover:not([disabled]) {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background-color: var(--accent-muted);
}

/* Playlist Section */
.playlist-section {
    margin-top: var(--space-8);
}

.playlist-title {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-4);
    padding-left: var(--space-2);
}

.playlist-container {
    background-color: rgba(20, 20, 20, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-primary);
    border-radius: 16px;
    overflow: hidden;
}

.track-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.track-item:last-child {
    border-bottom: none;
}

.track-item:hover {
    background-color: var(--accent-muted);
}

.track-item.active {
    background-color: var(--accent-muted);
    border-left: 3px solid var(--accent-primary);
}

.track-item .track-index {
    font-size: 0.75rem;
    color: var(--text-muted);
    width: 20px;
    font-family: monospace;
}

.track-item .track-name {
    font-size: 0.95rem;
    color: var(--text-secondary);
    flex: 1;
}

.track-item.active .track-name {
    color: var(--accent-primary);
    font-weight: 500;
}

.track-item .play-icon {
    font-size: 1.2rem;
    color: var(--accent-primary);
    opacity: 0;
    transition: var(--transition-fast);
}

.track-item:hover .play-icon,
.track-item.active .play-icon {
    opacity: 1;
}

.btn-nav.disabled {
    opacity: 0.3;
    pointer-events: none;
}

/* Footer Badge */
footer {
    padding: var(--space-8);
    text-align: center;
    opacity: 0.6;
}

.artesdosul-badge img {
    height: 12px;
    filter: grayscale(1) brightness(2);
}

/* Github Corner */
.github-corner svg {
    fill: var(--accent-primary);
    color: var(--bg-primary);
}

/* Mobile Adjustments */
@media (max-width: 480px) {
    .app-container {
        padding: var(--space-4);
        gap: var(--space-6);
    }
    
    #current {
        font-size: 1.25rem;
    }
}