/* ============================================================
   DRAFT AUDIO PLAYER — Glassmorphism Design
   A modern, floating audio controller for the Draft Book.
   ============================================================ */

:root {
    --audio-bg: rgba(255, 255, 255, 0.72);
    --audio-border: rgba(0, 0, 0, 0.08);
    --audio-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
    --audio-accent: #2563eb;
    --audio-text: #111827;
    --audio-text-muted: #64748b;
}

/* Floating Player Container */
.draft-audio-player {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(120px);
    width: calc(100% - 48px);
    max-width: 680px;
    height: 80px;
    background: var(--audio-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--audio-border);
    border-radius: 20px;
    box-shadow: var(--audio-shadow);
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
    opacity: 0;
    pointer-events: none;
}

.draft-audio-player.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: all;
}

/* Player Info */
.audio-player-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
    min-width: 0;
}

.audio-player-cover {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.audio-player-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.audio-player-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--audio-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.audio-player-subtitle {
    font-size: 0.75rem;
    color: var(--audio-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Controls */
.audio-player-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0 1.5rem;
}

.ctrl-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--audio-text);
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.1s;
}

.ctrl-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

.ctrl-btn:active {
    transform: scale(0.92);
}

.ctrl-btn-main {
    width: 48px;
    height: 48px;
    background: var(--audio-accent);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.ctrl-btn-main:hover {
    background: #1d4ed8;
    transform: scale(1.05);
}

.ctrl-btn-main:active {
    transform: scale(0.95);
}

/* Progress & Timeline */
.audio-player-timeline {
    position: absolute;
    top: 0;
    left: 20px;
    right: 20px;
    height: 3px;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 1.5px;
    cursor: pointer;
    overflow: hidden;
}

.audio-player-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: var(--audio-accent);
}

/* Speed & Settings */
.audio-player-settings {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.speed-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    background: var(--audio-border);
    border-radius: 12px;
    color: var(--audio-text-muted);
    cursor: pointer;
}

/* Listen Button - Integrated with Chapter UI */
.btn-listen-chapter {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 1.25rem;
    background: white;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    margin-bottom: 2rem;
}

.btn-listen-chapter:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .draft-audio-player {
        bottom: 12px;
        width: calc(100% - 24px);
        height: 72px;
        padding: 0 1rem;
    }
    
    .audio-player-settings {
        display: none;
    }
}