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

:root {
    --color-primary: #A0C4B8;
    --color-primary-dark: #8BB3A7;
    --color-primary-light: #C5E0D8;
    --color-bg: #0a0a0b;
    --color-bg-elevated: #16171a;
    --color-bg-card: #1e1f23;
    --color-text: #e4e4e7;
    --color-text-secondary: #a1a1aa;
    --color-border: #27272a;
    --color-success: #22c55e;
    --color-error: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Audio Page Container
   ============================================ */
.audio-page {
    min-height: 100vh;
    padding: 24px 20px;
}

.audio-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 8px;
}

/* ============================================
   Header
   ============================================ */
.audio-header {
    margin-bottom: 32px;
    text-align: center;
    position: relative;
}

.back-btn {
    position: absolute;
    left: 0;
    top: 0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    color: var(--color-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.back-btn:hover {
    background: var(--color-bg-card);
    border-color: var(--color-primary);
    transform: translateX(-2px);
}

.back-btn svg {
    width: 18px;
    height: 18px;
}

.page-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
}

/* ============================================
   Now Playing Section
   ============================================ */
.now-playing {
    background: linear-gradient(135deg, rgba(160, 196, 184, 0.1), rgba(139, 179, 167, 0.05));
    border: 1px solid rgba(160, 196, 184, 0.2);
    border-radius: 20px;
    padding: 24px;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
}

.now-playing-info {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.now-playing-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.now-playing-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-bg);
}

.now-playing-label {
    font-size: 12px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    margin-bottom: 4px;
}

.now-playing-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
}


/* Mini Player Controls */
.mini-player {
    margin-top: 16px;
}

.mini-progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 16px;
    cursor: pointer;
}

.mini-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 3px;
    width: 0%;
    transition: width 0.1s linear;
}

.mini-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mini-control-btn,
.mini-play-btn {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mini-control-btn:hover,
.mini-play-btn:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.mini-control-btn svg {
    width: 20px;
    height: 20px;
    color: var(--color-text);
}

.mini-play-btn {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.mini-play-btn svg {
    width: 24px;
    height: 24px;
    color: var(--color-bg);
}

.mini-play-btn:hover {
    background: var(--color-primary-dark);
    transform: scale(1.05);
}

.mini-seek-btn {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 40px;
    height: 40px;
}

.mini-seek-btn:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.mini-seek-btn svg {
    width: 20px;
    height: 20px;
    color: var(--color-text);
}

.mini-seek-btn.seek-active {
    animation: seekPulse 0.3s ease-out;
}

@keyframes seekPulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.15);
        background: var(--color-primary);
        border-color: var(--color-primary);
    }
    100% {
        transform: scale(1);
    }
}

.mini-speed-btn {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 10px 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
}

.mini-speed-btn:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.mini-speed-btn .speed-text {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
}

.mini-time {
    margin-left: auto;
    font-size: 13px;
    color: var(--color-text-secondary);
    font-weight: 500;
    font-variant-numeric: tabular-nums;
}

/* ============================================
   Episodes List
   ============================================ */
.episodes-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.episode-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 18px;
    padding: 32px 40px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.episode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.episode-card:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(160, 196, 184, 0.15);
}

.episode-card:hover::before {
    opacity: 1;
}

.episode-card.active {
    background: var(--color-bg-elevated);
    border-color: var(--color-primary);
}

.episode-card.active::before {
    opacity: 1;
}

.episode-card.completed .episode-status {
    opacity: 1;
}

.episode-header {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 16px;
}

.episode-number {
    width: 56px;
    height: 56px;
    background: rgba(160, 196, 184, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    flex-shrink: 0;
}

.episode-info {
    flex: 1;
    min-width: 0;
}

.episode-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
    line-height: 1.4;
}

.episode-description {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.episode-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 16px;
    padding-left: 80px;
}

.episode-duration {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.episode-duration svg {
    width: 16px;
    height: 16px;
}

.episode-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--color-success);
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.episode-status svg {
    width: 16px;
    height: 16px;
}

/* Progress Bar in Episode */
.episode-progress {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 16px;
    margin-left: 80px;
    width: calc(100% - 80px);
}

.episode-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 2px;
    width: 0%;
    transition: width 0.3s ease;
}


/* ============================================
   Disabled State
   ============================================ */
.episode-card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.episode-card.disabled:hover {
    transform: none;
    border-color: var(--color-border);
    box-shadow: none;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 640px) {
    .audio-page {
        padding: 16px 12px;
    }

    .back-btn {
        position: static;
        margin-bottom: 16px;
    }

    .page-title {
        font-size: 24px;
    }

    .page-subtitle {
        font-size: 14px;
    }

    .now-playing {
        padding: 16px;
    }

    .episode-card {
        padding: 24px 20px;
    }

    .episode-header {
        gap: 12px;
    }

    .episode-number {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .episode-title {
        font-size: 16px;
    }

    .episode-description {
        font-size: 13px;
    }

    .episode-meta {
        flex-wrap: wrap;
        padding-left: 0;
    }

    .episode-progress {
        margin-left: 0;
        width: 100%;
    }

    .mini-controls {
        flex-wrap: wrap;
        justify-content: center;
    }

    .mini-speed-btn {
        order: 10;
        margin-left: 8px;
    }

    .mini-time {
        width: auto;
        margin-left: 0;
        margin-top: 8px;
        text-align: center;
        order: 9;
    }
}

/* ============================================
   Animations
   ============================================ */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.episode-card.playing .episode-number {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.episode-card {
    animation: slideIn 0.4s ease-out backwards;
}

.episode-card:nth-child(1) { animation-delay: 0.05s; }
.episode-card:nth-child(2) { animation-delay: 0.1s; }
.episode-card:nth-child(3) { animation-delay: 0.15s; }
.episode-card:nth-child(4) { animation-delay: 0.2s; }
.episode-card:nth-child(5) { animation-delay: 0.25s; }

/* ============================================
   Keyboard Help
   ============================================ */
.keyboard-help-trigger {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    border: none;
    border-radius: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(160, 196, 184, 0.3);
    transition: all 0.3s ease;
    z-index: 100;
}

.keyboard-help-trigger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(160, 196, 184, 0.4);
    background: var(--color-primary-light);
}

.keyboard-help-trigger svg {
    width: 24px;
    height: 24px;
    color: var(--color-bg);
}

.keyboard-help {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 32px;
    max-width: 500px;
    width: 90%;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.keyboard-help.visible {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.keyboard-help::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.keyboard-help.visible::before {
    opacity: 1;
    pointer-events: auto;
}

.keyboard-help-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    color: var(--color-text-secondary);
}

.keyboard-help-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text);
}

.keyboard-help-close svg {
    width: 20px;
    height: 20px;
}

.keyboard-help h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.keyboard-help h3 svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.keyboard-shortcuts {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.shortcut-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    transition: background 0.2s ease;
}

.shortcut-item:hover {
    background: rgba(255, 255, 255, 0.06);
}

.shortcut-item kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, monospace;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.shortcut-item span {
    flex: 1;
    font-size: 14px;
    color: var(--color-text-secondary);
}

@media (max-width: 768px) {
    .keyboard-help-trigger {
        display: none;
    }

    .keyboard-help {
        padding: 24px;
        width: 94%;
    }

    .keyboard-help h3 {
        font-size: 18px;
    }

    .shortcut-item {
        padding: 10px;
    }

    .shortcut-item kbd {
        min-width: 28px;
        height: 28px;
        font-size: 12px;
    }

    .shortcut-item span {
        font-size: 13px;
    }
}
/* ============================================
   Loading State
   ============================================ */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 0.8s linear infinite;
    display: none;
}

/* Loading state for Mini Player Play Button */
.mini-play-btn.loading .play-icon,
.mini-play-btn.loading .pause-icon {
    display: none !important;
}

.mini-play-btn.loading::after {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--color-bg);
    animation: spin 0.8s linear infinite;
    display: block;
}

/* Loading state for Episode Card */
.episode-card.loading {
    cursor: wait;
}

.episode-card.loading .episode-number {
    position: relative;
    /* Make text transparent but keep layout */
    color: transparent !important;
}

.episode-card.loading .episode-number::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin-top: -12px;
    margin-left: -12px;
    border: 2px solid rgba(160, 196, 184, 0.3);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 0.8s linear infinite;
}