/* ===================================================================
   CollaboratingApp Share Player — Premium Dark Theme
   =================================================================== */

:root {
    /* Surfaces */
    --bg: #121217;
    --bg-elevated: #1C1C24;
    --bg-surface: #242430;
    --bg-hover: #2C2C38;
    --bg-deep: #0A0A0F;

    /* Brand */
    --accent: #6B5AFF;
    --accent-light: #8C7AFF;
    --accent-dim: rgba(107, 90, 255, 0.15);
    --accent-glow: rgba(107, 90, 255, 0.25);

    /* Text */
    --text-primary: #FFFFFF;
    --text-secondary: #A6A6B8;
    --text-tertiary: #737385;
    --text-dim: #4A4A5A;

    /* Semantic */
    --success: #33D98C;
    --warning: #FFBF33;
    --error: #FF5A61;

    /* Waveform */
    --wave-played: #6B5AFF;
    --wave-played-end: #8C7AFF;
    --wave-unplayed: #35354A;
    --wave-bg: #0E0E14;

    /* Borders */
    --border: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.12);

    /* Layout */
    --max-width: 720px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
}

/* ===== Reset ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== Loading ===== */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    gap: 16px;
}

.loading-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
}

/* ===== Error ===== */
.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    gap: 12px;
    padding: 24px;
    text-align: center;
}

.error-icon {
    color: var(--text-dim);
    margin-bottom: 8px;
}

.error-container h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.error-container p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    max-width: 320px;
}

/* ===== Password Overlay ===== */
.overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.overlay-card {
    text-align: center;
    max-width: 360px;
    width: 100%;
}

.overlay-icon {
    color: var(--text-dim);
    margin-bottom: 20px;
}

.overlay-card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.overlay-card > p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: 24px;
}

#password-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

#password-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
    text-align: center;
    letter-spacing: 0.1em;
}

#password-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

#password-input::placeholder {
    color: var(--text-dim);
    letter-spacing: 0;
}

.error-text {
    font-size: 0.8125rem;
    color: var(--error);
    margin-top: 8px;
}

/* ===== Main Player ===== */
#player-container {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 48px 24px 24px;
}

.ambient-glow {
    position: fixed;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.4;
    filter: blur(80px);
    z-index: 0;
}

.player-inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: var(--max-width);
    display: flex;
    flex-direction: column;
    gap: 32px;
    flex: 1;
}

/* ===== Track Header ===== */
.track-header {
    text-align: center;
}

.track-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}

.track-meta .label {
    font-size: 0.6875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    display: block;
    margin-bottom: 2px;
}

.track-meta .value {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.track-divider {
    width: 1px;
    height: 28px;
    background: var(--border);
}

.track-title {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.track-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.badge {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 4px 10px;
    border-radius: 999px;
}

.badge-type {
    background: var(--accent-dim);
    color: var(--accent-light);
}

.badge-version {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
}

/* ===== Waveform ===== */
.waveform-section {
    background: var(--bg-deep);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.waveform-wrap {
    position: relative;
    cursor: pointer;
    padding: 0 2px;
}

#waveform-canvas {
    display: block;
    width: 100%;
    height: 140px;
}

.waveform-hover-time {
    position: absolute;
    top: 8px;
    padding: 3px 8px;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--text-primary);
    pointer-events: none;
    transform: translateX(-50%);
    z-index: 2;
}

/* ===== Transport ===== */
.transport {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-top: 1px solid var(--border);
}

.play-button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    box-shadow: 0 2px 12px var(--accent-glow);
}

.play-button:hover {
    transform: scale(1.06);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.play-button:active {
    transform: scale(0.96);
}

.time-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    font-weight: 500;
    white-space: nowrap;
    flex-shrink: 0;
}

.time-current {
    color: var(--text-primary);
}

.time-separator {
    color: var(--text-dim);
    margin: 0 3px;
}

.time-total {
    color: var(--text-tertiary);
}

.transport-spacer {
    flex: 1;
}

/* Volume */
.volume-control {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.volume-button {
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s;
}

.volume-button:hover {
    color: var(--text-primary);
}

.volume-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 72px;
    height: 4px;
    background: var(--bg-surface);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    transition: transform 0.1s;
}

.volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.volume-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    border: none;
}

/* Download */
.download-button {
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s, background 0.15s;
    flex-shrink: 0;
}

.download-button:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.06);
}

/* ===== Comments ===== */
.comments-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-header h2 {
    font-size: 0.9375rem;
    font-weight: 600;
}

.comment-count {
    font-size: 0.6875rem;
    font-weight: 600;
    background: var(--accent-dim);
    color: var(--accent-light);
    padding: 2px 8px;
    border-radius: 999px;
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-height: 400px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--bg-surface) transparent;
}

.comments-list::-webkit-scrollbar {
    width: 4px;
}

.comments-list::-webkit-scrollbar-track {
    background: transparent;
}

.comments-list::-webkit-scrollbar-thumb {
    background: var(--bg-surface);
    border-radius: 2px;
}

/* Single comment */
.comment-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    border: 1px solid transparent;
    transition: border-color 0.15s, background 0.15s;
}

.comment-item:hover {
    border-color: var(--border);
    background: var(--bg-surface);
}

.comment-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent-dim);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--accent-light);
    flex-shrink: 0;
    text-transform: uppercase;
}

.comment-body {
    flex: 1;
    min-width: 0;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.comment-author {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.comment-timestamp {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--accent-light);
    background: var(--accent-dim);
    padding: 1px 6px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.15s;
}

.comment-timestamp:hover {
    background: var(--accent-glow);
}

.comment-date {
    font-size: 0.6875rem;
    color: var(--text-dim);
    margin-left: auto;
    flex-shrink: 0;
}

.comment-text {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
    word-break: break-word;
}

.comments-empty {
    text-align: center;
    padding: 32px 16px;
    color: var(--text-dim);
    font-size: 0.8125rem;
}

/* Comment form */
.comment-form-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    background: var(--bg-elevated);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.comment-form-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.input {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    color: var(--text-primary);
    font-size: 0.8125rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

.input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}

.input::placeholder {
    color: var(--text-dim);
}

#guest-name-input {
    flex: 1;
    min-width: 0;
}

.comment-textarea {
    flex: 1;
    resize: none;
    min-width: 0;
    line-height: 1.5;
}

.timestamp-toggle {
    display: flex;
    align-items: center;
    gap: 0;
    cursor: pointer;
    flex-shrink: 0;
}

.timestamp-toggle input[type="checkbox"] {
    display: none;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--text-dim);
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid var(--border);
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.timestamp-toggle input:checked + .toggle-label {
    color: var(--accent-light);
    border-color: var(--accent);
    background: var(--accent-dim);
}

.toggle-label svg {
    flex-shrink: 0;
}

/* Buttons */
.btn {
    font-family: inherit;
    font-weight: 600;
    font-size: 0.875rem;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 10px 20px;
    transition: transform 0.1s, box-shadow 0.15s, opacity 0.15s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn:active {
    transform: scale(0.97);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-comment {
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

/* ===== Footer ===== */
.player-footer {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: var(--max-width);
    margin-top: 48px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    text-align: center;
    padding-bottom: 24px;
}

.footer-brand {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: opacity 0.15s;
}

.footer-brand:hover {
    opacity: 0.8;
}

.footer-powered {
    font-size: 0.6875rem;
    color: var(--text-dim);
    letter-spacing: 0.03em;
}

.footer-name {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    letter-spacing: 0.01em;
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.player-inner {
    animation: fadeIn 0.4s ease-out;
}

.comment-item {
    animation: fadeIn 0.2s ease-out;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
    #player-container {
        padding: 32px 16px 16px;
    }

    .track-title {
        font-size: 1.375rem;
    }

    .track-meta {
        flex-direction: column;
        gap: 8px;
    }

    .track-divider {
        width: 40px;
        height: 1px;
    }

    #waveform-canvas {
        height: 100px;
    }

    .transport {
        flex-wrap: wrap;
        gap: 8px;
        padding: 10px 12px;
    }

    .volume-control {
        order: 5;
        width: 100%;
        justify-content: center;
        padding-top: 4px;
        border-top: 1px solid var(--border);
    }

    .volume-slider {
        flex: 1;
        max-width: 200px;
    }

    .transport-spacer {
        display: none;
    }

    .download-button {
        margin-left: auto;
    }

    .comment-form-row {
        flex-wrap: wrap;
    }

    #guest-name-input {
        flex: 1 1 120px;
    }

    .ambient-glow {
        width: 300px;
        height: 200px;
        opacity: 0.3;
    }
}

@media (max-width: 380px) {
    .track-title {
        font-size: 1.125rem;
    }

    #waveform-canvas {
        height: 80px;
    }

    .play-button {
        width: 36px;
        height: 36px;
    }

    .play-button svg {
        width: 18px;
        height: 18px;
    }
}