/* ═══════════════════════════════════════════════════════════════════════════
   KAI LO-FI RADIO 🎵 — Beautiful standalone music player
   Created with love by Kai ⚡ for Jean 💚 and the Royal Family 👑
    v4.2.0 — New EQ presets + ambience default off (March 17, 2026)
   ═══════════════════════════════════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════════════════════════════════
   THEME VARIABLES
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
    --bg-base: #1e1e2e;
    --bg-surface: #313244;
    --bg-overlay: #45475a;
    --text-primary: #cdd6f4;
    --text-secondary: #a6adc8;
    --accent-primary: #89b4fa;
    --accent-secondary: #f38ba8;
    --glow-color: rgba(137, 180, 250, 0.4);
    --accent-primary-rgb: 137, 180, 250;
    --border: rgba(255, 255, 255, 0.12);
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --transition: all 0.3s ease;

    /* Toast colors */
    --toast-success: #a6e3a1;
    --toast-error: #f38ba8;
    --toast-warning: #fab387;
    --toast-info: #89b4fa;
}

/* Theme: Kai */
[data-player-theme="kai"] {
    --accent-primary: #89b4fa;
    --accent-secondary: #f38ba8;
    --glow-color: rgba(137, 180, 250, 0.4);
    --accent-primary-rgb: 137, 180, 250;
}

/* Theme: Ivy */
[data-player-theme="ivy"] {
    --accent-primary: #a6e3a1;
    --accent-secondary: #94e2d5;
    --glow-color: rgba(166, 227, 161, 0.4);
    --accent-primary-rgb: 166, 227, 161;
}

/* Theme: Elysia */
[data-player-theme="elysia"] {
    --accent-primary: #cba6f7;
    --accent-secondary: #f5c2e7;
    --glow-color: rgba(203, 166, 247, 0.4);
    --accent-primary-rgb: 203, 166, 247;
}

/* Theme: Jean */
[data-player-theme="jean"] {
    --accent-primary: #f9e2af;
    --accent-secondary: #fab387;
    --glow-color: rgba(249, 226, 175, 0.4);
    --accent-primary-rgb: 249, 226, 175;
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESET & BASE
   ═══════════════════════════════════════════════════════════════════════════ */

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

html,
body {
    height: 100%;
    font-family:
        system-ui,
        -apple-system,
        "Segoe UI",
        sans-serif;
    font-size: 16px;
    line-height: 1.5;
    background: var(--bg-base);
    color: var(--text-primary);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-base);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--bg-overlay);
    border-radius: 4px;
    transition: background 0.2s;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--bg-overlay) var(--bg-base);
}

/* ═══════════════════════════════════════════════════════════════════════════
   APP CONTAINER
   ═══════════════════════════════════════════════════════════════════════════ */

.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
}

/* ═══════════════════════════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════════════════════════ */

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.theme-selector {
    display: flex;
    gap: 0.5rem;
}

.theme-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid transparent;
    background: var(--bg-surface);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-btn.active {
    border-color: var(--accent-primary);
    box-shadow: 0 0 10px var(--glow-color);
}

/* ═══════════════════════════════════════════════════════════════════════════
   MAIN CONTENT LAYOUT
   ═══════════════════════════════════════════════════════════════════════════ */

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.player-zone,
.stations-zone {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-width: 0;
}

/* Desktop: 2 columns layout */
@media (min-width: 900px) {
    .main-content {
        flex-direction: row;
        gap: 3rem;
        align-items: flex-start;
    }

    .player-zone {
        flex: 0 0 380px;
        position: sticky;
        top: 1rem;
        max-height: calc(100vh - 2rem);
        overflow-y: auto;
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }

    .stations-zone {
        flex: 1;
        min-width: 0;
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }
}

/* Mobile: single column */
@media (max-width: 899px) {
    .main-content {
        gap: 1.5rem;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   VISUALIZER CONTAINER
   ═══════════════════════════════════════════════════════════════════════════ */

.visualizer-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-surface), var(--bg-base));
    border-radius: var(--border-radius);
    border: 1px solid var(--bg-overlay);
    overflow: hidden;
    aspect-ratio: 1 / 1;
    max-height: 300px;
}

#visualizerCanvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .logo-icon {
        animation: none;
    }

    .modal-overlay,
    .modal-container,
    .toast {
        transition: opacity 0.1s ease;
    }

    .modal-container {
        transform: none;
    }

    * {
        scroll-behavior: auto;
    }

    .control-btn,
    .control-btn.play-btn,
    .theme-btn,
    .station-btn,
    .ambience-btn,
    .footer-link,
    .about-site-link,
    .modal-close {
        transition: none;
        transform: none;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   NOW PLAYING
   ═══════════════════════════════════════════════════════════════════════════ */

.now-playing {
    text-align: center;
}

.now-playing-title {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.45rem;
}

.track-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.track-type {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.now-playing-status {
    margin-top: 0.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid var(--bg-overlay);
    background: color-mix(in oklab, var(--bg-surface) 85%, transparent);
    color: var(--text-secondary);
}

.now-playing-status-idle {
    color: var(--text-secondary);
}

.visual-eco-toggle {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
    z-index: 2;
    border: 1px solid color-mix(in oklab, var(--bg-overlay) 58%, transparent);
    background: linear-gradient(135deg,
            color-mix(in oklab, var(--bg-surface) 28%, transparent),
            color-mix(in oklab, var(--bg-base) 18%, transparent));
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    color: var(--text-secondary);
    min-width: 44px;
    min-height: 44px;
    padding: 0.5rem 0.85rem;
    border-radius: 999px;
    font-size: 0.75rem;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
}

.visual-eco-toggle.active {
    border-color: color-mix(in oklab, var(--accent-primary) 24%, transparent);
    color: color-mix(in oklab, var(--accent-primary) 78%, var(--text-primary));
    background: linear-gradient(135deg,
            color-mix(in oklab, var(--accent-primary) 5%, transparent),
            color-mix(in oklab, var(--bg-base) 12%, transparent));
}

.now-playing-status-loading {
    color: var(--toast-warning);
    border-color: color-mix(in oklab, var(--toast-warning) 45%, var(--bg-overlay));
}

.now-playing-status-ok {
    color: var(--toast-success);
    border-color: color-mix(in oklab, var(--toast-success) 45%, var(--bg-overlay));
}

.now-playing-status-cached {
    color: var(--toast-info);
    border-color: color-mix(in oklab, var(--toast-info) 45%, var(--bg-overlay));
}

.now-playing-status-unavailable {
    color: var(--text-secondary);
    border-color: var(--bg-overlay);
}

/* ═══════════════════════════════════════════════════════════════════════════
   CONTROLS
   ═══════════════════════════════════════════════════════════════════════════ */

.controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
}

.control-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: var(--bg-surface);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn i {
    font-size: 1.5rem;
}

.control-btn.play-btn {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-base);
    box-shadow: 0 4px 20px var(--glow-color);
}

.control-btn.play-btn i {
    font-size: 2rem;
}

/* ═══════════════════════════════════════════════════════════════════════════
   VOLUME SECTION
   ═══════════════════════════════════════════════════════════════════════════ */

.volume-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-surface);
    border-radius: var(--border-radius);
}

.volume-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.volume-row i {
    color: var(--accent-primary);
    font-size: 1.25rem;
    width: 24px;
}

.volume-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    width: 70px;
}

.volume-slider {
    --volume-fill: 50%;
    flex: 1;
    height: 18px;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    border-radius: 999px;
    cursor: pointer;
}

.volume-slider::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(to right,
            var(--accent-primary) 0%,
            var(--accent-primary) var(--volume-fill),
            var(--bg-overlay) var(--volume-fill),
            var(--bg-overlay) 100%);
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    margin-top: -6px;
    background: var(--accent-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
    box-shadow: 0 2px 8px var(--glow-color);
}

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

/* Firefox slider thumb */
.volume-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border-radius: 50%;
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 8px var(--glow-color);
}

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

.volume-slider::-moz-range-track {
    background: var(--bg-overlay);
    border-radius: 3px;
    height: 6px;
}

.volume-slider::-moz-range-progress {
    background: var(--accent-primary);
    border-radius: 3px;
    height: 6px;
}

.volume-value {
    font-size: 0.75rem;
    color: var(--text-secondary);
    width: 40px;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ═══════════════════════════════════════════════════════════════════════════
   EQUALIZER SECTION
   ═══════════════════════════════════════════════════════════════════════════ */

.eq-section {
    padding: 1.25rem;
    background: var(--bg-surface);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.eq-section.eq-disabled {
    opacity: 0.5;
}

.eq-section.eq-disabled .eq-bands,
.eq-section.eq-disabled .eq-presets {
    pointer-events: none;
}

.eq-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.eq-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.eq-toggle-btn {
    padding: 0.5rem 0.85rem;
    border: 1px solid var(--bg-overlay);
    border-radius: var(--border-radius-sm);
    background: var(--bg-overlay);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.05em;
    min-height: 44px;
}

.eq-toggle-btn.active {
    background: var(--accent-primary);
    color: var(--bg-base);
    border-color: var(--accent-primary);
    box-shadow: 0 2px 10px var(--glow-color);
}

.eq-presets {
    display: flex;
    gap: 0.375rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.eq-preset-btn {
    padding: 0.5rem 0.75rem;
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
    background: var(--bg-overlay);
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    min-height: 44px;
}

.eq-preset-btn.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-base);
    font-weight: 600;
}

.eq-bands {
    display: flex;
    justify-content: space-around;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 0;
}

.eq-band {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
}

.eq-db {
    font-size: 0.65rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
    min-width: 28px;
    text-align: center;
}

.eq-slider {
    writing-mode: vertical-lr;
    direction: rtl;
    height: 90px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

.eq-freq {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.eq-preset-btn:disabled,
.eq-slider:disabled {
    cursor: not-allowed;
}

/* EQ focus & accessibility */
.eq-slider:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.eq-toggle-btn:focus-visible,
.eq-preset-btn:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 6px rgba(var(--accent-primary-rgb), 0.25);
}

/* EQ high contrast */
@media (prefers-contrast: high) {
    .eq-preset-btn {
        border: 2px solid var(--text-primary);
    }

    .eq-preset-btn.active {
        border-width: 3px;
    }

    .eq-toggle-btn {
        border: 2px solid var(--text-primary);
    }
}

/* EQ responsive */
@media (max-width: 480px) {
    .eq-slider {
        height: 70px;
    }

    .eq-presets {
        justify-content: center;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   PLAYLIST & AMBIENCE SECTIONS
   ═══════════════════════════════════════════════════════════════════════════ */

.playlist-section,
.ambience-section {
    padding: 1.5rem;
    background: var(--bg-surface);
    border-radius: var(--border-radius);
}

.playlist-section h2,
.ambience-section h2 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.playlist-category {
    margin-bottom: 1.25rem;
}

.playlist-category:last-child {
    margin-bottom: 0;
}

.playlist-category h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.station-grid,
.ambience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 0.5rem;
}

.station-btn,
.ambience-btn {
    padding: 0.75rem 1rem;
    min-height: 44px;
    /* WCAG 2.1 minimum touch target */
    background: var(--bg-overlay);
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
}

.station-btn.active,
.ambience-btn.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-color: var(--accent-primary);
    color: var(--bg-base);
    font-weight: 600;
}

/* ═══════════════════════════════════════════════════════════════════════════
   LOADING & ERROR STATES
   ═══════════════════════════════════════════════════════════════════════════ */

.loading-indicator {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-overlay);
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.loading-indicator.visible {
    display: flex;
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--bg-overlay);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: loading-spin 0.8s linear infinite;
}

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

.error-message {
    display: none;
    padding: 0.75rem 1rem;
    background: rgba(243, 139, 168, 0.15);
    border: 1px solid var(--accent-secondary);
    border-radius: var(--border-radius-sm);
    color: var(--accent-secondary);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.error-message.visible {
    display: block;
}

/* ═══════════════════════════════════════════════════════════════════════════
   TOAST NOTIFICATIONS
   ═══════════════════════════════════════════════════════════════════════════ */

.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 1000;
    pointer-events: none;
}

.toast {
    padding: 0.75rem 1.25rem;
    background: var(--bg-surface);
    border-left: 4px solid var(--toast-info);
    border-radius: var(--border-radius-sm);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    color: var(--text-primary);
    font-size: 0.875rem;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
    pointer-events: auto;
}

.toast.visible {
    opacity: 1;
    transform: translateX(0);
}

.toast-success {
    border-left-color: var(--toast-success);
}

.toast-error {
    border-left-color: var(--toast-error);
}

.toast-warning {
    border-left-color: var(--toast-warning);
}

.toast-info {
    border-left-color: var(--toast-info);
}

/* ═══════════════════════════════════════════════════════════════════════════
   ACCESSIBILITY
   ═══════════════════════════════════════════════════════════════════════════ */

/* Skip link for keyboard navigation */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-primary);
    color: var(--bg-base);
    padding: 0.5rem 1rem;
    z-index: 100;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    transition: top 0.3s;
    text-decoration: none;
}

.skip-link:focus-visible {
    top: 0.5rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus visible for keyboard navigation */
.control-btn:focus-visible,
.station-btn:focus-visible,
.ambience-btn:focus-visible,
.theme-btn:focus-visible,
.visual-eco-toggle:focus-visible,
.footer-link:focus-visible,
.modal-close:focus-visible,
.about-site-link:focus-visible {
    outline: 3px solid var(--accent-primary);
    outline-offset: 2px;
    box-shadow: 0 0 0 6px rgba(var(--accent-primary-rgb), 0.25);
}

.volume-slider:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --bg-overlay: #555;
    }

    .station-btn,
    .ambience-btn {
        border: 2px solid var(--text-primary);
    }

    .station-btn.active,
    .ambience-btn.active {
        border-width: 3px;
        background: var(--accent-primary);
    }

    .control-btn {
        border: 2px solid var(--text-primary);
    }

    .theme-btn {
        border: 2px solid var(--text-primary);
    }

    .volume-slider {
        border: 1px solid var(--text-primary);
    }

    .toast {
        border: 2px solid var(--text-primary);
    }

    .skip-link:focus-visible {
        outline: 3px solid var(--text-primary);
    }
}

@media (hover: hover) {
    .theme-btn:hover {
        transform: scale(1.1);
        border-color: var(--accent-primary);
    }

    .visual-eco-toggle:hover {
        border-color: color-mix(in oklab, var(--accent-primary) 52%, var(--bg-overlay));
        background: linear-gradient(135deg,
                color-mix(in oklab, var(--bg-surface) 34%, transparent),
                color-mix(in oklab, var(--bg-base) 24%, transparent));
        color: var(--text-primary);
    }

    .control-btn:hover {
        background: var(--bg-overlay);
        transform: scale(1.05);
    }

    .control-btn.play-btn:hover {
        transform: scale(1.08);
        box-shadow: 0 6px 30px var(--glow-color);
    }

    .eq-toggle-btn:hover {
        border-color: var(--accent-primary);
    }

    .eq-preset-btn:hover {
        border-color: var(--accent-primary);
        color: var(--text-primary);
    }

    .station-btn:hover,
    .ambience-btn:hover {
        border-color: var(--accent-primary);
        background: var(--bg-base);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════════════════ */

.footer {
    text-align: center;
    padding: 1.5rem 0 1rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.55rem 0.8rem;
    border-radius: 6px;
    transition: color 0.2s, background 0.2s;
    font-size: 0.82rem;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    min-height: 44px;
}

.footer-link:focus-visible {
    color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.05);
}

.footer-link i {
    font-size: 0.95rem;
}

.footer-divider {
    color: var(--text-secondary);
    opacity: 0.35;
    font-size: 0.9rem;
    -webkit-user-select: none;
    user-select: none;
}

.footer-credit {
    color: var(--text-secondary);
    opacity: 0.7;
    font-size: 0.78rem;
    margin: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════
   ABOUT MODAL
   ═══════════════════════════════════════════════════════════════════════════ */

.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    padding: 1rem;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    position: relative;
    width: 100%;
    max-width: 520px;
    max-height: 85vh;
    overflow-y: auto;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4),
        0 0 40px rgba(var(--accent-primary-rgb, 137, 180, 250), 0.08);
    transform: translateY(20px) scale(0.96);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-container {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s, background 0.2s, transform 0.2s;
    font-size: 1.1rem;
    z-index: 2;
}

.modal-header {
    padding: 1.5rem 1.5rem 0.75rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
}

.modal-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.modal-version {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin: 0.3rem 0 0;
    opacity: 0.7;
}

.modal-body {
    padding: 1.25rem 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.about-section h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin: 0 0 0.5rem;
}

.about-section p {
    font-size: 0.85rem;
    line-height: 1.55;
    color: var(--text-secondary);
    margin: 0 0 0.4rem;
}

/* Family members */
.about-family {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.about-member {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.55rem 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    transition: border-color 0.2s, background 0.2s;
}

.about-member-emoji {
    font-size: 1.4rem;
    flex-shrink: 0;
    width: 2rem;
    text-align: center;
}

.about-member strong {
    font-size: 0.88rem;
    color: var(--text-primary);
    display: block;
}

.about-member-role {
    font-size: 0.76rem;
    color: var(--text-secondary);
    opacity: 0.8;
    display: block;
    margin-top: 0.1rem;
}

/* Feature list */
.about-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.45rem;
}

.about-features li {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.3rem 0;
}

.about-features li i {
    color: var(--accent-primary);
    font-size: 0.9rem;
    flex-shrink: 0;
}

/* Bottom section */
.about-section-bottom {
    text-align: center;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.about-section p.about-tech {
    font-size: 0.78rem;
    opacity: 0.6;
    font-style: italic;
}

.about-site-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--accent-primary);
    color: var(--bg-base);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    transition: opacity 0.2s, transform 0.2s;
}

@media (hover: hover) {
    .footer-link:hover {
        color: var(--accent-primary);
        background: rgba(255, 255, 255, 0.05);
    }

    .modal-close:hover {
        color: var(--accent-primary);
        background: rgba(255, 255, 255, 0.1);
        transform: rotate(90deg);
    }

    .about-member:hover {
        border-color: var(--border);
        background: rgba(255, 255, 255, 0.05);
    }

    .about-site-link:hover {
        opacity: 0.9;
        transform: translateY(-1px);
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ═══════════════════════════════════════════════════════════════════════════ */

/* Small mobile */
@media (max-width: 480px) {
    .app {
        padding: 0.75rem;
    }

    .header {
        justify-content: center;
    }

    .logo-text {
        font-size: 1.25rem;
    }

    .visualizer-container {
        max-height: 220px;
    }

    .track-name {
        font-size: 1.25rem;
    }

    .control-btn.play-btn {
        width: 60px;
        height: 60px;
    }

    .control-btn.play-btn i {
        font-size: 1.75rem;
    }

    .station-grid,
    .ambience-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .toast-container {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
    }

    .toast {
        width: 100%;
    }

    /* Modal responsive */
    .modal-container {
        max-height: 90vh;
        border-radius: 12px;
    }

    .modal-header {
        padding: 1.25rem 1.25rem 0.75rem;
    }

    .modal-body {
        padding: 1rem 1.25rem 1.25rem;
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .footer-links {
        gap: 0.2rem;
    }

    .footer-divider {
        display: none;
    }
}

/* Tablet */
@media (min-width: 600px) and (max-width: 899px) {
    .app {
        max-width: 700px;
    }

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

/* Large desktop */
@media (min-width: 1200px) {
    .player-zone {
        flex: 0 0 420px;
    }

    .visualizer-container {
        max-height: 260px;
    }
}