:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252542;
    --bg-card: #1e1e3a;
    --text-primary: #e4e4f0;
    --text-secondary: #a0a0b8;
    --accent-primary: #7b68ee;
    --accent-secondary: #9370db;
    --accent-hover: #8b5cf6;
    --border-color: #2d2d4a;
    --slider-bg: #2a2a4a;
    --slider-fill: #7b68ee;
    --danger: #ef4444;
    --success: #22c55e;
    --nav-height: 64px;
    --header-height: 56px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overscroll-behavior: none;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* =====================
   DESKTOP HEADER
   ===================== */
.header {
    background: var(--bg-secondary);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo-icon {
    font-size: 1.75rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-controls {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.625rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.icon-btn:active {
    transform: translateY(0);
}

.icon-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

/* =====================
   MOBILE HEADER
   ===================== */
.mobile-header {
    display: none;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1rem;
    height: var(--header-height);
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    flex-shrink: 0;
}

.mobile-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.mobile-header-left .logo-icon {
    font-size: 1.375rem;
}

.mobile-header-left h1 {
    font-size: 1.125rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mobile-header-right {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.mobile-timer-chip {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    background: rgba(123, 104, 238, 0.15);
    border: 1px solid rgba(123, 104, 238, 0.35);
    border-radius: 999px;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.mobile-header-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, border-color 0.15s;
}

.mobile-header-btn:active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.mobile-header-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* =====================
   DESKTOP MAIN
   ===================== */
.main {
    flex: 1;
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 2rem;
    padding: 2rem;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

/* Master Controls */
.master-controls {
    background: var(--bg-secondary);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    height: fit-content;
    position: sticky;
    top: 5rem;
}

.master-volume {
    margin-bottom: 2rem;
}

.master-volume label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.master-volume input[type="range"] {
    width: 100%;
    margin-bottom: 0.5rem;
}

#master-volume-value {
    font-size: 0.875rem;
    color: var(--accent-secondary);
    font-weight: 500;
}

/* =====================
   RANGE INPUT STYLING
   ===================== */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--slider-bg);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(123, 104, 238, 0.4);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    background: var(--accent-hover);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(123, 104, 238, 0.4);
}

/* =====================
   PRESETS (DESKTOP)
   ===================== */
.presets-section {
    margin-bottom: 2rem;
}

.presets-section h3,
.saved-mixes h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.presets-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.preset-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    text-align: left;
}

.preset-btn:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.preset-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* =====================
   SAVED MIXES (DESKTOP)
   ===================== */
.saved-mixes {
    margin-bottom: 1.5rem;
}

.saved-mixes-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
    max-height: 200px;
    overflow-y: auto;
}

.empty-state {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-style: italic;
    padding: 1.5rem 1rem;
    text-align: center;
}

.saved-mix-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.saved-mix-item span {
    font-size: 0.875rem;
    color: var(--text-primary);
}

.saved-mix-actions {
    display: flex;
    gap: 0.5rem;
}

.saved-mix-actions button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    font-size: 1rem;
    transition: color 0.2s;
}

.saved-mix-actions button:hover {
    color: var(--accent-primary);
}

.saved-mix-actions .delete-btn:hover {
    color: var(--danger);
}

/* =====================
   BUTTONS
   ===================== */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    opacity: 0.9;
}

/* =====================
   SOUNDS SECTION (DESKTOP)
   ===================== */
.sounds-section {
    background: var(--bg-secondary);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.category-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.category-tab {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.category-tab:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.category-tab.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

/* Sounds Grid (desktop) */
.sounds-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.sound-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.sound-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(123, 104, 238, 0.15);
}

.sound-card.playing {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, var(--bg-card), rgba(123, 104, 238, 0.1));
}

.sound-card.playing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    animation: playingIndicator 2s ease-in-out infinite;
}

@keyframes playingIndicator {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

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

.sound-icon {
    font-size: 1.5rem;
}

.sound-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.sound-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.sound-toggle:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.sound-toggle.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

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

.sound-volume input[type="range"] {
    flex: 1;
}

.volume-value {
    font-size: 0.75rem;
    color: var(--text-secondary);
    min-width: 2.5rem;
    text-align: right;
}

/* =====================
   MODAL
   ===================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 400px;
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
    padding: 0.25rem;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.25rem;
}

/* Timer Modal */
.timer-presets {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.timer-preset {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.timer-preset:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.timer-custom {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

.timer-custom label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.timer-custom input {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.625rem;
    border-radius: 0.375rem;
    width: 80px;
    font-size: 0.875rem;
}

.timer-custom .btn {
    width: auto;
}

.active-timer {
    text-align: center;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.active-timer p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

#timer-countdown {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 1.125rem;
}

.hidden {
    display: none !important;
}

/* Save Mix Modal */
#mix-name {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    font-family: inherit;
}

#mix-name:focus {
    outline: none;
    border-color: var(--accent-primary);
}

#mix-name::placeholder {
    color: var(--text-secondary);
}

/* =====================
   DESKTOP TIMER INDICATOR
   ===================== */
.timer-indicator {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    z-index: 50;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.timer-indicator.hidden {
    display: none;
}

.timer-indicator span {
    color: var(--accent-primary);
    font-weight: 600;
}

/* =====================
   SCROLLBAR
   ===================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

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

/* =====================
   LOADING STATE
   ===================== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--text-secondary);
}

/* =====================
   DESKTOP RESPONSIVE (1024px)
   ===================== */
@media (max-width: 1024px) {
    .main {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .master-controls {
        position: static;
    }
}

/* =====================
   MOBILE LAYOUT (768px and below)
   Hide desktop, show mobile
   ===================== */
@media (max-width: 768px) {
    /* Hide desktop elements */
    .header {
        display: none;
    }

    .main {
        display: none;
    }

    .timer-indicator {
        display: none !important;
    }

    /* Show mobile elements */
    .mobile-header {
        display: flex;
    }

    #app {
        height: 100dvh;
        height: 100vh;
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }

    body {
        overflow: hidden;
        position: fixed;
        width: 100%;
        height: 100%;
    }

    /* ---- Mobile Layout Container ---- */
    .mobile-layout {
        flex: 1;
        overflow: hidden;
        position: relative;
        display: block;
    }

    /* ---- Mobile Pages ---- */
    .mobile-page {
        display: none;
        position: absolute;
        inset: 0;
        bottom: var(--nav-height);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
        padding-bottom: env(safe-area-inset-bottom);
    }

    .mobile-page.active {
        display: block;
    }

    /* ---- Bottom Nav ---- */
    .mobile-bottom-nav {
        display: flex;
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: calc(var(--nav-height) + env(safe-area-inset-bottom));
        padding-bottom: env(safe-area-inset-bottom);
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
        z-index: 50;
        box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.4);
    }

    .mobile-nav-btn {
        flex: 1;
        background: none;
        border: none;
        color: var(--text-secondary);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 4px;
        cursor: pointer;
        transition: color 0.15s;
        padding: 0.5rem 0;
        position: relative;
    }

    .mobile-nav-btn span {
        font-size: 0.625rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.04em;
    }

    .mobile-nav-btn.active {
        color: var(--accent-primary);
    }

    .mobile-nav-btn.active::after {
        content: '';
        position: absolute;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 32px;
        height: 2px;
        background: var(--accent-primary);
        border-radius: 0 0 2px 2px;
    }

    .mobile-nav-btn svg {
        width: 22px;
        height: 22px;
    }

    /* ---- Mobile Sounds Page ---- */
    .mobile-category-scroll {
        position: sticky;
        top: 0;
        z-index: 10;
        background: var(--bg-primary);
        padding: 0.75rem 0.875rem 0.625rem;
        border-bottom: 1px solid var(--border-color);
    }

    .mobile-category-tabs {
        display: flex;
        gap: 0.5rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
        padding-bottom: 2px;
    }

    .mobile-category-tabs::-webkit-scrollbar {
        display: none;
    }

    .mobile-category-tab {
        flex-shrink: 0;
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        padding: 0.4375rem 0.875rem;
        border-radius: 999px;
        cursor: pointer;
        font-size: 0.8125rem;
        font-weight: 500;
        transition: all 0.15s;
        white-space: nowrap;
        display: flex;
        align-items: center;
        gap: 0.3rem;
    }

    .mobile-category-tab.active {
        background: var(--accent-primary);
        border-color: var(--accent-primary);
        color: white;
    }

    /* ---- Mobile Sounds Grid ---- */
    .mobile-sounds-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.625rem;
        padding: 0.875rem;
    }

    /* ---- Mobile Sound Card ---- */
    .mobile-sound-card {
        background: var(--bg-card);
        border: 1.5px solid var(--border-color);
        border-radius: 0.875rem;
        padding: 0.875rem 0.75rem 0.75rem;
        cursor: pointer;
        transition: border-color 0.15s, background 0.15s;
        position: relative;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        user-select: none;
        -webkit-user-select: none;
    }

    .mobile-sound-card.playing {
        border-color: var(--accent-primary);
        background: linear-gradient(160deg, var(--bg-card), rgba(123, 104, 238, 0.12));
    }

    .mobile-sound-card.playing::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 2.5px;
        background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
        animation: playingIndicator 2s ease-in-out infinite;
    }

    .mobile-sound-card-top {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 0.25rem;
    }

    .mobile-sound-emoji {
        font-size: 1.625rem;
        line-height: 1;
        flex-shrink: 0;
    }

    .mobile-sound-play-icon {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        transition: background 0.15s, border-color 0.15s;
    }

    .mobile-sound-card.playing .mobile-sound-play-icon {
        background: var(--accent-primary);
        border-color: var(--accent-primary);
    }

    .mobile-sound-play-icon svg {
        width: 12px;
        height: 12px;
        color: var(--text-secondary);
        transition: color 0.15s;
    }

    .mobile-sound-card.playing .mobile-sound-play-icon svg {
        color: white;
    }

    .mobile-sound-label {
        font-size: 0.8125rem;
        font-weight: 500;
        color: var(--text-primary);
        line-height: 1.3;
        word-break: break-word;
    }

    .mobile-sound-volume {
        display: flex;
        align-items: center;
        gap: 0.4rem;
    }

    .mobile-sound-volume input[type="range"] {
        flex: 1;
        height: 4px;
        min-width: 0;
    }

    .mobile-sound-volume input[type="range"]::-webkit-slider-thumb {
        width: 16px;
        height: 16px;
    }

    .mobile-sound-vol-value {
        font-size: 0.625rem;
        color: var(--text-secondary);
        min-width: 1.75rem;
        text-align: right;
        font-weight: 500;
    }

    .mobile-sound-card.playing .mobile-sound-vol-value {
        color: var(--accent-primary);
    }

    /* ---- Mobile Presets Page ---- */
    .mobile-section-header {
        font-size: 0.6875rem;
        font-weight: 700;
        color: var(--text-secondary);
        text-transform: uppercase;
        letter-spacing: 0.08em;
        padding: 1rem 0.875rem 0.5rem;
    }

    .mobile-presets-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.625rem;
        padding: 0 0.875rem;
    }

    .mobile-preset-card {
        background: var(--bg-card);
        border: 1.5px solid var(--border-color);
        border-radius: 0.875rem;
        padding: 1rem 0.875rem;
        cursor: pointer;
        transition: all 0.15s;
        text-align: left;
        display: flex;
        flex-direction: column;
        gap: 0.25rem;
    }

    .mobile-preset-card:active,
    .mobile-preset-card.active {
        background: rgba(123, 104, 238, 0.15);
        border-color: var(--accent-primary);
    }

    .mobile-preset-name {
        font-size: 0.875rem;
        font-weight: 600;
        color: var(--text-primary);
    }

    .mobile-preset-desc {
        font-size: 0.75rem;
        color: var(--text-secondary);
    }

    /* ---- Mobile Quick Actions ---- */
    .mobile-quick-actions {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.625rem;
        padding: 0 0.875rem;
    }

    .mobile-action-card {
        background: var(--bg-card);
        border: 1.5px solid var(--border-color);
        border-radius: 0.875rem;
        padding: 0.875rem 0.5rem;
        cursor: pointer;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.4rem;
        transition: all 0.15s;
        color: var(--text-primary);
    }

    .mobile-action-card span {
        font-size: 0.6875rem;
        font-weight: 600;
        text-align: center;
        color: var(--text-secondary);
    }

    .mobile-action-card:active {
        background: var(--bg-tertiary);
        border-color: var(--accent-primary);
    }

    .mobile-action-card.active {
        border-color: var(--accent-primary);
        background: rgba(123, 104, 238, 0.15);
    }

    .mobile-action-danger:active {
        border-color: var(--danger);
        background: rgba(239, 68, 68, 0.1);
    }

    /* ---- Mobile Mixes Page ---- */
    .mobile-saved-mixes {
        padding: 0 0.875rem;
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
    }

    .mobile-saved-mix-item {
        display: flex;
        align-items: center;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: 0.75rem;
        padding: 0.875rem 1rem;
        gap: 0.75rem;
    }

    .mobile-saved-mix-name {
        flex: 1;
        font-size: 0.9375rem;
        font-weight: 500;
        color: var(--text-primary);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .mobile-saved-mix-actions {
        display: flex;
        gap: 0.375rem;
        flex-shrink: 0;
    }

    .mobile-saved-mix-btn {
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        width: 36px;
        height: 36px;
        border-radius: 0.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        font-size: 1rem;
        transition: all 0.15s;
    }

    .mobile-saved-mix-btn:active {
        background: var(--accent-primary);
        border-color: var(--accent-primary);
        color: white;
    }

    .mobile-saved-mix-btn.delete-btn:active {
        background: var(--danger);
        border-color: var(--danger);
    }

    .mobile-save-btn {
        margin: 0.875rem;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.875rem;
        font-size: 0.9375rem;
        font-weight: 600;
        border-radius: 0.75rem;
    }

    /* ---- Mobile Controls Drawer ---- */
    .mobile-drawer {
        position: fixed;
        inset: 0;
        z-index: 200;
    }

    .mobile-drawer.hidden {
        display: none !important;
    }

    .mobile-drawer-backdrop {
        position: absolute;
        inset: 0;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(3px);
        -webkit-backdrop-filter: blur(3px);
    }

    .mobile-drawer-panel {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        border-radius: 1.25rem 1.25rem 0 0;
        border-top: 1px solid var(--border-color);
        padding-bottom: env(safe-area-inset-bottom);
        animation: drawerSlideUp 0.22s cubic-bezier(0.32, 0.72, 0, 1);
    }

    @keyframes drawerSlideUp {
        from { transform: translateY(100%); }
        to { transform: translateY(0); }
    }

    .mobile-drawer-handle {
        width: 36px;
        height: 4px;
        background: var(--border-color);
        border-radius: 2px;
        margin: 0.75rem auto 0;
    }

    .mobile-drawer-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.875rem 1.25rem 0.75rem;
    }

    .mobile-drawer-header h3 {
        font-size: 1rem;
        font-weight: 600;
    }

    .mobile-drawer-close {
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        width: 32px;
        height: 32px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.15s;
    }

    .mobile-drawer-close:active {
        background: var(--bg-card);
    }

    .mobile-drawer-body {
        padding: 0 1.25rem 1.5rem;
    }

    .drawer-label {
        display: block;
        font-size: 0.75rem;
        font-weight: 600;
        color: var(--text-secondary);
        text-transform: uppercase;
        letter-spacing: 0.06em;
        margin-bottom: 0.75rem;
    }

    .drawer-volume-row {
        display: flex;
        align-items: center;
        gap: 0.625rem;
    }

    .drawer-volume-row input[type="range"] {
        flex: 1;
        height: 6px;
    }

    .drawer-volume-row input[type="range"]::-webkit-slider-thumb {
        width: 22px;
        height: 22px;
    }

    .drawer-volume-value {
        font-size: 0.875rem;
        font-weight: 600;
        color: var(--accent-primary);
        min-width: 2.5rem;
        text-align: right;
    }

    /* ---- Mobile Modal overrides ---- */
    .modal {
        align-items: flex-end;
        background: rgba(0, 0, 0, 0.75);
    }

    .modal-content {
        width: 100%;
        max-width: none;
        margin: 0;
        max-height: 85vh;
        border-radius: 1.25rem 1.25rem 0 0;
        overflow-y: auto;
        animation: drawerSlideUp 0.22s cubic-bezier(0.32, 0.72, 0, 1);
    }

    .modal-header {
        padding: 1.125rem 1.125rem 1rem;
        position: sticky;
        top: 0;
        background: var(--bg-secondary);
        z-index: 10;
        border-radius: 1.25rem 1.25rem 0 0;
    }

    .modal-header h2 {
        font-size: 1rem;
        font-weight: 600;
    }

    .modal-close {
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        background: var(--bg-tertiary);
        border: 1px solid var(--border-color);
    }

    .modal-body {
        padding: 0.875rem 1.125rem 1.5rem;
        padding-bottom: calc(1.5rem + env(safe-area-inset-bottom));
    }

    .timer-presets {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.625rem;
        margin-bottom: 1.125rem;
    }

    .timer-preset {
        padding: 0.875rem;
        min-height: 54px;
        font-size: 0.9375rem;
        font-weight: 500;
        border-radius: 0.75rem;
    }

    .timer-custom {
        flex-wrap: nowrap;
        gap: 0.625rem;
        margin-bottom: 0;
    }

    .timer-custom label {
        font-size: 0.8125rem;
        white-space: nowrap;
    }

    .timer-custom input {
        flex: 1;
        min-width: 60px;
        max-width: 90px;
        padding: 0.625rem;
        font-size: 0.9375rem;
        border-radius: 0.5rem;
    }

    .timer-custom .btn {
        width: auto;
        padding: 0.625rem 1.125rem;
    }

    .active-timer {
        margin-top: 1rem;
        padding: 1rem;
        border-radius: 0.75rem;
    }

    .active-timer p {
        font-size: 0.9375rem;
        margin-bottom: 0.875rem;
    }

    #mix-name {
        padding: 0.875rem 1rem;
        font-size: 1rem;
        border-radius: 0.625rem;
        margin-bottom: 0.875rem;
    }

    #save-mix-modal .btn-primary {
        min-height: 50px;
        font-size: 1rem;
        font-weight: 600;
        border-radius: 0.75rem;
    }
}