@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    --font: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --mono: ui-monospace, 'Cascadia Code', Consolas, monospace;
    --bg: #08080c;
    --surface: rgba(16, 16, 24, 0.78);
    --surface-solid: #12121a;
    --surface-hover: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.09);
    --border-strong: rgba(255, 255, 255, 0.14);
    --text: #f4f4f5;
    --text-muted: rgba(244, 244, 245, 0.58);
    --accent: #f5b942;
    --accent-soft: rgba(245, 185, 66, 0.14);
    --accent-glow: rgba(245, 185, 66, 0.35);
    --pink: #f472b6;
    --green: #4ade80;
    --red: #f87171;
    --cyan: #67e8f9;
    --blur: blur(22px);
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 999px;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.55);
}

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

body {
    margin: 0;
    overflow: hidden;
    background: var(--bg);
    font-family: var(--font);
    color: var(--text);
    touch-action: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

#gameCanvas,
canvas {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    display: block;
    z-index: 0;
}

/* ── Glass surfaces ── */
.glass-panel {
    background: var(--surface);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.panel-head {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.panel-head-actions {
    gap: 10px;
}

.panel-head-actions h2 {
    flex: 1;
}

.panel-icon-btn {
    margin: 0;
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    padding: 0;
    font-size: 1.1rem;
    line-height: 1;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: none;
    text-transform: none;
}

.panel-icon-btn:hover {
    color: var(--text);
    background: var(--surface-hover);
}

.panel-head h2 {
    margin: 0;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.panel-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

/* ── HUD ── */
#ui {
    position: absolute;
    top: 16px;
    left: 16px;
    pointer-events: none;
    z-index: 10;
}

.hud-shell {
    min-width: 120px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    background: var(--surface);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

#scoreDisplay {
    font-size: 2rem;
    font-weight: 800;
    margin: 0;
    line-height: 1;
    letter-spacing: -0.03em;
    color: var(--accent);
}

#liveStatus {
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--green);
    margin: 6px 0 0;
    min-height: 14px;
    letter-spacing: 0.02em;
}

#donutDisplay {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--pink);
    margin: 4px 0 0;
}

#powerupDisplay {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--cyan);
    margin: 4px 0 0;
    min-height: 16px;
}

#multiplierDisplay {
    font-size: 1rem;
    font-weight: 800;
    color: var(--red);
    margin: 6px 0 0;
    opacity: 0;
    transition: opacity 0.2s, transform 0.15s;
}

/* Run HUD only while playing — keeps menu / game-over panels clear */
body.game-menu #ui,
body.game-over #ui {
    display: none !important;
}

#instructions {
    display: none;
}

#howToPlay strong {
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 8px;
}

#howToPlay {
    text-align: left;
    margin: 16px 0 0;
    padding: 14px;
    font-size: 0.8rem;
    line-height: 1.55;
    color: var(--text-muted);
    background: var(--surface-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

#howToPlay b { color: var(--text); font-weight: 600; }

/* ── Audio controls ── */
#audioPanel {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 12;
    width: min(220px, calc(100vw - 32px));
    padding: 10px 12px;
    pointer-events: auto;
    touch-action: manipulation;
    border-radius: var(--radius-md);
}

.vol-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.vol-row + .vol-row {
    margin-top: 8px;
}

.vol-row span {
    flex: 0 0 42px;
}

input[type="range"] {
    flex: 1;
    min-width: 0;
    height: 4px;
    margin: 0;
    accent-color: var(--accent);
    cursor: pointer;
    touch-action: manipulation;
}

input[type="range"]::-webkit-slider-thumb {
    width: 14px;
    height: 14px;
}

/* ── Buttons & inputs ── */
button {
    font-family: var(--font);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease, opacity 0.12s;
    pointer-events: auto;
}

button:active { transform: scale(0.97); }

.btn-primary,
#startBtn,
#roadmapDismissBtn {
    margin-top: 16px;
    padding: 14px 24px;
    width: 100%;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #1a1208;
    background: linear-gradient(135deg, #fcd34d 0%, var(--accent) 50%, #e89b2a 100%);
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-primary:hover,
#startBtn:hover,
#roadmapDismissBtn:hover {
    box-shadow: 0 6px 28px rgba(245, 185, 66, 0.5);
    transform: translateY(-1px);
}

.btn-ghost,
#usernameBtn,
#chatSendBtn {
    margin-top: 0;
    padding: 10px 16px;
    font-size: 0.82rem;
    color: var(--text);
    background: var(--surface-hover);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
}

input[type="text"],
#chatForm input,
#usernameRow input {
    flex: 1;
    padding: 11px 14px;
    font-family: var(--font);
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus {
    border-color: rgba(245, 185, 66, 0.45);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

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

input:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

/* ── Start screen ── */
#startScreen {
    position: absolute;
    top: 50%;
    left: max(16px, env(safe-area-inset-left));
    transform: translateY(-50%);
    width: min(340px, calc(100vw - 340px));
    max-width: 340px;
    padding: 22px 22px 20px;
    text-align: center;
    z-index: 20;
    border-radius: var(--radius-lg);
    pointer-events: auto;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-bottom: 12px;
    font-size: 1.4rem;
    background: var(--accent-soft);
    border: 1px solid rgba(245, 185, 66, 0.25);
    border-radius: var(--radius-md);
}

#startScreen h1 {
    margin: 0 0 6px;
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text);
}

.menu-tagline {
    margin: 0;
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.45;
}

#usernameRow {
    display: flex;
    gap: 8px;
    margin: 18px 0 0;
}

#usernameStatus {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 8px 0 0;
    line-height: 1.4;
}

body.game-playing #startScreen { display: none !important; }
body.game-over #startScreen { display: none !important; }

/* ── Game over ── */
#gameOver {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(380px, 92vw);
    padding: 32px 28px;
    text-align: center;
    z-index: 40;
    border-radius: var(--radius-lg);
}

#gameOver h1 {
    margin: 0 0 8px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--red);
    letter-spacing: -0.02em;
}

.final-score {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-muted);
    margin: 0 0 8px;
}

body.game-over #gameOver { display: block !important; }

/* ── Side panels (desktop) ── */
.menu-panel {
    position: absolute;
    z-index: 20;
    pointer-events: auto;
    padding: 18px;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
}

#leaderboardPanel {
    top: 16px;
    right: 16px;
    width: min(280px, 28vw);
    max-height: 52vh;
    overflow: hidden;
}

#leaderboardList {
    margin: 0;
    padding: 0;
    list-style: none;
    overflow-y: auto;
    flex: 1;
}

#leaderboardList li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    margin-bottom: 4px;
    font-size: 0.82rem;
    background: var(--surface-hover);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
}

#leaderboardList li:first-child {
    border-color: rgba(245, 185, 66, 0.25);
    background: var(--accent-soft);
}

#leaderboardList .lb-name { color: var(--text); font-weight: 500; }
#leaderboardList .lb-score { color: var(--accent); font-weight: 700; }
#leaderboardEmpty { font-size: 0.82rem; color: var(--text-muted); margin: 0; }

#chatPanel {
    bottom: 16px;
    right: 16px;
    width: min(320px, 30vw);
    height: 260px;
}

#chatMessages {
    flex: 1;
    overflow-y: auto;
    font-size: 0.8rem;
    line-height: 1.5;
    margin-bottom: 10px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

#chatMessages .chat-line { margin-bottom: 6px; word-break: break-word; }
#chatMessages .chat-user { color: var(--accent); font-weight: 600; }

#chatForm { display: flex; gap: 8px; }

.panel-note {
    font-size: 0.68rem;
    color: var(--text-muted);
    margin: 8px 0 0;
}

#shopPanel {
    bottom: 16px;
    left: 16px;
    width: min(300px, 28vw);
    max-height: 44vh;
}

#shopPanelBody {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.dock-chip {
    display: none;
    position: fixed;
    z-index: 25;
    margin: 0;
    padding: 10px 16px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
    background: var(--surface);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow);
    pointer-events: auto;
}

.shop-dock {
    bottom: 16px;
    left: 16px;
}

.chat-bubble {
    display: none;
    position: fixed;
    bottom: 16px;
    right: 16px;
    z-index: 25;
    width: 52px;
    height: 52px;
    margin: 0;
    padding: 0;
    font-size: 1.35rem;
    line-height: 1;
    color: var(--text);
    background: var(--surface);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    box-shadow: var(--shadow);
    pointer-events: auto;
    align-items: center;
    justify-content: center;
}

.chat-bubble-icon {
    display: block;
    line-height: 1;
}

.chat-unread-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    font-size: 0.62rem;
    font-weight: 800;
    line-height: 18px;
    text-align: center;
    color: #1a1208;
    background: var(--accent);
    border: 2px solid var(--surface-solid);
    border-radius: var(--radius-full);
    pointer-events: none;
}

.chat-bubble.has-unread {
    box-shadow: 0 0 0 2px var(--accent-glow), var(--shadow);
}

#shopBalance {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--pink);
    margin: 0 0 4px;
}

#shopHint {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin: 0 0 12px;
    line-height: 1.4;
}

.shop-tabs {
    display: flex;
    gap: 6px;
    padding: 4px;
    margin-bottom: 12px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
}

.shop-tab {
    flex: 1;
    margin: 0;
    padding: 8px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-radius: 8px;
    box-shadow: none;
    text-transform: none;
}

.shop-tab.active {
    color: var(--text);
    background: var(--surface-hover);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.shop-list {
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#shopPanel .shop-list {
    flex: 1;
    min-height: 0;
}

.shop-item {
    padding: 10px 12px;
    background: var(--surface-hover);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color 0.15s;
}

.shop-item.equipped {
    border-color: rgba(245, 185, 66, 0.4);
    background: var(--accent-soft);
}

.shop-item-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    font-size: 0.82rem;
    font-weight: 500;
}

.shop-cost { font-size: 0.75rem; color: var(--pink); font-weight: 600; }
.shop-item-actions { display: flex; justify-content: flex-end; }

.shop-btn {
    margin: 0;
    padding: 6px 12px;
    font-size: 0.72rem;
    color: var(--text);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    box-shadow: none;
    text-transform: none;
}

.shop-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.shop-equipped, .shop-muted { font-size: 0.72rem; color: var(--text-muted); }

.tag-preview { font-weight: 600; }

.tag-rainbow {
    background: linear-gradient(90deg, #f87171, #fcd34d, #4ade80, #67e8f9, #f472b6, #f87171);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rainbowTag 2.5s linear infinite;
}

@keyframes rainbowTag { to { background-position: 200% center; } }
.chat-user.tag-rainbow { -webkit-text-fill-color: transparent; }

#loadingMsg {
    position: fixed;
    bottom: 16px;
    right: 16px;
    z-index: 5;
    padding: 6px 12px;
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    backdrop-filter: var(--blur);
}

/* ── Mobile controls ── */
#mobileControls {
    display: none;
    position: fixed;
    bottom: max(16px, env(safe-area-inset-bottom));
    left: 16px;
    right: 16px;
    z-index: 50;
    pointer-events: auto;
    touch-action: manipulation;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

#mobileControls button {
    width: 72px;
    height: 72px;
    margin: 0;
    padding: 0;
    font-size: 1.35rem;
    color: var(--text);
    background: var(--surface);
    backdrop-filter: var(--blur);
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    box-shadow: var(--shadow);
}

#mobileControls button.active {
    background: var(--accent-soft);
    border-color: rgba(245, 185, 66, 0.45);
    color: var(--accent);
}

#jumpBtn {
    width: 84px;
    height: 84px;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    color: #1a1208;
    background: linear-gradient(135deg, #fcd34d, var(--accent));
    border: none;
    box-shadow: 0 8px 28px var(--accent-glow);
}

#mobileMenuNav {
    display: none;
    position: fixed;
    bottom: max(12px, env(safe-area-inset-bottom));
    left: 12px;
    right: 12px;
    z-index: 30;
    padding: 6px;
    gap: 4px;
    background: var(--surface);
    backdrop-filter: var(--blur);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    pointer-events: auto;
}

#mobileMenuNav .menu-nav-btn {
    flex: 1;
    position: relative;
    margin: 0;
    padding: 10px 4px;
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    box-shadow: none;
    text-transform: none;
}

.nav-unread-badge {
    position: absolute;
    top: 4px;
    right: 50%;
    transform: translateX(18px);
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    font-size: 0.58rem;
    font-weight: 800;
    line-height: 16px;
    text-align: center;
    color: #1a1208;
    background: var(--accent);
    border: 1.5px solid var(--surface-solid);
    border-radius: var(--radius-full);
    pointer-events: none;
}

#mobileMenuNav .menu-nav-btn.has-unread {
    color: var(--text);
}

#mobileMenuNav .menu-nav-btn.active {
    color: var(--text);
    background: var(--accent-soft);
}

#mobileTouchHint { display: none !important; }

/* ── Roadmap popup ── */
#roadmapPopup {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
    background: rgba(4, 4, 8, 0.72);
    backdrop-filter: blur(8px);
    pointer-events: auto;
}

#roadmapPopup.open { display: flex; }

.roadmap-card {
    width: min(440px, 100%);
    max-height: min(88vh, 540px);
    overflow-y: auto;
    padding: 24px;
    text-align: left;
    border-radius: var(--radius-lg);
    background: var(--surface-solid);
    border: 1px solid var(--border-strong);
    box-shadow: var(--shadow-lg);
}

.roadmap-badge {
    display: inline-block;
    margin: 0 0 12px;
    padding: 5px 12px;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-soft);
    border-radius: var(--radius-full);
}

.roadmap-card h2 {
    margin: 0 0 14px;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
}

.roadmap-list {
    margin: 0 0 16px;
    padding-left: 18px;
    font-size: 0.88rem;
    line-height: 1.55;
    color: var(--text-muted);
}

.roadmap-list li { margin-bottom: 8px; }

.roadmap-note {
    margin: 0 0 16px;
    padding: 12px 14px;
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--text-muted);
    background: rgba(244, 114, 182, 0.08);
    border: 1px solid rgba(244, 114, 182, 0.2);
    border-radius: var(--radius-sm);
}

.roadmap-note strong { color: var(--pink); }

.roadmap-ca-row {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

#roadmapCaText {
    flex: 1;
    min-width: 0;
    padding: 11px 12px;
    font-family: var(--mono);
    font-size: 0.68rem;
    line-height: 1.4;
    word-break: break-all;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

#roadmapCopyCaBtn {
    margin: 0;
    padding: 10px 14px;
    font-size: 0.78rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.roadmap-copy-status {
    min-height: 18px;
    margin: 0 0 12px;
    font-size: 0.75rem;
    color: var(--green);
}

#roadmapDismissBtn { margin-top: 4px; }

/* ── Mobile layout ── */
@media (max-width: 900px) {
    body { padding: 0; }

    #loadingMsg { display: none !important; }

    #audioPanel {
        top: max(8px, env(safe-area-inset-top));
        left: auto;
        right: 8px;
        transform: none;
        width: min(136px, 38vw);
        padding: 8px 10px;
    }

    .vol-row {
        font-size: 0.62rem;
        gap: 6px;
    }

    .vol-row span {
        flex-basis: 36px;
    }

    body.game-playing #audioPanel {
        top: max(8px, env(safe-area-inset-top));
        right: 8px;
    }

    #startScreen {
        position: fixed;
        top: env(safe-area-inset-top, 0);
        left: 0;
        right: 0;
        bottom: auto;
        max-height: min(38vh, 320px);
        display: flex;
        flex-direction: column;
        transform: none;
        width: auto;
        max-width: none;
        border-radius: 0;
        border-left: none;
        border-right: none;
        border-top: none;
        border-bottom: 1px solid var(--border);
        overflow: hidden;
        touch-action: pan-y;
        padding: 12px 16px 14px;
    }

    #howToPlay {
        display: none;
    }

    #startScreen h1 {
        font-size: 1.25rem;
        margin-bottom: 2px;
    }

    .menu-tagline {
        font-size: 0.78rem;
        line-height: 1.35;
    }

    .brand-mark {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
        margin-bottom: 6px;
    }

    #usernameRow {
        margin-top: 10px;
    }

    #usernameStatus {
        margin-top: 6px;
        font-size: 0.7rem;
    }

    #startBtn {
        position: static;
        width: 100%;
        margin-top: 10px;
        flex-shrink: 0;
    }

    #chatBubble,
    #shopExpandBtn { display: none !important; }

    #shopCollapseBtn { display: none; }

    .menu-panel { display: none !important; }

    body.game-menu #mobileMenuNav { display: flex; }

    body.game-menu:not(.panel-leaderboard):not(.panel-chat):not(.panel-shop) #startScreen {
        display: block;
    }

    body.game-menu.panel-leaderboard #startScreen,
    body.game-menu.panel-chat #startScreen,
    body.game-menu.panel-shop #startScreen {
        display: none !important;
    }

    body.game-menu #usernameRow { flex-direction: column; }
    body.game-menu #usernameRow button { width: 100%; }

    body.game-menu.panel-leaderboard #leaderboardPanel,
    body.game-menu.panel-chat #chatPanel,
    body.game-menu.panel-shop #shopPanel {
        display: flex !important;
        position: fixed;
        top: env(safe-area-inset-top, 0);
        left: 0;
        right: 0;
        bottom: calc(68px + env(safe-area-inset-bottom, 0));
        width: auto;
        max-height: none;
        padding: 20px;
        border-radius: 0;
        border: none;
        border-top: 1px solid var(--border);
    }

    body.game-playing #startScreen,
    body.game-playing #mobileMenuNav,
    body.game-playing .menu-panel,
    body.game-playing #gameOver {
        display: none !important;
    }

    body.game-playing #mobileControls { display: flex; }

    body.game-playing #ui {
        position: fixed;
        top: max(8px, env(safe-area-inset-top));
        left: 10px;
    }

    body.game-playing .hud-shell {
        padding: 8px 12px;
        border-radius: var(--radius-sm);
    }

    body.game-playing #scoreDisplay { font-size: 1.35rem; }
    body.game-playing #donutDisplay { font-size: 0.68rem; }
    body.game-playing #powerupDisplay { font-size: 0.65rem; min-height: 12px; }
    body.game-playing #liveStatus { font-size: 0.62rem; }

    body.game-over #mobileControls,
    body.game-over #mobileMenuNav { display: none !important; }

    body.game-over #gameOver {
        display: block !important;
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: calc(100% - 32px);
        max-width: 360px;
    }

    body.game-over .menu-panel,
    body.game-over #startScreen { display: none !important; }
}

@media (min-width: 901px) {
    #mobileMenuNav,
    #mobileControls { display: none !important; }

    body.game-menu #startScreen {
        top: max(16px, env(safe-area-inset-top));
        bottom: auto;
        transform: none;
        max-height: calc(100vh - 32px);
        overflow-y: auto;
    }

    body.game-menu:not(.shop-collapsed) #startScreen {
        max-height: calc(100vh - min(36vh, 340px) - 48px);
    }

    body.game-menu:not(.shop-collapsed) #shopPanel { display: flex; }

    body.game-menu.shop-collapsed #shopExpandBtn { display: flex; }

    #shopPanel {
        max-height: min(36vh, 340px);
    }

    body:not(.chat-open) #chatPanel { display: none !important; }

    body.chat-open #chatPanel { display: flex !important; }

    body:not(.chat-open) #chatBubble {
        display: flex;
    }

    body.chat-open #chatBubble { display: none !important; }

    body.game-playing #leaderboardPanel { opacity: 0.92; }

    body.game-playing.chat-open #chatPanel { opacity: 0.92; }
}

@media (hover: hover) {
    button:hover { filter: brightness(1.05); }
    #leaderboardList li:hover { border-color: var(--border-strong); }
    .shop-item:hover { border-color: var(--border-strong); }
}