:root {
    --bg-0: #10131c;
    --bg-1: #1a1f2e;
    --panel: #232a3d;
    --panel-2: #2c344b;
    --accent: #ffb454;
    --accent-2: #ff8a3d;
    --good: #5ad67d;
    --bad: #ff6b6b;
    --text: #eef2ff;
    --muted: #9aa4c0;
    --radius: 16px;
    --shadow: 0 12px 40px rgba(0,0,0,.45);
    --sat: env(safe-area-inset-top, 0px);
    --sab: env(safe-area-inset-bottom, 0px);
    --sal: env(safe-area-inset-left, 0px);
    --sar: env(safe-area-inset-right, 0px);
    --hud-top-offset: 10px;
    --hud-block-height: 108px;
    font-family: "Segoe UI", "Helvetica Neue", system-ui, -apple-system, sans-serif;
}

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

html, body {
    height: 100%;
    background: var(--bg-0);
    color: var(--text);
    overflow: hidden;
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

#app {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---------- SCREENS ---------- */
.screen {
    position: absolute;
    inset: 0;
    display: none;
}
.screen.active { display: block; }

/* ---------- MAIN MENU ---------- */
.menu-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(1200px 600px at 80% -10%, rgba(255,180,84,.20), transparent 60%),
        radial-gradient(900px 500px at 10% 110%, rgba(90,214,125,.15), transparent 55%),
        linear-gradient(160deg, #1a2030, #0d1018);
}
.menu-bg::after {
    content: "🐾";
    position: absolute;
    inset: 0;
    font-size: 42px;
    opacity: .05;
    background-image: none;
    letter-spacing: 60px;
    line-height: 120px;
    word-spacing: 30px;
    overflow: hidden;
    padding: 20px;
}
.menu-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
}
.game-title {
    font-size: clamp(42px, 9vw, 84px);
    font-weight: 900;
    line-height: .95;
    letter-spacing: -2px;
    text-shadow: 0 8px 30px rgba(0,0,0,.5);
}
.game-title span {
    display: block;
    color: var(--accent);
}
.subtitle {
    margin: 18px 0 40px;
    color: var(--muted);
    font-size: clamp(14px, 3.5vw, 18px);
    max-width: 460px;
}

/* ---------- BUTTONS ---------- */
.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 14px;
    width: min(320px, 82vw);
}
.btn {
    appearance: none;
    border: none;
    cursor: pointer;
    font-size: 18px;
    font-weight: 700;
    padding: 15px 22px;
    border-radius: 14px;
    background: var(--panel-2);
    color: var(--text);
    transition: transform .08s ease, filter .15s ease, background .15s ease;
    box-shadow: 0 6px 18px rgba(0,0,0,.3);
}
.btn:hover { filter: brightness(1.12); }
.btn:active { transform: translateY(2px) scale(.99); }
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #26170a;
}
.btn-ghost { background: transparent; box-shadow: none; color: var(--muted); }
.btn-ghost:hover { color: var(--text); }
.btn-danger { background: linear-gradient(135deg, #ff6b6b, #d63d3d); }

/* ---------- GAME SCREEN ---------- */
#screen-game { background: #0b1020; }
#game-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

/* HUD */
.hud-top {
    position: absolute;
    top: calc(var(--sat) + var(--hud-top-offset));
    left: 0; right: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px max(16px, var(--sar)) 0 max(16px, var(--sal));
    z-index: 5;
    pointer-events: none;
}
.hud-row {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    pointer-events: none;
}
.hud-row > * { pointer-events: auto; }
.hud-row-stats {
    justify-content: flex-start;
    flex-wrap: wrap;
}
.hud-row-actions {
    justify-content: flex-end;
}
.hud-stat {
    display: flex;
    align-items: center;
    gap: 7px;
    background: rgba(18, 24, 40, .92);
    backdrop-filter: blur(8px);
    padding: 9px 14px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 15px;
    border: 1px solid rgba(255,255,255,.18);
    box-shadow: 0 4px 14px rgba(0,0,0,.35);
}
.hud-stat .ico { font-size: 17px; }
.hud-stat.coins { color: var(--accent); }
.hud-icon-btn {
    width: 46px; height: 46px;
    border: none;
    border-radius: 12px;
    background: rgba(18, 24, 40, .92);
    backdrop-filter: blur(8px);
    color: var(--text);
    font-size: 20px;
    cursor: pointer;
    border: 1px solid rgba(255,255,255,.18);
    box-shadow: 0 4px 14px rgba(0,0,0,.35);
}
.hud-icon-btn:active { transform: scale(.94); }

.level-progress {
    position: absolute;
    top: calc(var(--sat) + var(--hud-top-offset) + var(--hud-block-height));
    left: max(16px, var(--sal));
    right: max(16px, var(--sar));
    height: 8px;
    background: rgba(0,0,0,.45);
    border-radius: 99px;
    z-index: 5;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.12);
}
#level-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--good), var(--accent));
    border-radius: 99px;
    transition: width .3s ease;
}

.action-hint {
    position: absolute;
    bottom: calc(28px + var(--sab));
    left: 50%;
    transform: translateX(-50%);
    background: rgba(18, 24, 40, .95);
    padding: 12px 20px;
    border-radius: 14px;
    font-weight: 700;
    z-index: 6;
    border: 2px solid var(--accent);
    box-shadow: var(--shadow);
    white-space: nowrap;
    color: #fff;
}
.action-hint .kbd { margin-right: 8px; }

/* ---------- TOUCH CONTROLS ---------- */
.touch-controls {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    display: none;
    justify-content: space-between;
    align-items: flex-end;
    padding: 20px;
    padding-bottom: calc(20px + var(--sab));
    padding-left: calc(20px + var(--sal));
    padding-right: calc(20px + var(--sar));
    z-index: 5;
    pointer-events: none;
}
.touch-controls > * { pointer-events: auto; }
.dpad {
    position: relative;
    width: 168px;
    height: 168px;
}
.dpad-btn {
    position: absolute;
    width: 56px; height: 56px;
    border: none;
    border-radius: 14px;
    background: rgba(25, 32, 52, .92);
    color: #fff;
    font-size: 18px;
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255,255,255,.2);
    box-shadow: 0 4px 12px rgba(0,0,0,.35);
}
.dpad-btn:active { background: var(--accent); color: #26170a; }
.dpad-btn.up { top: 0; left: 56px; }
.dpad-btn.left { top: 56px; left: 0; }
.dpad-btn.right { top: 56px; right: 0; }
.dpad-btn.down { top: 112px; left: 56px; }
.action-btn {
    width: 100px; height: 100px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #26170a;
    font-weight: 800;
    font-size: 15px;
    box-shadow: var(--shadow);
}
.action-btn:active { transform: scale(.93); }

body.touch .touch-controls { display: flex; }

/* ---------- OVERLAYS / MODALS ---------- */
.overlay {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(6,9,17,.72);
    backdrop-filter: blur(6px);
    padding: 20px;
}
.overlay.hidden, .hidden { display: none !important; }
.modal {
    background: var(--panel);
    border-radius: var(--radius);
    padding: 26px;
    width: min(420px, 92vw);
    box-shadow: var(--shadow);
    border: 1px solid rgba(255,255,255,.07);
    max-height: 90vh;
    overflow-y: auto;
    animation: pop .18s ease;
}
.modal-wide { width: min(720px, 94vw); }
@keyframes pop { from { transform: scale(.94); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal h2 { font-size: 26px; margin-bottom: 18px; }
.modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
}
.modal-head h2 { margin: 0; }
.close-btn {
    width: 38px; height: 38px;
    border: none;
    border-radius: 10px;
    background: var(--panel-2);
    color: var(--text);
    font-size: 16px;
    cursor: pointer;
}

/* ---------- SHELTER ---------- */
.shelter-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.room-list { display: flex; flex-direction: column; gap: 10px; }
.room-card {
    background: var(--panel-2);
    border-radius: 12px;
    padding: 13px 15px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color .12s;
}
.room-card:hover { border-color: rgba(255,255,255,.12); }
.room-card.selected { border-color: var(--accent); }
.room-card.locked { opacity: .6; }
.room-card .room-name { font-weight: 800; display: flex; justify-content: space-between; align-items: center; }
.room-card .lock-tag { font-size: 12px; color: var(--muted); font-weight: 600; }
.room-card .room-meta { font-size: 13px; color: var(--muted); margin-top: 6px; display: flex; gap: 14px; }
.clean-bar {
    height: 6px;
    background: rgba(255,255,255,.1);
    border-radius: 99px;
    margin-top: 9px;
    overflow: hidden;
}
.clean-bar > i {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--good), var(--accent));
    border-radius: 99px;
}
.room-detail {
    background: var(--panel-2);
    border-radius: 12px;
    padding: 18px;
    min-height: 220px;
}
.room-detail-empty { color: var(--muted); text-align: center; margin-top: 60px; }
.room-detail h3 { font-size: 20px; margin-bottom: 12px; }
.room-detail .detail-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.06); font-size: 14px; }
.room-detail .detail-row b { color: var(--accent); }
.room-detail .unlock-note { font-size: 13px; color: var(--muted); margin: 14px 0; }

/* ---------- RESULTS ---------- */
.results-grid { margin: 8px 0 22px; }
.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 13px 4px;
    border-bottom: 1px solid rgba(255,255,255,.07);
    font-size: 16px;
}
.result-row b { font-size: 20px; color: var(--accent); }

/* ---------- RULES ---------- */
.rules-body { line-height: 1.6; }
.rules-body h3 { margin: 18px 0 8px; color: var(--accent); font-size: 17px; }
.rules-body ul { padding-left: 4px; list-style: none; }
.rules-body li { margin: 8px 0; }
.rules-body p { color: var(--muted); }
.keys { display: flex; flex-direction: column; gap: 10px; }
.key-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.key-row > span:last-child { color: var(--muted); margin-left: 6px; }
.kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 34px;
    height: 34px;
    padding: 0 8px;
    background: var(--panel-2);
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,.12);
    border-bottom-width: 3px;
    font-weight: 800;
    font-size: 14px;
}

/* ---------- SETTINGS ---------- */
.settings-body { display: flex; flex-direction: column; gap: 16px; margin-bottom: 22px; }
.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--panel-2);
    padding: 14px 16px;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
    position: relative;
}
.toggle { position: absolute; opacity: 0; pointer-events: none; }
.toggle-track {
    width: 52px; height: 30px;
    border-radius: 99px;
    background: rgba(255,255,255,.15);
    position: relative;
    transition: background .18s;
    flex: none;
}
.toggle-track::after {
    content: "";
    position: absolute;
    top: 3px; left: 3px;
    width: 24px; height: 24px;
    border-radius: 50%;
    background: #fff;
    transition: transform .18s;
}
.toggle:checked ~ .toggle-track { background: var(--good); }
.toggle:checked ~ .toggle-track::after { transform: translateX(22px); }

/* ---------- TOAST ---------- */
#toast-wrap {
    position: absolute;
    top: calc(var(--sat) + var(--hud-top-offset) + var(--hud-block-height) + 16px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 30;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
    pointer-events: none;
}
.toast {
    background: rgba(20,25,40,.92);
    padding: 10px 18px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 14px;
    border: 1px solid var(--accent);
    box-shadow: var(--shadow);
    animation: toastIn .25s ease, toastOut .3s ease 1.4s forwards;
}
@keyframes toastIn { from { transform: translateY(-14px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes toastOut { to { transform: translateY(-14px); opacity: 0; } }

@media (max-width: 560px) {
    .shelter-layout { grid-template-columns: 1fr; }
    .modal h2 { font-size: 22px; }
}