/* ── Layout ──────────────────────────────────────────────── */

#game-container {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
}

#game-container canvas { display: block; }

#menu-layer {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: var(--bg);
    overflow: hidden;
}

#node-canvas {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.view {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    z-index: 1;
}

/* ── Corner brackets ─────────────────────────────────────── */
.bracket {
    position: fixed;
    width: 18px;
    height: 18px;
    border-color: #152535;
    border-style: solid;
    border-width: 0;
    z-index: 2;
    pointer-events: none;
}
.bracket.tl { top: 55px;    left: 55px;   border-top-width: 1px;    border-left-width: 1px; }
.bracket.tr { top: 55px;    right: 55px;  border-top-width: 1px;    border-right-width: 1px; }
.bracket.bl { bottom: 55px; left: 55px;   border-bottom-width: 1px; border-left-width: 1px; }
.bracket.br { bottom: 55px; right: 55px;  border-bottom-width: 1px; border-right-width: 1px; }

/* ── Shared header ───────────────────────────────────────── */
.menu-header {
    height: 54px;
    border-bottom: 1px solid #0d1c2e;
    display: flex;
    align-items: center;
    padding: 0 clamp(24px, 4vw, 48px);
    flex-shrink: 0;
    background: #050911;
}

.header-brand {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 4px;
}

.header-action {
    margin-left: auto;
    padding: 4px 14px;
    border: 1px solid rgba(6, 182, 212, 0.4);
    border-radius: 4px;
    background: rgba(6, 182, 212, 0.08);
    color: var(--cyan);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 1px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}
.header-action:hover {
    border-color: rgba(6, 182, 212, 0.9);
    background: rgba(6, 182, 212, 0.2);
}

/* ── Shared footer ───────────────────────────────────────── */
.menu-footer {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 8px;
    color: var(--text-muted);
    letter-spacing: 2px;
    padding: 10px 0 8px;
    flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════
   LOADING VIEW
═══════════════════════════════════════════════════════════ */
.view-loading {
    align-items: center;
    justify-content: space-between;
}

.load-inner {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.load-tag {
    padding: 4px 18px;
    border: 1px solid rgba(59, 130, 246, 0.32);
    border-radius: 4px;
    background: rgba(59, 130, 246, 0.08);
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--blue);
    letter-spacing: 4px;
        margin-bottom: 40px;
}

.load-title {
    font-family: var(--font-mono);
    font-size: clamp(12px, 1.4vw, 18px);
    color: var(--text-pri);
    letter-spacing: 6px;
    font-weight: 700;
    margin-bottom: 8px;
}

.load-subtitle {
    font-family: var(--font-mono);
    font-size: clamp(8px, 0.9vw, 12px);
    color: var(--text-muted);
    letter-spacing: 4px;
}

.load-rule {
    width: clamp(200px, 28vw, 380px);
    height: 1px;
    background: #0f1e2e;
        margin: 18px auto 28px;
}

.load-bar-track {
    width: clamp(240px, 35vw, 480px);
    height: 6px;
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.25);
    border-radius: 4px;
    margin-bottom: 14px;
    position: relative;
}

.load-bar-fill {
    height: 100%;
    background: var(--blue);
    border-radius: 3px;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.6);
    transition: width 0.15s ease-out;
}

.load-status {
    font-family: var(--font-mono);
    font-size: 8px;
    color: var(--text-muted);
    letter-spacing: 3px;
}

/* ═══════════════════════════════════════════════════════════
   MODE SELECT VIEW
═══════════════════════════════════════════════════════════ */
.view-mode-select {
    align-items: center;
    justify-content: flex-start;
}

.ms-top {
    width: 100%;
    text-align: center;
    padding-top: 36px;
    flex-shrink: 0;
}

.ms-site-label {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 5px;
}

.ms-rule {
    width: 600px;
    max-width: 80%;
    height: 1px;
    background: #0f1e2e;
    margin: 12px auto 0;
}

.ms-title {
    text-align: center;
    padding: 24px 0 0;
    flex-shrink: 0;
}

.ms-title h1 {
    font-size: clamp(26px, 3vw, 56px);
    font-weight: 700;
    color: var(--text-pri);
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.ms-title p {
    font-size: clamp(13px, 1.4vw, 26px);
    font-weight: 400;
    color: var(--text-sec);
    letter-spacing: 0.2px;
}

.ms-cards-row {
    flex: 1;
    display: flex;
    gap: clamp(16px, 3vw, 48px);
    justify-content: center;
    align-items: center;
    padding: 24px clamp(40px, 10vw, 180px);
}

.ms-sep {
    position: absolute;
    left: 50%;
    top: 148px;
    bottom: 60px;
    width: 1px;
    background: #0f1e2e;
    pointer-events: none;
}

/* Mode card */
.mode-card {
    width: clamp(280px, 30vw, 600px);
    height: clamp(340px, 52vh, 660px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
    transition: border-color 0.15s, background 0.15s;
}

.mode-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    border-radius: 8px 8px 0 0;
    transition: opacity 0.15s;
}

.mode-card.blue::after  { background: var(--blue); opacity: 0.75; }
.mode-card.cyan::after  { background: var(--cyan); opacity: 0.75; }
.mode-card:hover        { background: #101c2e; }
.mode-card.blue:hover   { border-color: var(--blue); }
.mode-card.blue:hover::after { opacity: 1; }
.mode-card.cyan:hover   { border-color: var(--cyan); }
.mode-card.cyan:hover::after { opacity: 1; }

.card-tag-pill {
    margin-top: 20px;
    padding: 3px 12px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 3px;
    font-weight: 700;
}
.mode-card.blue .card-tag-pill { color: var(--blue); background: rgba(59,130,246,0.12); border: 1px solid rgba(59,130,246,0.3); }
.mode-card.cyan .card-tag-pill { color: var(--cyan); background: rgba(6,182,212,0.12);  border: 1px solid rgba(6,182,212,0.3); }

.card-icon-area {
    height: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.mode-card.blue .card-icon-area { color: var(--blue); }
.mode-card.cyan .card-icon-area { color: var(--cyan); }
.card-icon-area svg { opacity: 0.55; transition: opacity 0.15s; }
.mode-card:hover .card-icon-area svg { opacity: 0.9; }

.card-rule {
    width: calc(100% - 56px);
    height: 1px;
    background: var(--border);
    margin-bottom: 22px;
}

.card-title {
    font-size: clamp(18px, 2vw, 38px);
    font-weight: 600;
    color: var(--text-pri);
    text-align: center;
    margin-bottom: 10px;
    padding: 0 16px;
    letter-spacing: -0.2px;
}

.card-desc {
    font-size: clamp(12px, 1.2vw, 22px);
    font-weight: 400;
    color: var(--text-sec);
    text-align: center;
    padding: 0 24px;
    line-height: 1.6;
}

.card-enter-btn {
    position: absolute;
    bottom: 22px;
    left: 22px; right: 22px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 3px;
    font-weight: 700;
    color: var(--text-pri);
    transition: background 0.15s, border-color 0.15s;
}
.mode-card.blue .card-enter-btn { background: rgba(59,130,246,0.10); border: 1px solid rgba(59,130,246,0.45); }
.mode-card.blue:hover .card-enter-btn { background: rgba(59,130,246,0.24); border-color: var(--blue); }
.mode-card.cyan .card-enter-btn { background: rgba(6,182,212,0.10); border: 1px solid rgba(6,182,212,0.45); }
.mode-card.cyan:hover .card-enter-btn { background: rgba(6,182,212,0.24); border-color: var(--cyan); }

/* ═══════════════════════════════════════════════════════════
   DEMO MENU VIEW
═══════════════════════════════════════════════════════════ */
.dm-section {
    padding: 22px clamp(40px, 7vw, 96px) 0;
    flex-shrink: 0;
}

.dm-section h2 {
    font-size: clamp(22px, 2.4vw, 48px);
    font-weight: 700;
    color: var(--text-pri);
    margin-bottom: 5px;
    letter-spacing: -0.3px;
}

.dm-section p {
    font-size: clamp(12px, 1.2vw, 22px);
    font-weight: 400;
    color: var(--text-sec);
    letter-spacing: 0.2px;
}

.dm-rule {
    height: 1px;
    background: var(--border);
    margin: 12px clamp(40px, 7vw, 96px) 0;
    flex-shrink: 0;
}

.cat-list {
    flex: 1;
    padding: 10px clamp(40px, 7vw, 96px) 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow-y: auto;
}

/* Category card */
.cat-card {
    height: clamp(76px, 10vh, 148px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 5px;
    display: flex;
    align-items: center;
    padding: 0 22px;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    transition: background 0.12s, border-color 0.12s;
}

.cat-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    border-radius: 5px 0 0 5px;
    background: rgba(var(--accent-rgb), 1);
    opacity: 0.65;
    transition: opacity 0.12s;
}

.cat-card.enabled { cursor: pointer; }
.cat-card.enabled:hover { background: #101c2e; border-color: rgba(var(--accent-rgb), 1); }
.cat-card.enabled:hover::before { opacity: 1; }
.cat-card.disabled { opacity: 0.45; cursor: default; }

.cat-icon {
    width: 44px; height: 44px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 18px;
    flex-shrink: 0;
    color: rgba(var(--accent-rgb), 1);
    background: rgba(var(--accent-rgb), 0.12);
    border: 1px solid rgba(var(--accent-rgb), 0.38);
    transition: transform 0.15s, background 0.15s;
}
.cat-icon svg { width: 24px; height: 24px; }
.cat-card.enabled:hover .cat-icon {
    background: rgba(var(--accent-rgb), 0.22);
    transform: scale(1.05);
}

.cat-tag {
    padding: 3px 9px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 2px;
    white-space: nowrap;
    flex-shrink: 0;
    color: rgba(var(--accent-rgb), 1);
    background: rgba(var(--accent-rgb), 0.1);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
}

.cat-info { flex: 1; min-width: 0; }

.cat-name {
    font-size: clamp(15px, 1.5vw, 30px);
    font-weight: 600;
    color: var(--text-pri);
    margin-bottom: 3px;
    letter-spacing: -0.1px;
}

.cat-desc {
    font-size: clamp(11px, 1.1vw, 20px);
    font-weight: 400;
    color: var(--text-sec);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cat-badge {
    width: 32px; height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 700;
    margin-right: 14px;
    flex-shrink: 0;
    color: rgba(var(--accent-rgb), 1);
    background: rgba(var(--accent-rgb), 0.12);
    border: 1px solid rgba(var(--accent-rgb), 0.38);
}

.cat-arrow {
    font-size: 24px;
    color: #1e3555;
    flex-shrink: 0;
    transition: color 0.12s;
}
.cat-card.enabled:hover .cat-arrow { color: var(--text-sec); }

/* ═══════════════════════════════════════════════════════════
   DEMO TESTS VIEW
═══════════════════════════════════════════════════════════ */
.dt-nav {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px clamp(40px, 7vw, 96px) 0;
    flex-shrink: 0;
}

.btn-back {
    padding: 5px 14px;
    border: 1px solid rgba(59,130,246,0.28);
    border-radius: 4px;
    background: rgba(59,130,246,0.05);
    color: var(--blue);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 2px;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
    flex-shrink: 0;
    line-height: 18px;
}
.btn-back:hover {
    background: rgba(59,130,246,0.14);
    border-color: rgba(59,130,246,0.7);
}

.dt-nav-info .nav-tag {
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 3px;
    margin-bottom: 3px;
}
.dt-nav-info .nav-name {
    font-size: clamp(17px, 2vw, 36px);
    font-weight: 700;
    color: var(--text-pri);
    line-height: 1.1;
    letter-spacing: -0.2px;
}

.dt-rule {
    height: 1px;
    background: var(--border);
    margin: 12px clamp(40px, 7vw, 96px) 0;
    flex-shrink: 0;
}

.test-list {
    flex: 1;
    padding: 12px clamp(40px, 7vw, 96px) 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
}

/* Test card */
.test-card {
    min-height: clamp(108px, 14vh, 200px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 5px;
    display: flex;
    align-items: stretch;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    cursor: default;
    transition: background 0.12s, border-color 0.12s;
}

.test-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    border-radius: 5px 0 0 5px;
    background: rgba(var(--accent-rgb), 1);
    opacity: 0.55;
    transition: opacity 0.12s;
}

.test-card:hover { background: #101c2e; border-color: rgba(var(--accent-rgb), 1); }
.test-card:hover::before { opacity: 1; }

.test-card-body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 9px;
    padding: 18px 22px;
}

.test-name {
    font-size: clamp(16px, 1.6vw, 32px);
    font-weight: 600;
    color: var(--text-pri);
    letter-spacing: -0.1px;
}

.test-tags {
    display: flex;
    gap: 7px;
    flex-wrap: wrap;
}

.test-tag {
    padding: 2px 8px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 1px;
    color: rgba(var(--accent-rgb), 1);
    background: rgba(var(--accent-rgb), 0.1);
}

/* ── Difficulty toggle (labels outside track) ───────────── */
.diff-row {
    display: flex;
    align-items: center;
}

.diff-toggle {
    display: flex;
    align-items: center;
    gap: 9px;
    cursor: pointer;
    border: none;
    background: none;
    padding: 0;
}

.diff-lbl {
    font-family: var(--font-mono);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 1px;
    transition: color 0.2s;
    user-select: none;
}
.diff-lbl.lbl-on-easy  { color: #22c55e; }
.diff-lbl.lbl-on-hard  { color: #f87171; }
.diff-lbl.lbl-off      { color: #1e2e1e; }

/* Narrow track — thumb only, no internal labels */
.diff-track {
    width: 44px;
    height: 22px;
    border-radius: 11px;
    position: relative;
    transition: background 0.2s, border-color 0.2s;
    flex-shrink: 0;
}
.diff-track.easy {
    background: rgba(34, 197, 94, 0.14);
    border: 1px solid rgba(34, 197, 94, 0.45);
}
.diff-track.hard {
    background: rgba(248, 113, 113, 0.14);
    border: 1px solid rgba(248, 113, 113, 0.45);
}

.diff-thumb {
    position: absolute;
    top: 2px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    transition: left 0.2s, background 0.2s;
}
.diff-track.easy .diff-thumb { left: 2px;               background: #22c55e; }
.diff-track.hard .diff-thumb { left: calc(100% - 20px); background: #f87171; }

/* Launch button */
.test-card-actions {
    display: flex;
    align-items: center;
    padding: 0 22px 0 0;
    flex-shrink: 0;
}

.btn-launch {
    width: 152px;
    height: 38px;
    border-radius: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 3px;
    font-weight: 700;
    color: var(--text-pri);
    cursor: pointer;
    border: 1px solid rgba(var(--accent-rgb), 0.5);
    background: rgba(var(--accent-rgb), 0.12);
    transition: background 0.12s, border-color 0.12s;
}
.btn-launch:hover {
    background: rgba(var(--accent-rgb), 0.28);
    border-color: rgba(var(--accent-rgb), 1);
}

/* Description panel */
.desc-panel {
    margin: 8px clamp(40px, 7vw, 96px);
    padding: 14px 18px;
    background: #07101a;
    border: 1px solid var(--border);
    border-radius: 5px;
    flex-shrink: 0;
    min-height: 76px;
}

.desc-label {
    font-family: var(--font-mono);
    font-size: 8px;
    color: var(--text-muted);
    letter-spacing: 3px;
    margin-bottom: 8px;
}

.desc-text {
    font-size: clamp(12px, 1.2vw, 22px);
    font-weight: 400;
    line-height: 1.6;
    transition: color 0.15s;
}

/* ═══════════════════════════════════════════════════════════
   WAIT / EXPERIMENT VIEW
═══════════════════════════════════════════════════════════ */
.wait-inner {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.wait-tag {
    padding: 4px 18px;
    border: 1px solid rgba(6, 182, 212, 0.32);
    border-radius: 4px;
    background: rgba(6, 182, 212, 0.1);
    font-family: var(--font-mono);
    font-size: 9px;
    color: var(--cyan);
    letter-spacing: 4px;
    margin-bottom: 24px;
}

.wait-icon-wrap {
    position: relative;
    width: 164px;
    height: 164px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
}

.wait-pulse {
    position: absolute;
    top: 50%; left: 50%;
    border-radius: 50%;
    border: 2px solid var(--cyan);
    transform: translate(-50%, -50%);
    animation: pulse-out 2.5s linear infinite;
    pointer-events: none;
}

@keyframes pulse-out {
    0%   { width: 12px;  height: 12px;  opacity: 0.6; }
    100% { width: 164px; height: 164px; opacity: 0; }
}

.wait-icon {
    position: relative;
    z-index: 1;
}

.wait-title {
    font-size: clamp(20px, 2.2vw, 44px);
    font-weight: 700;
    color: var(--text-pri);
    margin-bottom: 8px;
    letter-spacing: -0.2px;
}

.wait-subtitle {
    font-size: clamp(12px, 1.3vw, 24px);
    font-weight: 400;
    color: var(--text-sec);
    margin-bottom: 20px;
}

.wait-enter-hint {
    font-family: var(--font-mono);
    font-size: 9px;
    color: #1a2d3e;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.wait-divider {
    width: 240px;
    height: 1px;
    background: var(--border);
    margin-bottom: 12px;
}

.btn-return {
    padding: 5px 20px;
    border: 1px solid rgba(59,130,246,0.22);
    border-radius: 4px;
    background: rgba(59,130,246,0.05);
    color: #2a5070;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 2px;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s, color 0.12s;
    line-height: 18px;
}
.btn-return:hover {
    background: rgba(59,130,246,0.14);
    border-color: rgba(59,130,246,0.7);
    color: var(--blue);
}