:root {
    --bg-color: #050505;
    --panel-bg: rgba(14, 14, 20, 0.76);
    --panel-border: rgba(255, 255, 255, 0.08);
    --accent-cyan: #00f3ff;
    --accent-green: #2ad38b;
    --accent-gold: #ffca5f;
    --accent-purple: #bc13fe;
    --accent-red: #ff5c79;
    --text-main: #f0f3f6;
    --text-dim: #8f98a3;
    --wall: #7d2f24;
    --wall-dark: #521912;
    --wall-mortar: #cfa593;
    --empty: rgba(255, 255, 255, 0.03);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg-color);
    color: var(--text-main);
    font-family: 'Rajdhani', 'Noto Sans SC', sans-serif;
    overflow-x: hidden;
}

body.embedded-course .page-shell {
    width: min(1540px, calc(100vw - 24px));
    padding-top: 18px;
}

body.embedded-course .topbar {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 22px;
}

body.embedded-course .back-link {
    display: none;
}

body.embedded-course .topbar h1 {
    font-size: clamp(38px, 5vw, 64px);
}

body.embedded-course .topbar p {
    max-width: none;
}

.bg-grid {
    position: fixed;
    inset: 0;
    background:
        linear-gradient(rgba(0, 243, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 243, 255, 0.03) 1px, transparent 1px);
    background-size: 56px 56px;
    transform: perspective(600px) rotateX(60deg) translateY(-120px) translateZ(-220px);
    z-index: -2;
    animation: grid-move 18s linear infinite;
}

@keyframes grid-move {
    0% { transform: perspective(600px) rotateX(60deg) translateY(0) translateZ(-220px); }
    100% { transform: perspective(600px) rotateX(60deg) translateY(64px) translateZ(-220px); }
}

.scanline {
    position: fixed;
    inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.35) 51%);
    background-size: 100% 4px;
    pointer-events: none;
    opacity: 0.15;
    z-index: 10;
}

.page-shell {
    width: min(1480px, calc(100vw - 40px));
    margin: 0 auto;
    padding: 32px 0 64px;
}

.topbar {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 28px;
    align-items: start;
    margin-bottom: 28px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-cyan);
    text-decoration: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    margin-top: 10px;
}

.eyebrow,
.panel-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border: 1px solid rgba(0, 243, 255, 0.2);
    background: rgba(0, 243, 255, 0.06);
    color: var(--accent-cyan);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: none;
}

.topbar h1 {
    margin: 14px 0 12px;
    font-size: clamp(46px, 7vw, 86px);
    line-height: 0.95;
}

.topbar p {
    margin: 0;
    max-width: 940px;
    color: var(--text-dim);
    font-size: 1.15rem;
}

.teaching-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 26px;
}

.teaching-card,
.panel,
.sub-panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(14px);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.34);
}

.teaching-card {
    padding: 20px 22px;
}

.teaching-card span,
.stat-box span,
.field span,
.sub-header h3,
.status-pill,
.toolbar button,
.ghost-btn,
.secondary-btn,
.primary-btn {
    font-family: 'JetBrains Mono', monospace;
}

.teaching-card span {
    display: block;
    color: var(--accent-cyan);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: none;
}

.teaching-card strong {
    display: block;
    margin-top: 10px;
    font-size: 1.3rem;
}

.teaching-card p {
    margin: 10px 0 0;
    color: var(--text-dim);
}

.workspace {
    display: grid;
    grid-template-columns: minmax(560px, 1.05fr) minmax(420px, 0.95fr);
    gap: 24px;
}

.panel {
    padding: 24px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: start;
    margin-bottom: 20px;
}

.panel-header h2 {
    margin: 10px 0 0;
    font-size: 2rem;
}

.status-pill {
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 12px;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.03);
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: none;
}

.status-pill.ok {
    color: var(--accent-green);
    border-color: rgba(42, 211, 139, 0.28);
    background: rgba(42, 211, 139, 0.08);
}

.status-pill.warn {
    color: var(--accent-gold);
    border-color: rgba(255, 202, 95, 0.28);
    background: rgba(255, 202, 95, 0.08);
}

.status-pill.error {
    color: var(--accent-red);
    border-color: rgba(255, 92, 121, 0.28);
    background: rgba(255, 92, 121, 0.08);
}

.status-pill.neutral {
    color: var(--text-dim);
}

.toolbar,
.button-row,
.legend,
.arena-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.toolbar {
    justify-content: space-between;
    margin-bottom: 20px;
}

.tool-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tool-btn,
.secondary-btn,
.primary-btn,
.ghost-btn {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-main);
    padding: 10px 14px;
    cursor: pointer;
    transition: 0.25s ease;
}

.tool-btn.active,
.tool-btn:hover,
.secondary-btn:hover,
.ghost-btn:hover {
    border-color: rgba(0, 243, 255, 0.28);
    color: var(--accent-cyan);
    background: rgba(0, 243, 255, 0.08);
}

.primary-btn {
    border-color: rgba(42, 211, 139, 0.28);
    background: rgba(42, 211, 139, 0.12);
    color: #dffff1;
    font-weight: 700;
}

.primary-btn.accent {
    border-color: rgba(255, 202, 95, 0.28);
    background: rgba(255, 202, 95, 0.12);
    color: #fff3d2;
}

.primary-btn.is-loading {
    position: relative;
    padding-right: 42px;
}

.primary-btn.is-loading::after {
    content: '';
    position: absolute;
    right: 14px;
    top: 50%;
    width: 14px;
    height: 14px;
    margin-top: -7px;
    border-radius: 999px;
    border: 2px solid rgba(255,255,255,0.22);
    border-top-color: rgba(255,255,255,0.9);
    animation: spin 0.8s linear infinite;
}

.secondary-btn.danger:hover {
    border-color: rgba(255, 92, 121, 0.28);
    background: rgba(255, 92, 121, 0.08);
    color: var(--accent-red);
}

.grid {
    display: grid;
    grid-template-columns: repeat(8, minmax(48px, 1fr));
    gap: 10px;
    margin-bottom: 18px;
}

.cell {
    position: relative;
    appearance: none;
    -webkit-appearance: none;
    aspect-ratio: 1;
    padding: 0;
    border-radius: 0;
    border: 1px solid rgba(255, 255, 255, 0.06);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.035), rgba(255,255,255,0.015)),
        radial-gradient(circle at 50% 30%, rgba(255,255,255,0.03), transparent 55%),
        #12151d;
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.03),
        inset 0 -10px 14px rgba(0,0,0,0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    transition: 0.2s ease;
    cursor: pointer;
}

.cell:hover {
    border-color: rgba(0, 243, 255, 0.22);
    transform: translateY(-1px);
}

.cell.wall {
    background:
        linear-gradient(180deg, rgba(255,255,255,0.14), rgba(255,255,255,0.02) 36%, rgba(0,0,0,0.18)),
        repeating-linear-gradient(
            0deg,
            transparent 0 15px,
            var(--wall-mortar) 15px 18px,
            transparent 18px 33px
        ),
        repeating-linear-gradient(
            90deg,
            rgba(0,0,0,0) 0 24px,
            var(--wall-mortar) 24px 27px,
            rgba(0,0,0,0) 27px 54px
        ),
        linear-gradient(180deg, #b74f3f 0%, #9f3a2d 42%, var(--wall) 42%, #8b3427 100%);
    border-color: rgba(255, 220, 206, 0.18);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.12),
        inset 0 -8px 14px rgba(0,0,0,0.22),
        inset 6px 0 10px rgba(0,0,0,0.14);
}

.cell.wall::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(
            90deg,
            rgba(0,0,0,0.14) 0 2px,
            transparent 2px 27px,
            rgba(0,0,0,0.10) 27px 29px,
            transparent 29px 54px
        ),
        radial-gradient(circle at 20% 22%, rgba(255,255,255,0.13), transparent 18%),
        radial-gradient(circle at 78% 70%, rgba(0,0,0,0.16), transparent 20%);
    opacity: 0.45;
    pointer-events: none;
}

.cell.visited {
    border-color: rgba(42, 211, 139, 0.36);
    background:
        linear-gradient(180deg, rgba(42, 211, 139, 0.18), rgba(42, 211, 139, 0.08)),
        radial-gradient(circle at 50% 30%, rgba(125,255,199,0.20), transparent 60%),
        #10171b;
    box-shadow:
        inset 0 0 0 2px rgba(42, 211, 139, 0.24),
        inset 0 -10px 14px rgba(0,0,0,0.18);
}

.cell.visited-twice {
    border-color: rgba(255, 202, 95, 0.4);
    background:
        linear-gradient(180deg, rgba(255, 202, 95, 0.22), rgba(255, 202, 95, 0.10)),
        radial-gradient(circle at 50% 30%, rgba(255,237,171,0.18), transparent 60%),
        #1a1711;
    box-shadow:
        inset 0 0 0 2px rgba(255, 202, 95, 0.28),
        inset 0 -10px 14px rgba(0,0,0,0.18);
}

.cell.visited-often {
    border-color: rgba(255, 92, 121, 0.44);
    background:
        linear-gradient(180deg, rgba(255, 92, 121, 0.24), rgba(255, 92, 121, 0.10)),
        radial-gradient(circle at 50% 30%, rgba(255,170,187,0.18), transparent 60%),
        #1a1013;
    box-shadow:
        inset 0 0 0 2px rgba(255, 92, 121, 0.3),
        inset 0 -10px 14px rgba(0,0,0,0.18);
}

.cell[data-visits]::after {
    content: attr(data-visits);
    position: absolute;
    top: 6px;
    right: 6px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--text-main);
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    line-height: 16px;
    text-align: center;
    z-index: 2;
}

.cell.start::before,
.cell.treasure::before,
.cell.hunter::before {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 0.95rem;
}

.cell.start::before {
    content: '起';
    color: var(--accent-cyan);
}

.cell.treasure::before {
    content: '宝';
    color: var(--accent-gold);
}

.cell.hunter {
    border-color: rgba(42, 211, 139, 0.72);
    box-shadow:
        inset 0 0 0 2px rgba(42, 211, 139, 0.42),
        0 0 0 1px rgba(42, 211, 139, 0.28),
        0 0 24px rgba(42, 211, 139, 0.24),
        0 0 48px rgba(42, 211, 139, 0.12);
    z-index: 1;
}

.cell.hunter.visited-twice {
    border-color: rgba(255, 202, 95, 0.74);
    box-shadow:
        inset 0 0 0 2px rgba(255, 202, 95, 0.42),
        0 0 0 1px rgba(255, 202, 95, 0.28),
        0 0 24px rgba(255, 202, 95, 0.24),
        0 0 48px rgba(255, 202, 95, 0.12);
}

.cell.hunter.visited-often {
    border-color: rgba(255, 92, 121, 0.78);
    box-shadow:
        inset 0 0 0 2px rgba(255, 92, 121, 0.42),
        0 0 0 1px rgba(255, 92, 121, 0.28),
        0 0 24px rgba(255, 92, 121, 0.26),
        0 0 48px rgba(255, 92, 121, 0.14);
}

.cell.hunter::before {
    content: '猎';
    color: var(--accent-green);
    text-shadow:
        0 0 10px rgba(42, 211, 139, 0.45),
        0 0 22px rgba(42, 211, 139, 0.26);
    transform: scale(1.08);
    z-index: 2;
    position: relative;
}

.cell.hunter[data-visits]::after {
    display: none;
}

.cell.treasure-hit {
    animation: treasure-burst 0.9s ease-out;
}

.cell.treasure-hit::after {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 14px;
    border: 2px solid rgba(255, 202, 95, 0.72);
    box-shadow:
        0 0 18px rgba(255, 202, 95, 0.45),
        0 0 36px rgba(255, 202, 95, 0.28);
    animation: treasure-ring 1s ease-out;
    pointer-events: none;
    z-index: 3;
}

.cell.treasure-hit::before {
    color: #ffe59a;
    text-shadow:
        0 0 10px rgba(255, 202, 95, 0.8),
        0 0 24px rgba(255, 202, 95, 0.46),
        0 0 42px rgba(255, 202, 95, 0.24);
}

.legend {
    margin-bottom: 20px;
    color: var(--text-dim);
}

.legend span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    display: inline-block;
}

.legend-dot.hunter { background: var(--accent-green); }
.legend-dot.start { background: var(--accent-cyan); }
.legend-dot.treasure { background: var(--accent-gold); }
.legend-dot.wall {
    background:
        linear-gradient(180deg, #bb5644 0%, #8f3226 100%);
    border: 1px solid rgba(255, 220, 206, 0.18);
}
.legend-dot.visited { background: rgba(42, 211, 139, 0.35); }
.legend-dot.visited-twice { background: rgba(255, 202, 95, 0.6); }
.legend-dot.visited-often { background: rgba(255, 92, 121, 0.65); }

.arena-footer {
    margin-top: 8px;
}

.stat-box {
    min-width: 160px;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
}

.stat-box span {
    display: block;
    color: var(--text-dim);
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.stat-box strong {
    display: block;
    margin-top: 10px;
    font-size: 1.25rem;
}

.field {
    display: block;
}

.field span {
    display: block;
    color: var(--accent-cyan);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: none;
    margin-bottom: 10px;
}

.field small {
    display: block;
    margin: -4px 0 12px;
    color: var(--text-dim);
    line-height: 1.5;
}

input,
textarea,
.mono-block,
.log-entry pre {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.28);
    color: var(--text-main);
    font-family: 'JetBrains Mono', monospace;
    white-space: pre-wrap;
    word-break: break-word;
    overflow-x: auto;
    max-height: none;
}

input,
textarea {
    padding: 14px;
    line-height: 1.5;
}

input {
    height: 48px;
}

textarea {
    resize: vertical;
    min-height: 230px;
    line-height: 1.65;
}

textarea.is-empty {
    border-color: rgba(255, 92, 121, 0.28);
    box-shadow: inset 0 0 0 1px rgba(255, 92, 121, 0.12);
}

.config-panel {
    margin-bottom: 18px;
    padding: 0;
    overflow: hidden;
}

.config-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 16px;
    cursor: pointer;
    list-style: none;
    color: var(--text-main);
    font-family: 'JetBrains Mono', monospace;
}

.config-summary::-webkit-details-marker {
    display: none;
}

.config-summary::after {
    content: '+';
    color: var(--accent-cyan);
    font-size: 18px;
    line-height: 1;
}

.config-panel[open] .config-summary::after {
    content: '−';
}

.config-panel[open] .config-summary-hint {
    display: none;
}

.config-summary-hint {
    color: var(--text-dim);
    font-size: 12px;
}

.config-panel-body {
    padding: 0 16px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.config-note {
    margin: 0 0 14px;
    color: var(--text-dim);
    line-height: 1.55;
}

.config-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.button-row {
    margin-top: 14px;
}

.primary-row {
    margin-top: 16px;
}

.sub-panels {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 18px;
}

.sub-panel {
    padding: 16px;
}

.sub-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.sub-header h3 {
    margin: 0;
    color: var(--text-main);
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.ghost-btn {
    padding: 6px 10px;
    font-size: 12px;
}

.log-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-height: 580px;
    overflow: auto;
}

.log-empty {
    padding: 16px;
    color: var(--text-dim);
    border: 1px dashed rgba(255, 255, 255, 0.12);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
}

.log-entry {
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    padding: 12px;
}

.log-entry header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
}

.log-entry strong {
    font-size: 1rem;
}

.log-entry span {
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
}

.log-entry p {
    margin: 0;
    color: var(--text-dim);
    line-height: 1.55;
}

.log-entry.success {
    border-color: rgba(42, 211, 139, 0.22);
}

.log-entry.error {
    border-color: rgba(255, 92, 121, 0.22);
}

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

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes hunter-pulse {
    0%, 100% {
        opacity: 0.95;
        transform: scale(1);
    }
    50% {
        opacity: 0.55;
        transform: scale(1.06);
    }
}

@keyframes treasure-burst {
    0% {
        transform: scale(1);
        filter: brightness(1);
    }
    24% {
        transform: scale(1.08);
        filter: brightness(1.25);
    }
    45% {
        transform: scale(0.98);
    }
    100% {
        transform: scale(1);
        filter: brightness(1);
    }
}

@keyframes treasure-ring {
    0% {
        opacity: 0.95;
        transform: scale(0.72);
    }
    100% {
        opacity: 0;
        transform: scale(1.24);
    }
}

@media (max-width: 1100px) {
    .workspace,
    .teaching-strip,
    .topbar {
        grid-template-columns: 1fr;
    }

    .topbar {
        gap: 14px;
    }
}

@media (max-width: 700px) {
    .page-shell {
        width: calc(100vw - 24px);
        padding-top: 18px;
    }

    .panel {
        padding: 18px;
    }

    .grid {
        gap: 8px;
    }

    .cell {
        min-height: 44px;
    }

    .topbar h1 {
        font-size: 2.6rem;
    }
}