:root {
    color-scheme: dark;
    --bg: #060b13;
    --panel: rgba(9, 15, 27, 0.78);
    --panel-border: rgba(148, 163, 184, 0.16);
    --text: #e5eefc;
    --muted: #93a4bc;
    --accent: #38bdf8;
    --accent-warm: #f97316;
    --accent-soft: #22c55e;
    --danger: #ef4444;
    --warning: #fde047;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    background:
        radial-gradient(circle at top left, rgba(56, 189, 248, 0.08), transparent 28%),
        radial-gradient(circle at top right, rgba(249, 115, 22, 0.08), transparent 25%),
        linear-gradient(180deg, #070b14 0%, #02060d 100%);
    color: var(--text);
    font-family: "Space Grotesk", sans-serif;
}

body {
    padding: 28px;
}

button,
input {
    font: inherit;
}

.app-shell {
    max-width: 1520px;
    margin: 0 auto;
}

.hero {
    margin-bottom: 16px;
}

.hero-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 18px 24px;
    flex-wrap: wrap;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.hero-switches {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px;
    margin-left: auto;
}

.eyebrow {
    margin: 0;
    font-size: 0.82rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
}

h1 {
    margin: 0;
    font-size: clamp(2.2rem, 4vw, 4.2rem);
    line-height: 0.96;
}

.playground-picker {
    position: relative;
}

.playground-heading {
    margin: 0;
}

.playground-btn {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    padding: 0;
    border: 0;
    background: none;
    color: var(--text);
    cursor: pointer;
}

.playground-btn:hover .playground-method-label,
.playground-picker.open .playground-method-label {
    color: #7dd3fc;
}

.playground-caret {
    width: 13px;
    height: 13px;
    flex: 0 0 auto;
    background: linear-gradient(135deg, #7dd3fc 0%, #34d399 100%);
    clip-path: polygon(0 0, 100% 50%, 0 100%);
    transform: rotate(0deg);
    transform-origin: center;
    transition: transform 180ms ease, filter 180ms ease;
    filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.25));
}

.playground-method-label,
.playground-suffix {
    font: inherit;
    line-height: inherit;
}

.playground-method-label {
    color: var(--accent);
    transition: color 180ms ease;
}

.playground-menu {
    position: absolute;
    top: calc(100% + 14px);
    left: 0;
    min-width: 260px;
    padding: 10px;
    border: 1px solid rgba(125, 211, 252, 0.22);
    border-radius: 18px;
    background: rgba(8, 14, 26, 0.92);
    backdrop-filter: blur(18px);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
    display: flex;
    flex-direction: column;
    gap: 6px;
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease;
    z-index: 20;
}

.playground-picker.open .playground-menu {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.playground-option {
    border: 1px solid transparent;
    background: rgba(15, 23, 42, 0.42);
    color: var(--text);
    border-radius: 14px;
    padding: 12px 14px;
    text-align: left;
    cursor: pointer;
    transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
}

.playground-option:hover {
    transform: translateY(-1px);
    border-color: rgba(148, 163, 184, 0.3);
    background: rgba(30, 41, 59, 0.75);
}

.playground-option.active {
    border-color: rgba(56, 189, 248, 0.42);
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(34, 197, 94, 0.12));
}

.robot-switch,
.tool-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.62fr) minmax(270px, 340px);
    gap: 22px;
}

.canvas-card,
.panel {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 24px;
    backdrop-filter: blur(16px);
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
}

.canvas-card {
    padding: 18px;
}

.canvas-topbar,
.canvas-footer,
.panel {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.canvas-topbar {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px 18px;
    margin-bottom: 16px;
}

.toolbar-actions {
    margin-left: auto;
    justify-content: flex-end;
}

.canvas-stack {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(148, 163, 184, 0.14);
    background: #040912;
}

#playgroundCanvas {
    display: block;
    width: 100%;
    aspect-ratio: 22 / 15;
    touch-action: none;
    cursor: crosshair;
}

.failure-overlay {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    text-align: center;
    background: rgba(3, 8, 15, 0.68);
    cursor: pointer;
}

.failure-overlay[hidden] {
    display: none;
}

.failure-overlay > * {
    z-index: 1;
}

.failure-badge {
    display: grid;
    place-items: center;
    width: 72px;
    height: 72px;
    margin: 0 auto 8px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.16);
    border: 1px solid rgba(239, 68, 68, 0.42);
    color: #fecaca;
    font: 700 2rem "IBM Plex Mono", monospace;
}

.failure-overlay h2 {
    margin: 0;
    font-size: 1.3rem;
}

.failure-overlay p {
    margin: 0;
    max-width: 360px;
    color: #fecaca;
}

.robot-btn,
.tool-btn,
.mini-btn {
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(15, 23, 42, 0.72);
    color: var(--text);
    border-radius: 999px;
    padding: 10px 16px;
    cursor: pointer;
    transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.robot-btn:hover,
.tool-btn:hover,
.mini-btn:hover {
    transform: translateY(-1px);
    border-color: rgba(148, 163, 184, 0.4);
}

.robot-btn.active {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.28), rgba(34, 197, 94, 0.18));
    border-color: rgba(56, 189, 248, 0.52);
}

.tool-btn.active {
    background: rgba(56, 189, 248, 0.16);
    border-color: rgba(56, 189, 248, 0.42);
}

.tool-btn.accent {
    background: rgba(249, 115, 22, 0.18);
    border-color: rgba(249, 115, 22, 0.45);
}

.mini-btn {
    background: rgba(15, 23, 42, 0.88);
}

.canvas-footer {
    margin-top: 16px;
    flex-direction: row;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
}

.canvas-footer p {
    margin: 0;
    color: var(--muted);
    max-width: 760px;
}

.footer-stats {
    display: flex;
    gap: 18px;
    color: var(--muted);
    font: 500 0.82rem "IBM Plex Mono", monospace;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 18px;
    width: 100%;
    max-width: 340px;
    justify-self: end;
}

.panel {
    padding: 18px;
}

.panel h2 {
    margin: 0;
    font-size: 1rem;
}

.panel-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-body {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.panel-body[hidden] {
    display: none;
}

.section-toggle {
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(15, 23, 42, 0.72);
    color: var(--text);
    border-radius: 999px;
    padding: 10px 16px;
    cursor: pointer;
    transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.section-toggle:hover {
    transform: translateY(-1px);
    border-color: rgba(148, 163, 184, 0.4);
}

.inline-toggle {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    font-size: 0.92rem;
    user-select: none;
}

.inline-toggle input {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
}

.inline-toggle span {
    cursor: pointer;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.control {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px 14px;
    align-items: center;
}

.control span {
    color: var(--muted);
}

.control strong {
    font: 500 0.9rem "IBM Plex Mono", monospace;
    color: var(--text);
}

.control input[type="range"] {
    grid-column: 1 / -1;
    width: 100%;
    accent-color: var(--accent);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.stat-card {
    padding: 12px;
    border-radius: 16px;
    background: rgba(15, 23, 42, 0.72);
    border: 1px solid rgba(148, 163, 184, 0.12);
}

.stat-label {
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

.stat-value {
    margin-top: 6px;
    font: 500 0.92rem "IBM Plex Mono", monospace;
    color: var(--text);
}

.note-list {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
    line-height: 1.55;
}

@media (max-width: 1100px) {
    body {
        padding: 18px;
    }

    .workspace {
        grid-template-columns: 1fr;
    }

    .hero-main {
        align-items: flex-start;
    }

    .hero-switches {
        justify-content: flex-start;
        margin-left: 0;
    }

    .canvas-topbar {
        align-items: flex-start;
    }

    .toolbar-actions {
        margin-left: 0;
        justify-content: flex-start;
    }
}

@media (max-width: 720px) {
    .canvas-footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}