:root {
    --bg: #f3ede2;
    --panel: rgba(255, 250, 242, 0.88);
    --panel-strong: rgba(255, 252, 247, 0.96);
    --border: rgba(49, 41, 30, 0.18);
    --ink: #211b12;
    --muted: #6c604f;
    --accent: #16697a;
    --accent-soft: rgba(22, 105, 122, 0.14);
    --glow: rgba(120, 231, 255, 0.2);
    --monomer-a: #3576f6;
    --monomer-u: #d7a300;
    --monomer-g: #1f9d62;
    --monomer-c: #df4f46;
    --oligomer: #818790;
    --replicator: #dcfcff;
    --replicator-line: #7ef1ff;
    --parasite: #f58a2a;
    --shadow: 0 22px 48px rgba(39, 31, 21, 0.12);
}

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    background:
        radial-gradient(circle at top left, rgba(67, 147, 167, 0.18), transparent 28%),
        radial-gradient(circle at top right, rgba(245, 138, 42, 0.16), transparent 24%),
        linear-gradient(180deg, #f8f3eb 0%, var(--bg) 55%, #ede4d5 100%);
    font-family: Georgia, 'Times New Roman', serif;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(33, 27, 18, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(33, 27, 18, 0.035) 1px, transparent 1px);
    background-size: 34px 34px;
    pointer-events: none;
    opacity: 0.45;
}

button,
input {
    font: inherit;
}

.sim-page {
    position: relative;
    max-width: 1440px;
    margin: 0 auto;
    padding: 32px 20px 56px;
}

.hero-panel,
.panel {
    position: relative;
    z-index: 1;
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    background: var(--panel);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.hero-panel {
    padding: 28px;
    border-radius: 28px;
    margin-bottom: 22px;
    overflow: hidden;
}

.hero-panel::after {
    content: "";
    position: absolute;
    inset: auto -10% -36% auto;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(126, 241, 255, 0.2), transparent 70%);
}

.eyebrow {
    margin: 0 0 10px;
    font-size: 0.82rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
}

h1,
h2,
h3,
.legend-chip,
.ghost-button,
.primary-button,
.text-link,
.subtle,
.status-token,
.control-readout,
.metric-label,
.metric-value,
.event-entry,
label,
input[type="range"] {
    font-family: 'Courier New', Courier, monospace;
}

h1 {
    margin: 0;
    font-size: clamp(2.3rem, 4vw, 4.8rem);
    line-height: 0.92;
    max-width: 12ch;
}

.lede {
    max-width: 72ch;
    margin: 16px 0 0;
    font-size: 1.08rem;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 22px;
}

.text-link,
.ghost-button,
.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0 16px;
    border-radius: 999px;
    text-decoration: none;
    cursor: pointer;
    transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.text-link,
.ghost-button {
    color: var(--ink);
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(49, 41, 30, 0.14);
}

.primary-button {
    color: #fefdfb;
    background: linear-gradient(135deg, #1f6f81, #184552);
    border: 1px solid rgba(13, 57, 68, 0.8);
}

.text-link:hover,
.ghost-button:hover,
.primary-button:hover {
    transform: translateY(-1px);
}

.workspace-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.8fr) minmax(320px, 0.95fr);
    gap: 20px;
    align-items: start;
}

.panel {
    border-radius: 24px;
    padding: 20px;
}

.control-stack {
    display: grid;
    gap: 20px;
}

.stage-header,
.section-head {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: start;
}

.section-head.compact {
    align-items: center;
}

h2 {
    margin: 0;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.subtle {
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1.4;
}

.canvas-shell {
    position: relative;
    margin-top: 16px;
    overflow: hidden;
    border-radius: 20px;
    border: 1px solid rgba(33, 27, 18, 0.12);
    background:
        radial-gradient(circle at center, rgba(126, 241, 255, 0.08), transparent 36%),
        linear-gradient(180deg, rgba(10, 18, 28, 0.94), rgba(22, 25, 37, 0.98));
}

#sim-canvas,
#history-canvas {
    display: block;
    width: 100%;
    height: auto;
}

.hover-card {
    position: absolute;
    min-width: 220px;
    max-width: 320px;
    pointer-events: none;
    padding: 12px 14px;
    border-radius: 16px;
    color: #f8fbff;
    background: rgba(8, 12, 17, 0.92);
    border: 1px solid rgba(126, 241, 255, 0.34);
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.35);
}

.hover-card strong {
    display: block;
    margin-bottom: 8px;
    font-size: 0.86rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hover-card code {
    display: block;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.84rem;
    line-height: 1.45;
    word-break: break-all;
}

.status-strip {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.status-token {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 0 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.65);
    border: 1px solid rgba(49, 41, 30, 0.12);
    font-size: 0.74rem;
    color: var(--muted);
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.controls-form {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.control-row {
    padding: 14px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.58);
    border: 1px solid rgba(49, 41, 30, 0.1);
}

.control-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: baseline;
    margin-bottom: 10px;
}

.control-header label {
    font-size: 0.82rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.control-description,
.control-effect {
    margin: 0 0 10px;
    font-size: 0.84rem;
    line-height: 1.55;
    color: var(--muted);
}

.control-effect {
    margin: 10px 0 0;
}

.control-effect strong {
    color: var(--ink);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.control-readout {
    font-size: 0.86rem;
    color: var(--accent);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 18px;
}

.metric-card {
    padding: 14px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(49, 41, 30, 0.1);
}

.metric-label {
    display: block;
    font-size: 0.74rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--muted);
}

.metric-value {
    display: block;
    margin-top: 8px;
    font-size: 1.45rem;
}

.event-log {
    display: grid;
    gap: 10px;
    margin-top: 16px;
    max-height: 320px;
    overflow: auto;
    padding-right: 4px;
}

.event-entry {
    padding: 12px 14px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.58);
    border: 1px solid rgba(49, 41, 30, 0.1);
    font-size: 0.82rem;
    line-height: 1.45;
}

.event-entry strong {
    color: var(--accent);
}

.chart-panel,
.notes-panel {
    margin-top: 20px;
}

.explainer-panel {
    margin-bottom: 20px;
}

.chart-legend {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.legend-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 28px;
    padding: 0 10px;
    border-radius: 999px;
    font-size: 0.72rem;
    background: rgba(255, 255, 255, 0.58);
    border: 1px solid rgba(49, 41, 30, 0.1);
}

.legend-chip::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
}

.legend-chip.monomers {
    color: #4978ff;
}

.legend-chip.oligomers {
    color: #6f7a88;
}

.legend-chip.replicators {
    color: #0db5d6;
}

.legend-chip.parasites {
    color: #f58a2a;
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.explainer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.parameter-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.notes-grid article {
    padding: 16px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.58);
    border: 1px solid rgba(49, 41, 30, 0.1);
}

.notes-grid h3 {
    margin: 0 0 10px;
    font-size: 0.94rem;
}

.notes-grid p {
    margin: 0;
    color: var(--muted);
    line-height: 1.6;
}

@media (max-width: 1080px) {
    .workspace-grid {
        grid-template-columns: 1fr;
    }

    .notes-grid,
    .explainer-grid,
    .parameter-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .sim-page {
        padding: 18px 14px 36px;
    }

    .hero-panel,
    .panel {
        border-radius: 20px;
        padding: 16px;
    }

    .stage-header,
    .section-head,
    .section-head.compact {
        flex-direction: column;
        align-items: flex-start;
    }

    .metric-grid,
    .notes-grid,
    .explainer-grid,
    .parameter-grid {
        grid-template-columns: 1fr;
    }
}