:root {
  --bg: #f2efe8;
  --panel: rgba(255, 252, 246, 0.94);
  --panel-strong: #fffaf1;
  --text: #1f1a16;
  --muted: #66584b;
  --line: rgba(52, 41, 29, 0.12);
  --primary: #0f766e;
  --secondary: #b45309;
  --accent: #7c3aed;
  --shadow: 0 18px 50px rgba(34, 27, 20, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Noto Sans KR", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 35%),
    radial-gradient(circle at top right, rgba(180, 83, 9, 0.14), transparent 28%),
    linear-gradient(180deg, var(--bg) 0%, #f7f4ed 100%);
  min-height: 100vh;
}

.app-shell {
  width: min(1240px, calc(100% - 24px));
  margin: 0 auto;
  padding: 20px 0 28px;
}

.hero {
  padding: 8px 4px 18px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--secondary);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: clamp(1.9rem, 4vw, 3.1rem);
  line-height: 1.05;
}

.hero-copy,
#statusText,
#assignment1Status,
.mini-note,
.fixed-config,
.topbar-item label span {
  color: var(--muted);
}

.control-card,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.topbar {
  padding: 16px 18px;
  display: grid;
  grid-template-columns: minmax(220px, 260px) minmax(220px, 320px) minmax(180px, 220px) auto;
  gap: 14px;
  align-items: end;
}

.topbar-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.95rem;
}

input,
select,
button {
  font: inherit;
}

input,
select {
  width: 100%;
  border: 1px solid rgba(49, 40, 28, 0.14);
  background: var(--panel-strong);
  border-radius: 14px;
  padding: 11px 14px;
  color: var(--text);
}

input[type="range"] {
  padding: 0;
  height: 6px;
  border: none;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  accent-color: var(--accent);
}

.button-row {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

button {
  border: none;
  border-radius: 999px;
  padding: 12px 18px;
  background: linear-gradient(135deg, #115e59, var(--primary));
  color: white;
  font-weight: 700;
  cursor: pointer;
}

button.secondary {
  background: linear-gradient(135deg, #c67d1c, var(--secondary));
}

.assignment1-layout,
.ber-layout {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.assignment1-layout {
  grid-template-columns: 300px minmax(0, 1fr);
}

.ber-layout {
  grid-template-columns: minmax(0, 1.65fr) 360px;
}

.panel {
  padding: 16px;
}

.assignment1-side,
.ber-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.slider-item {
  gap: 10px;
}

.mini-note {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(15, 118, 110, 0.06);
  border: 1px solid var(--line);
  line-height: 1.45;
  font-size: 0.93rem;
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

canvas {
  width: 100%;
  height: auto;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(15, 118, 110, 0.06), rgba(255, 255, 255, 0)),
    #fffefb;
  border: 1px solid rgba(49, 40, 28, 0.08);
  margin-top: 12px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.03);
  color: var(--muted);
  font-size: 0.9rem;
}

.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.summary-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.assignment1-metrics {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 12px;
}

.summary-card {
  padding: 12px 14px;
  border-radius: 16px;
  background: var(--panel-strong);
  border: 1px solid var(--line);
}

.summary-card strong {
  display: block;
  margin-top: 6px;
  font-size: 1.1rem;
}

.fixed-config {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(124, 58, 237, 0.05);
  border: 1px solid var(--line);
  line-height: 1.55;
  font-size: 0.94rem;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-strong);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

thead th {
  background: rgba(15, 118, 110, 0.07);
}

[hidden] {
  display: none !important;
}

@media (max-width: 1100px) {
  .assignment1-layout,
  .ber-layout,
  .topbar {
    grid-template-columns: 1fr;
  }

  .button-row {
    justify-content: flex-start;
  }
}