:root {
  color-scheme: light;
  --bg: #f2efe8;
  --paper: rgba(255, 251, 245, 0.82);
  --panel: rgba(255, 254, 250, 0.92);
  --ink: #1d232b;
  --muted: #586273;
  --line: rgba(29, 35, 43, 0.12);
  --accent: #0f766e;
  --accent-strong: #115e59;
  --accent-soft: rgba(15, 118, 110, 0.15);
  --shadow: 0 20px 60px rgba(39, 43, 48, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(180, 83, 9, 0.1), transparent 24%),
    linear-gradient(180deg, #faf6ef 0%, var(--bg) 100%);
}

.page-shell {
  width: min(1200px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.hero {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--paper);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.4rem, 5vw, 4.1rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.lead {
  max-width: 65ch;
  margin-top: 16px;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.65;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  color: var(--ink);
  background: white;
  box-shadow: inset 0 0 0 1px var(--line);
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
}

button:hover:enabled {
  transform: translateY(-1px);
  box-shadow: inset 0 0 0 1px transparent, 0 10px 26px rgba(29, 35, 43, 0.12);
}

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

button.primary {
  color: white;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  box-shadow: 0 12px 30px rgba(17, 94, 89, 0.3);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.stats div {
  padding: 14px 16px;
  border-radius: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
}

dt {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.82rem;
}

dd {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.panel {
  padding: 18px;
  border-radius: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.panel-compact {
  padding-top: 14px;
  padding-bottom: 14px;
}

.panel-wide {
  grid-column: 1 / -1;
}

.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.panel-header.stacked {
  flex-direction: column;
  align-items: stretch;
}

.panel-header h2 {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.panel-header p {
  color: var(--muted);
  line-height: 1.45;
}

.slider-wrap {
  display: grid;
  gap: 6px;
  font-size: 0.94rem;
  color: var(--muted);
}

.slider-strip {
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 10px 14px;
}

.slider-strip span {
  grid-column: 1 / -1;
}

.slider-strip strong {
  white-space: nowrap;
}

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

canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(29, 35, 43, 0.08);
  background: linear-gradient(180deg, rgba(232, 239, 238, 0.6), rgba(249, 246, 239, 0.9));
}

@media (max-width: 900px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }

  .panel-wide {
    grid-column: auto;
  }
}