:root {
  color-scheme: light;
  --bg: #f5f2ec;
  --panel: #fffdf8;
  --panel-strong: #f1ece2;
  --text: #171717;
  --muted: #67615a;
  --line: #d9d1c4;
  --accent: #0f766e;
  --accent-dark: #0b5f59;
  --accent-soft: #d9efec;
  --warning: #a16207;
  --pin-key: #c99b2e;
  --pin-driver: #79818b;
  --shadow: 0 18px 45px rgba(39, 33, 24, 0.13);
}

:root.dark {
  color-scheme: dark;
  --bg: #121513;
  --panel: #1c211f;
  --panel-strong: #252c29;
  --text: #f5f1e8;
  --muted: #b8b1a6;
  --line: #39413d;
  --accent: #45c4b6;
  --accent-dark: #83ded4;
  --accent-soft: #183f3b;
  --warning: #f0b84d;
  --pin-key: #d8aa38;
  --pin-driver: #aab3bd;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.14), transparent 34rem),
    linear-gradient(135deg, var(--bg), var(--panel-strong));
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.workspace {
  min-height: calc(100vh - 64px);
  display: grid;
  align-content: start;
  gap: 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.eyebrow,
.small-label {
  display: block;
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(2.1rem, 7vw, 5.6rem);
}

h2 {
  font-size: 1.45rem;
}

.icon-button,
.primary-button,
.secondary-button {
  border: 1px solid var(--line);
  border-radius: 8px;
  min-height: 44px;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.icon-button:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 46px;
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow);
  text-decoration: none;
}

.theme-mark {
  width: 20px;
  height: 20px;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: linear-gradient(90deg, currentColor 50%, transparent 50%);
}

.github-mark {
  width: 22px;
  height: 22px;
  display: block;
  fill: currentColor;
}

.generator-grid {
  display: grid;
  grid-template-columns: minmax(320px, 430px) minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.control-panel,
.result-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: var(--shadow);
}

.control-panel {
  display: grid;
  gap: 18px;
  padding: 18px;
}

fieldset {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 12px;
  font-size: 0.9rem;
  font-weight: 800;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

input[type="number"],
input[type="text"] {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  padding: 0 12px;
}

input::placeholder {
  color: color-mix(in srgb, var(--muted) 70%, transparent);
}

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

input[type="checkbox"] {
  accent-color: var(--accent);
}

output {
  color: var(--accent-dark);
  font-weight: 800;
}

.switch-row {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.switch-row input {
  width: 22px;
  height: 22px;
}

.security-options {
  display: none;
  gap: 14px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
}

.security-options.is-active {
  display: grid;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 8px;
}

.check-grid label {
  min-height: 38px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  font-size: 0.78rem;
  line-height: 1.15;
}

.button-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.primary-button,
.secondary-button {
  padding: 0 14px;
  font-weight: 800;
}

.primary-button {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.secondary-button {
  background: var(--panel);
  color: var(--text);
}

.result-panel {
  overflow: hidden;
}

.result-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 14px;
  padding: 20px;
  border-bottom: 1px solid var(--line);
}

.seed-pill {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 800;
  line-height: 1.35;
  white-space: nowrap;
}

.seed-actions {
  display: flex;
  align-items: center;
  justify-content: end;
  gap: 8px;
  flex-wrap: wrap;
}

.compact-button {
  min-height: 34px;
  padding: 0 10px;
  font-size: 0.8rem;
}

.pin-visual {
  min-height: 430px;
  display: grid;
  grid-template-columns: repeat(var(--pin-count, 5), minmax(58px, 1fr));
  gap: 8px;
  align-items: stretch;
  padding: 24px 14px 28px;
  background:
    linear-gradient(to bottom, transparent 49%, color-mix(in srgb, var(--line) 70%, transparent) 50%, transparent 51%),
    var(--panel);
}

.chamber {
  min-height: 370px;
  display: grid;
  grid-template-rows: minmax(250px, 1fr) auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, var(--panel-strong), var(--panel));
  overflow: hidden;
}

.chamber-body {
  --shear-line-position: 48%;
  position: relative;
  display: grid;
  align-items: end;
  justify-items: center;
  padding: 30px 8px 10px;
}

.chamber-body::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: var(--shear-line-position);
  height: 2px;
  background: var(--warning);
  opacity: 0.7;
}

.chamber-number {
  position: absolute;
  top: 9px;
  left: 9px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
}

.empty-marker {
  position: absolute;
  left: 50%;
  top: var(--shear-line-position);
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 10px;
  border: 1px dashed var(--muted);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.type-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--panel-strong);
  color: var(--text);
  font-size: clamp(0.7rem, 0.72vw, 0.82rem);
  font-weight: 800;
  overflow-wrap: anywhere;
  text-align: center;
}

.chamber-data {
  display: grid;
  gap: 6px;
  padding: 10px 6px 12px;
  border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 82%, var(--panel-strong));
}

.data-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  min-width: 0;
}

.data-label {
  color: var(--muted);
  font-size: clamp(0.58rem, 0.62vw, 0.68rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.data-value {
  color: var(--text);
  font-size: clamp(0.76rem, 0.8vw, 0.9rem);
  font-weight: 800;
  overflow-wrap: anywhere;
}

.about-panel {
  display: grid;
  grid-template-columns: minmax(210px, 0.65fr) minmax(0, 1.35fr);
  gap: 20px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  box-shadow: var(--shadow);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.about-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 650;
  line-height: 1.55;
}

.option-list {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 4px 0 0;
}

.option-list div {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.option-list dt {
  margin: 0 0 5px;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 800;
}

.option-list dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 650;
  line-height: 1.45;
}

@media (max-width: 980px) {
  .app-shell {
    width: min(100% - 20px, 700px);
    padding: 18px 0;
  }

  .workspace {
    min-height: calc(100vh - 36px);
  }

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

  .about-panel,
  .about-grid,
  .option-list {
    grid-template-columns: 1fr;
  }

  .pin-visual {
    min-height: 370px;
    grid-template-columns: repeat(var(--pin-count, 5), minmax(72px, 1fr));
    gap: 8px;
    padding: 20px 12px 24px;
  }

  .chamber {
    min-height: 330px;
  }

}

@media (max-width: 820px) {
  .check-grid {
    grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  }
}

@media (max-width: 460px) {
  .topbar {
    align-items: end;
  }

  .top-actions {
    gap: 8px;
  }

  .button-row {
    grid-template-columns: 1fr;
  }

  .result-header {
    display: grid;
  }

  .pin-visual {
    overflow-x: auto;
    grid-template-columns: repeat(var(--pin-count, 5), minmax(76px, 1fr));
  }
}