:root {
  color-scheme: dark;
  --page: #101915;
  --page-glow: #193329;
  --surface: #18241f;
  --surface-soft: #1e2c26;
  --ink: #f0f6f3;
  --muted: #bccac4;
  --primary: #72c9a8;
  --primary-strong: #96dfc2;
  --primary-soft: #25483a;
  --border: #385248;
  --border-strong: #57766a;
  --focus: #f0c75e;
  --error: #ffd0cc;
  --error-surface: #3b2221;
  --error-border: #b96c66;
  --button-ink: #102019;
  --shadow: 0 1rem 3rem rgb(0 0 0 / 28%);
  --radius-large: 1rem;
  --radius-medium: 0.65rem;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 18rem;
  background: var(--page);
}

body {
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  padding: 0.75rem 0.75rem 1.25rem;
  padding:
    max(0.75rem, env(safe-area-inset-top))
    max(0.75rem, env(safe-area-inset-right))
    max(1.25rem, env(safe-area-inset-bottom))
    max(0.75rem, env(safe-area-inset-left));
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 0%, var(--page-glow), transparent 34rem),
    var(--page);
  font-size: 1rem;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="checkbox"] {
  cursor: pointer;
}

.page-shell {
  width: min(100%, 56rem);
  margin: clamp(0.4rem, 2.5vw, 2rem) auto 0;
}

.hero {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(0.85rem, 2vw, 1.35rem);
  align-items: start;
  max-width: 52rem;
  margin: 0 0 clamp(1.25rem, 3vw, 2rem);
}

.beads {
  display: grid;
  grid-template-columns: repeat(2, 0.78rem);
  gap: 0.3rem;
  margin-top: 0.45rem;
  padding: 0.6rem;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: color-mix(in srgb, var(--surface) 84%, transparent);
  box-shadow: 0 0.3rem 1rem rgb(31 57 46 / 10%);
}

.beads span {
  width: 0.78rem;
  height: 0.78rem;
  border-radius: 50%;
  background: var(--primary);
}

.beads span:nth-child(2) { background: #d69832; }
.beads span:nth-child(3) { background: #b95543; }
.beads span:nth-child(4) { background: #6f956e; }

.hero-copy {
  min-width: 0;
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1 {
  margin: 0.12rem 0 0.35rem;
  font-size: clamp(1.9rem, 7vw, 3.35rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.introduction {
  max-width: 42rem;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.1rem);
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin: 0.65rem 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.88rem;
  list-style: none;
}

.feature-list li {
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
}

.feature-list li::before {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--primary);
  content: "";
}

.generator-form,
.errors {
  border: 1px solid var(--border);
  border-radius: var(--radius-large);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.generator-form {
  display: grid;
  gap: 0;
  overflow: hidden;
}

.panel {
  min-width: 0;
  margin: 0;
  padding: clamp(1rem, 4vw, 1.5rem);
  border: 0;
  border-bottom: 1px solid var(--border);
}

.panel legend {
  float: left;
  display: flex;
  gap: 0.65rem;
  align-items: center;
  width: 100%;
  margin: 0 0 1rem;
  padding: 0;
  color: var(--ink);
  font-size: 1.1rem;
  font-weight: 800;
}

.panel legend span {
  display: inline-grid;
  flex: 0 0 auto;
  width: 1.7rem;
  height: 1.7rem;
  place-items: center;
  border-radius: 50%;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: 0.82rem;
}

.panel-fields {
  clear: both;
  display: grid;
  gap: 1rem;
  margin-top: 0;
}

.field {
  min-width: 0;
}

.field label {
  display: block;
  margin-bottom: 0.38rem;
  font-weight: 720;
  line-height: 1.3;
}

input,
select {
  width: 100%;
  min-height: 3rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-medium);
  padding: 0.68rem 0.78rem;
  color: var(--ink);
  background: var(--surface-soft);
  font-size: 1rem;
  line-height: 1.25;
}

select {
  appearance: none;
  padding-right: 2.5rem;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 1rem) calc(50% - 0.15rem),
    calc(100% - 0.68rem) calc(50% - 0.15rem);
  background-repeat: no-repeat;
  background-size: 0.34rem 0.34rem;
}

input[type="number"] {
  font-variant-numeric: tabular-nums;
}

input:hover,
select:hover {
  border-color: var(--primary);
}

input:focus,
select:focus,
button:focus {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

input:focus-visible,
select:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

small {
  display: block;
  margin-top: 0.38rem;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 430;
  line-height: 1.4;
}

.paired,
.details-grid,
.action-buttons {
  display: grid;
  gap: 1rem;
}

.check-group {
  display: grid;
  gap: 0.55rem;
}

.check {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
  min-height: 2.75rem;
  margin: 0;
  padding: 0.7rem;
  border: 1px solid transparent;
  border-radius: var(--radius-medium);
  background: var(--surface-soft);
  font-weight: 520;
  line-height: 1.35;
}

.check:hover {
  border-color: var(--border);
}

.check input {
  width: 1.25rem;
  height: 1.25rem;
  margin: 0.08rem 0 0;
  accent-color: var(--primary);
}

.check strong {
  display: block;
}

.check small {
  margin-top: 0.2rem;
}

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

.actions {
  display: grid;
  gap: 1rem;
  padding: clamp(1rem, 4vw, 1.5rem);
  background: var(--surface-soft);
}

.action-copy {
  display: grid;
  gap: 0.18rem;
  align-content: center;
}

.action-copy strong {
  line-height: 1.3;
}

.action-copy span {
  color: var(--muted);
  font-size: 0.88rem;
}

button {
  width: 100%;
  min-height: 3rem;
  margin: 0;
  border: 1px solid var(--primary);
  border-radius: var(--radius-medium);
  padding: 0.72rem 1rem;
  color: var(--button-ink);
  background: var(--primary);
  font-weight: 780;
  line-height: 1.25;
  touch-action: manipulation;
}

button.secondary {
  color: var(--primary);
  background: var(--surface);
}

.errors {
  margin-bottom: 1rem;
  padding: 1rem 1.15rem;
  border-color: var(--error-border);
  color: var(--error);
  background: var(--error-surface);
}

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

.errors ul {
  margin: 0.4rem 0 0;
  padding-left: 1.25rem;
}

.errors li {
  margin-top: 0.2rem;
  overflow-wrap: anywhere;
}

@media (min-width: 22rem) {
  .action-buttons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 30rem) {
  body {
    padding-right: max(1.25rem, env(safe-area-inset-right));
    padding-left: max(1.25rem, env(safe-area-inset-left));
  }

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

@media (min-width: 34rem) {
  .paired {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (orientation: portrait) {
  :root {
    font-size: clamp(18px, 4.8vw, 22px);
  }

  body {
    line-height: 1.55;
  }

  input,
  select,
  button,
  .check {
    min-height: 3.45rem;
  }

  .panel-fields,
  .paired,
  .details-grid,
  .action-buttons {
    gap: 1.1rem;
  }
}

@media (orientation: portrait) and (max-width: 32rem) {
  .action-buttons {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 48rem) and (orientation: landscape) {
  .generator-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .panel-worksheet {
    border-right: 1px solid var(--border);
  }

  .panel-details,
  .actions {
    grid-column: 1 / -1;
  }

  .actions {
    grid-template-columns: minmax(14rem, 1fr) minmax(22rem, 1.2fr);
    align-items: center;
  }
}

@media (orientation: landscape) and (max-height: 40rem) and (min-width: 42rem) {
  body {
    padding-top: max(0.5rem, env(safe-area-inset-top));
  }

  .page-shell {
    margin-top: 0;
  }

  .hero {
    gap: 0.75rem;
    margin-bottom: 0.8rem;
  }

  .beads {
    margin-top: 0.2rem;
    transform: scale(0.88);
    transform-origin: top left;
  }

  h1 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
  }

  .feature-list {
    margin-top: 0.35rem;
  }

  .panel,
  .actions {
    padding: 1rem;
  }
}

@media (hover: hover) and (pointer: fine) {
  button {
    transition: border-color 140ms ease, background-color 140ms ease, color 140ms ease, transform 140ms ease;
  }

  button:hover {
    border-color: var(--primary-strong);
    background: var(--primary-strong);
    transform: translateY(-1px);
  }

  button.secondary:hover {
    color: var(--button-ink);
  }
}

@media (pointer: coarse) {
  input,
  select,
  button {
    min-height: 3.25rem;
  }

  .check {
    min-height: 3.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (forced-colors: active) {
  body,
  .generator-form,
  .panel,
  .actions,
  .check,
  .errors {
    background: Canvas;
    box-shadow: none;
  }

  .beads {
    display: none;
  }

  .panel legend span,
  .feature-list li::before {
    color: CanvasText;
    background: CanvasText;
  }

  input,
  select,
  button,
  .check {
    border-color: CanvasText;
  }

  select {
    appearance: auto;
    background-image: none;
  }
}