:root {
  --bg: #0b0d10;
  --fg: #e8eaed;
  --muted: #9aa0a6;
  --panel: #15181e;
  --border: color-mix(in srgb, var(--fg) 12%, transparent);
  --accent: #7dd3fc;
  --accent-dim: color-mix(in srgb, var(--accent) 16%, var(--panel));
  --warn: #fbbf24;
  --danger: #f87171;
  --ok: #4ade80;
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius: 14px;
  --shadow: 0 12px 36px color-mix(in srgb, #000 40%, transparent);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f5f7;
    --fg: #1a1d23;
    --muted: #5f6368;
    --panel: #ffffff;
    --border: color-mix(in srgb, var(--fg) 12%, transparent);
    --accent: #0369a1;
    --accent-dim: color-mix(in srgb, var(--accent) 10%, var(--panel));
    --shadow: 0 10px 28px color-mix(in srgb, #000 10%, transparent);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  min-height: 100dvh;
  background:
    radial-gradient(900px 500px at 10% -10%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 55%),
    var(--bg);
  color: var(--fg);
  font-family: var(--font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  padding:
    max(1.25rem, env(safe-area-inset-top))
    max(1.25rem, env(safe-area-inset-right))
    max(2rem, env(safe-area-inset-bottom))
    max(1.25rem, env(safe-area-inset-left));
}

main { width: min(42rem, 100%); margin: 0 auto; }
main.wide { width: min(48rem, 100%); }

.eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

h1 {
  font-size: clamp(1.55rem, 4vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.55rem;
}

h2 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
  letter-spacing: -0.01em;
}

.lede { color: var(--muted); font-size: 1.02rem; }
p + p { margin-top: 0.7rem; }
ul, ol { padding-left: 1.2rem; margin-top: 0.45rem; }
li { margin: 0.35rem 0; }
li::marker { color: var(--muted); }

section, .panel-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.callout {
  border-left: 3px solid var(--warn);
  padding: 0.65rem 0.85rem;
  background: color-mix(in srgb, var(--warn) 8%, var(--panel));
  border-radius: 0 10px 10px 0;
  font-size: 0.92rem;
  color: var(--muted);
  margin-top: 0.85rem;
}
.callout strong { color: var(--fg); }
.callout.danger {
  border-left-color: var(--danger);
  background: color-mix(in srgb, var(--danger) 8%, var(--panel));
}
.callout.ok {
  border-left-color: var(--ok);
  background: color-mix(in srgb, var(--ok) 8%, var(--panel));
}

.links { display: flex; flex-direction: column; gap: 0.75rem; }

a.card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--accent-dim);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
  border-radius: 12px;
  padding: 1rem 1.05rem;
  min-height: 3.5rem;
  transition: border-color 0.15s ease, transform 0.15s ease, background 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}
a.card:hover { border-color: var(--accent); transform: translateY(-1px); }
a.card:active { transform: translateY(0); }
a.card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
a.card.primary {
  background: color-mix(in srgb, var(--accent) 22%, var(--panel));
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
}

.card-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.25rem;
}
.card-title { font-weight: 700; font-size: 1.02rem; line-height: 1.3; margin-bottom: 0.25rem; }
.card-desc { font-size: 0.9rem; color: var(--muted); line-height: 1.4; }
.card-url {
  margin-top: 0.45rem;
  font-size: 0.78rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: color-mix(in srgb, var(--accent) 75%, var(--muted));
  word-break: break-all;
}

footer {
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
  line-height: 1.45;
}
footer a { color: var(--muted); }

.back {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
}
.back:hover { color: var(--accent); }

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 12px;
  font: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.7rem 1rem;
  min-height: 2.75rem;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  color: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}
.btn-primary { background: var(--accent); color: #041018; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-secondary {
  background: var(--accent-dim);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  color: var(--fg);
}
.btn-secondary:hover { border-color: var(--accent); }
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--muted);
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.actions { display: flex; flex-wrap: wrap; gap: 0.55rem; }
.actions .btn { flex: 1 1 auto; }

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem 0.75rem;
  margin-bottom: 1rem;
}
@media (max-width: 420px) { .grid { grid-template-columns: 1fr; } }

label.field {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
}
label.field.span2 { grid-column: 1 / -1; }

input[type="number"],
input[type="text"],
select {
  appearance: none;
  width: 100%;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--fg);
  background: color-mix(in srgb, var(--fg) 5%, var(--panel));
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
  min-height: 2.5rem;
}
input:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.hint {
  margin-top: 0.85rem;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.45;
}
.hint kbd {
  font: inherit;
  font-size: 0.78em;
  font-weight: 700;
  padding: 0.08em 0.35em;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--fg) 6%, var(--panel));
}

.nausea-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.75rem 0 0.5rem;
}
.nausea-scale button {
  appearance: none;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--fg) 5%, var(--panel));
  color: var(--fg);
  font: inherit;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
}
.nausea-scale button:hover { border-color: var(--accent); }
.nausea-scale button.selected {
  background: var(--accent);
  color: #041018;
  border-color: var(--accent);
}
.nausea-scale button.high {
  border-color: color-mix(in srgb, var(--danger) 50%, var(--border));
}
.nausea-scale button.high.selected {
  background: var(--danger);
  color: #1a0505;
  border-color: var(--danger);
}
.nausea-label {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

.step-list { list-style: none; padding: 0; margin: 0.5rem 0 0; }
.step-list li {
  display: flex;
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  margin: 0;
}
.step-list li:last-child { border-bottom: none; }
.step-num {
  flex: 0 0 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.82rem;
  display: grid;
  place-items: center;
}
.step-body { flex: 1; font-size: 0.92rem; }
.step-body strong { display: block; margin-bottom: 0.15rem; }

.progress-bar {
  height: 6px;
  background: color-mix(in srgb, var(--fg) 8%, var(--panel));
  border-radius: 999px;
  overflow: hidden;
  margin: 0.75rem 0 1rem;
}
.progress-bar > span {
  display: block;
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.25s ease;
}

.checklist-item {
  display: grid;
  gap: 0.55rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
}
.checklist-item:last-child { border-bottom: none; }
.checklist-item.done { opacity: 0.7; }
.checklist-item h3 { font-size: 0.98rem; font-weight: 700; }
.checklist-item p { font-size: 0.88rem; color: var(--muted); }

.seg {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 0.85rem;
}
.seg button {
  flex: 1;
  appearance: none;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--fg) 4%, var(--panel));
  color: var(--muted);
  font: inherit;
  font-weight: 700;
  font-size: 0.88rem;
  padding: 0.55rem 0.5rem;
  border-radius: 10px;
  cursor: pointer;
  min-height: 2.4rem;
}
.seg button.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--fg);
}

.inline-link { color: var(--accent); font-weight: 600; text-decoration: none; }
.inline-link:hover { text-decoration: underline; }