/* WorthCheck design system — mobile-first, calm utility brand */
:root {
  --ink: #14212b;
  --ink-soft: #3a4a57;
  --muted: #5c6b78;
  --paper: #f3f6f8;
  --paper-2: #e8eef2;
  --surface: #ffffff;
  --line: #d5dee6;
  --accent: #0f766e;
  --accent-ink: #0b4f4a;
  --accent-soft: #d9f3ef;
  --warn: #9a6700;
  --danger: #9f1239;
  --ok: #0f766e;
  --shadow: 0 12px 40px rgba(20, 33, 43, 0.08);
  --radius: 14px;
  --radius-sm: 10px;
  --max: 1120px;
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-body: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --focus: 0 0 0 3px rgba(15, 118, 110, 0.35);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.6;
  background:
    radial-gradient(1200px 500px at 10% -10%, #d7ebe7 0%, transparent 55%),
    radial-gradient(900px 420px at 100% 0%, #dde6f0 0%, transparent 50%),
    linear-gradient(180deg, #f7fafb 0%, var(--paper) 40%, #eef3f6 100%);
  min-height: 100vh;
}

img { max-width: 100%; height: auto; }
a { color: var(--accent-ink); text-underline-offset: 0.15em; }
a:hover { color: var(--accent); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 1rem; top: -3rem; background: var(--ink); color: #fff;
  padding: 0.6rem 1rem; border-radius: 8px; z-index: 1000;
}
.skip-link:focus { top: 1rem; }

.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(247, 250, 251, 0.88);
  border-bottom: 1px solid rgba(213, 222, 230, 0.8);
}

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 4.25rem;
}

.brand { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; color: inherit; }
.brand-mark {
  width: 2.4rem; height: 2.4rem; border-radius: 0.85rem;
  display: grid; place-items: center; font-weight: 700; color: #fff;
  background: linear-gradient(145deg, #0f766e, #115e59);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; letter-spacing: -0.02em; }
.brand-tag { font-size: 0.78rem; color: var(--muted); }

.site-nav { display: none; gap: 1rem; align-items: center; }
.site-nav a { text-decoration: none; color: var(--ink-soft); font-weight: 600; font-size: 0.95rem; }
.site-nav a[aria-current="page"] { color: var(--accent-ink); }
.site-nav.is-open {
  display: flex; flex-direction: column; position: absolute; left: 0; right: 0; top: 100%;
  background: var(--surface); padding: 1rem 1.25rem 1.25rem; border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.nav-toggle {
  width: 2.75rem; height: 2.75rem; border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface); cursor: pointer; position: relative;
}
.nav-toggle span:not(.sr-only),
.nav-toggle::before,
.nav-toggle::after {
  content: ""; position: absolute; left: 0.7rem; right: 0.7rem; height: 2px; background: var(--ink);
}
.nav-toggle::before { top: 0.9rem; }
.nav-toggle span:not(.sr-only) { top: 1.3rem; display: block; }
.nav-toggle::after { top: 1.7rem; content: ""; }

.btn, button.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  min-height: 3rem; padding: 0.7rem 1.2rem; border-radius: 999px; border: 0;
  background: var(--accent); color: #fff; font-weight: 700; text-decoration: none;
  cursor: pointer; font-size: 1rem; box-shadow: 0 8px 20px rgba(15, 118, 110, 0.22);
}
.btn:hover { background: var(--accent-ink); color: #fff; }
.btn:focus-visible, .nav-toggle:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: none; box-shadow: var(--focus);
}
.btn-secondary {
  background: transparent; color: var(--accent-ink); border: 1.5px solid var(--accent);
  box-shadow: none;
}
.btn-secondary:hover { background: var(--accent-soft); color: var(--accent-ink); }
.btn-small { min-height: 2.4rem; padding: 0.45rem 0.95rem; font-size: 0.9rem; }

.hero {
  padding: 2.5rem 0 2rem;
}
.hero-panel {
  border-radius: calc(var(--radius) + 6px);
  padding: clamp(1.5rem, 4vw, 3rem);
  background:
    linear-gradient(135deg, rgba(255,255,255,0.92), rgba(232,246,243,0.9)),
    linear-gradient(180deg, #fff, #eef5f7);
  border: 1px solid rgba(213,222,230,0.9);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.hero-panel::after {
  content: ""; position: absolute; inset: auto -10% -40% 40%; height: 70%;
  background: radial-gradient(circle, rgba(15,118,110,0.12), transparent 60%);
  pointer-events: none;
}
.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.4rem);
  line-height: 1.02; letter-spacing: -0.03em; margin: 0 0 0.6rem;
}
.hero h1, .page-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 0.75rem;
}
.hero-lead, .lead { color: var(--ink-soft); font-size: 1.12rem; max-width: 42rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }

.section { padding: 2.25rem 0; }
.section-title {
  font-family: var(--font-display); font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 0.5rem; letter-spacing: -0.02em;
}
.section-intro { color: var(--muted); max-width: 40rem; margin-bottom: 1.5rem; }

.scenario-grid, .guide-grid, .feature-grid {
  display: grid; gap: 1rem;
  grid-template-columns: 1fr;
}
.scenario-link, .guide-card, .feature-item {
  display: block; text-decoration: none; color: inherit;
  background: rgba(255,255,255,0.78); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.1rem 1.15rem;
  transition: transform 160ms ease, border-color 160ms ease;
}
.scenario-link:hover, .guide-card:hover { transform: translateY(-2px); border-color: #b7c9c5; }
.scenario-link h3, .guide-card h3, .feature-item h3 {
  margin: 0 0 0.35rem; font-size: 1.1rem; font-family: var(--font-display);
}
.scenario-link p, .guide-card p, .feature-item p { margin: 0; color: var(--muted); font-size: 0.98rem; }
.scenario-emoji { font-size: 1.35rem; margin-bottom: 0.35rem; }

.trust-strip {
  display: grid; gap: 0.75rem; margin-top: 1.5rem;
}
.trust-strip div {
  background: var(--accent-soft); border-radius: var(--radius-sm); padding: 0.85rem 1rem;
  color: var(--accent-ink); font-weight: 600; font-size: 0.95rem;
}

.breadcrumbs { padding: 1rem 0 0; }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.35rem; padding: 0; margin: 0; color: var(--muted); font-size: 0.92rem; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 0.35rem; color: #9aa8b4; }
.breadcrumbs a { color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--accent-ink); }

.prose { max-width: 44rem; }
.prose h2, .prose h3 { font-family: var(--font-display); letter-spacing: -0.02em; }
.prose h2 { margin-top: 2rem; }
.prose p, .prose li { color: var(--ink-soft); }
.prose table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 0.98rem; }
.prose th, .prose td { border: 1px solid var(--line); padding: 0.55rem 0.65rem; text-align: left; }
.prose th { background: var(--paper-2); }

.meta-line { color: var(--muted); font-size: 0.92rem; margin-bottom: 1rem; }

/* Calculator */
.tool-layout { display: grid; gap: 1.25rem; }
.tool-panel, .result-panel, .method-panel {
  background: rgba(255,255,255,0.9); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.15rem;
}
.tool-panel h2, .result-panel h2, .method-panel h2 {
  font-family: var(--font-display); margin: 0 0 0.85rem; font-size: 1.35rem;
}
.field-group { margin-bottom: 1.35rem; padding-bottom: 1rem; border-bottom: 1px solid var(--paper-2); }
.field-group:last-of-type { border-bottom: 0; margin-bottom: 0.5rem; }
.field-group h3 { margin: 0 0 0.75rem; font-size: 1.05rem; }
.field-grid { display: grid; gap: 0.85rem; }
.field { display: grid; gap: 0.3rem; }
.field label { font-weight: 650; font-size: 0.95rem; }
.field .hint { color: var(--muted); font-size: 0.86rem; }
.field input, .field select, .field textarea {
  min-height: 3rem; border: 1px solid var(--line); border-radius: 10px;
  padding: 0.65rem 0.8rem; font: inherit; background: #fff; width: 100%;
}
.field textarea { min-height: 7rem; resize: vertical; }
.optional-block { margin-top: 0.5rem; }
.optional-block summary {
  cursor: pointer; font-weight: 700; color: var(--accent-ink); padding: 0.5rem 0;
}
.tool-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1rem; }
.error-box {
  display: none; margin: 0.75rem 0; padding: 0.75rem 0.9rem; border-radius: 10px;
  background: #fff1f2; color: var(--danger); border: 1px solid #fecdd3;
}
.error-box.is-visible { display: block; }

.pressure-badge {
  display: inline-flex; align-items: center; gap: 0.45rem;
  padding: 0.35rem 0.75rem; border-radius: 999px; font-weight: 800;
  border: 1px solid var(--line); background: var(--paper);
}
.pressure-badge[data-level="comfortable"] { background: #dff7f1; border-color: #99e2d4; color: #0b4f4a; }
.pressure-badge[data-level="manageable"] { background: #eef6ff; border-color: #bfdbfe; color: #1e3a8a; }
.pressure-badge[data-level="tight"] { background: #fff7e8; border-color: #f6d89a; color: #7a5200; }
.pressure-badge[data-level="high_pressure"] { background: #ffe8ee; border-color: #fecdd3; color: #9f1239; }

.result-metrics {
  display: grid; gap: 0.75rem; margin: 1rem 0;
  grid-template-columns: 1fr 1fr;
}
.metric {
  background: var(--paper); border-radius: var(--radius-sm); padding: 0.85rem;
}
.metric .label { display: block; color: var(--muted); font-size: 0.85rem; }
.metric .value { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.02em; }
.metric.wide { grid-column: 1 / -1; }

.result-copy p { color: var(--ink-soft); }
.result-list { padding-left: 1.1rem; color: var(--ink-soft); }
.what-if { margin-top: 1rem; }
.what-if-controls { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  min-height: 2.4rem; padding: 0.35rem 0.8rem; cursor: pointer; font-weight: 650;
}
.chip[aria-pressed="true"] { background: var(--accent-soft); border-color: #7bc5bb; color: var(--accent-ink); }
.disclaimer-box {
  margin-top: 1rem; padding: 0.9rem 1rem; border-radius: var(--radius-sm);
  background: #f8fafc; border: 1px dashed #cbd5e1; color: var(--muted); font-size: 0.92rem;
}

.faq details {
  background: rgba(255,255,255,0.85); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 0.85rem 1rem; margin-bottom: 0.65rem;
}
.faq summary { font-weight: 700; cursor: pointer; }

.site-footer {
  margin-top: 3rem; padding: 2.5rem 0 1.5rem;
  background: #102029; color: #d7e0e7;
}
.footer-grid { display: grid; gap: 1.5rem; }
.footer-brand { font-family: var(--font-display); font-size: 1.4rem; margin: 0; color: #fff; }
.footer-tag, .footer-note { color: #9db0bd; }
.footer-heading { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; color: #8ea0ad; }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.4rem; }
.footer-links a { color: #e7eef3; text-decoration: none; }
.footer-links a:hover { color: #9fe0d6; }
.footer-bottom { margin-top: 2rem; border-top: 1px solid rgba(255,255,255,0.08); padding-top: 1rem; color: #8ea0ad; font-size: 0.92rem; }

.form-success { background: var(--accent-soft); border: 1px solid #99e2d4; padding: 1rem; border-radius: var(--radius-sm); }

@media (min-width: 640px) {
  .scenario-grid, .guide-grid, .feature-grid { grid-template-columns: 1fr 1fr; }
  .field-grid.two { grid-template-columns: 1fr 1fr; }
  .trust-strip { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
}

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .site-nav { display: flex; }
  .tool-layout { grid-template-columns: 1.05fr 0.95fr; align-items: start; }
  .result-panel { position: sticky; top: 5.2rem; }
  .scenario-grid { grid-template-columns: repeat(3, 1fr); }
  .guide-grid { grid-template-columns: repeat(3, 1fr); }
}