:root {
  --bg: #FFFFFF;
  --mint: #EDF7F5;
  --ink: #193B4A;
  --muted: #4E6A75;
  --line: #D7E4E2;
  --teal: #257F80;
  --teal-dark: #1D6667;
  --apricot: #F8DCC4;
  --max: 1120px;
  --sans: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --radius: 14px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.55;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--teal); text-underline-offset: 0.12em; }
a:hover { color: var(--teal-dark); }
:focus-visible { outline: 3px solid var(--teal); outline-offset: 2px; }
.shell { width: min(100% - 1.5rem, var(--max)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 4.2rem;
}
.brand { display: inline-flex; align-items: center; text-decoration: none; color: var(--ink); }
.brand img, .brand svg { height: 34px; width: auto; }
.nav-tools { display: flex; align-items: center; gap: .55rem; }
.nav { display: none; list-style: none; margin: 0; padding: 0; gap: .95rem; }
.nav a {
  color: var(--ink); text-decoration: none; font-weight: 650; font-size: .95rem;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--teal); }
.quick-link { color: var(--teal); font-weight: 700; text-decoration: none; font-size: .95rem; }
.icon-btn, .menu-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.4rem; height: 2.4rem; border-radius: 10px;
  border: 1px solid var(--line); background: #fff; color: var(--ink); cursor: pointer;
}
.mobile-nav { border-top: 1px solid var(--line); background: #fff; }
.mobile-nav ul { list-style: none; margin: 0; padding: .75rem 0 1rem; }
.mobile-nav a { display: block; padding: .55rem 0; color: var(--ink); text-decoration: none; font-weight: 650; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .35rem;
  padding: .65rem 1.05rem; border-radius: 10px; font: inherit; font-weight: 700;
  text-decoration: none; border: 2px solid transparent; cursor: pointer;
}
.btn-teal { background: var(--teal); color: #fff; }
.btn-teal:hover { background: var(--teal-dark); color: #fff; }
.btn-outline { background: #fff; color: var(--teal); border-color: var(--teal); }
.btn-outline:hover { background: var(--mint); color: var(--teal-dark); }
.btn-wide { width: 100%; }

.hero {
  background: var(--mint);
  padding: 2.2rem 0 1.4rem;
}
.hero-grid {
  display: grid; gap: 1.5rem; align-items: center;
}
.hero h1 {
  margin: 0 0 .7rem; font-size: clamp(1.85rem, 4vw, 2.7rem);
  line-height: 1.15; letter-spacing: -0.02em;
}
.hero .lead { margin: 0; color: var(--muted); font-size: 1.12rem; max-width: 34rem; }
.hero-art { justify-self: center; width: min(100%, 420px); }

.search-panel {
  margin-top: 1.4rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  padding: 1rem;
  box-shadow: 0 10px 30px rgba(25,59,74,.06);
}
.search-panel-grid {
  display: grid; gap: .75rem;
}
.search-panel label { display: grid; gap: .3rem; font-weight: 700; font-size: .92rem; }
.search-panel input, .search-panel select {
  width: 100%; font: inherit; padding: .7rem .8rem;
  border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--ink);
}
.search-note { margin: .65rem 0 0; color: var(--muted); font-size: .9rem; }

.section { padding: 2.4rem 0; }
.section h2 {
  margin: 0 0 1.1rem; font-size: clamp(1.35rem, 2.5vw, 1.85rem); letter-spacing: -0.015em;
}
.section-mint { background: var(--mint); }
.muted { color: var(--muted); }

.topic-grid {
  display: grid; gap: .85rem;
  grid-template-columns: 1fr;
}
.topic-card {
  display: grid; grid-template-columns: auto 1fr auto; gap: .85rem; align-items: start;
  padding: 1rem 1.05rem; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; text-decoration: none; color: var(--ink);
  transition: border-color .15s ease, transform .15s ease;
}
.topic-card:hover { border-color: var(--teal); transform: translateY(-1px); color: var(--ink); }
.topic-card .icon { color: var(--teal); }
.topic-card h3 { margin: 0 0 .25rem; font-size: 1.05rem; }
.topic-card p { margin: 0; color: var(--muted); font-size: .92rem; }
.topic-card .go { color: var(--teal); align-self: center; }

.start-band {
  background: var(--apricot);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  display: grid; gap: 1rem; align-items: center;
}
.start-band p { margin: .2rem 0 0; color: var(--ink); }
.start-band strong { font-size: 1.15rem; }

.steps {
  display: grid; gap: 1rem;
}
.step {
  display: grid; grid-template-columns: auto 1fr; gap: .85rem; align-items: start;
  padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: #fff;
}
.step-num {
  width: 2.4rem; height: 2.4rem; border-radius: 999px; background: var(--mint);
  color: var(--teal); display: grid; place-items: center; font-weight: 800; font-size: .85rem;
}
.step h3 { margin: 0 0 .25rem; font-size: 1.05rem; }
.step p { margin: 0; color: var(--muted); font-size: .95rem; }

.info-grid {
  display: grid; gap: 1.2rem;
}
.info-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .85rem; }
.info-list li {
  display: grid; grid-template-columns: auto 1fr; gap: .75rem; align-items: start;
}
.info-list .icon { color: var(--teal); }
.info-list strong { display: block; }
.info-list span { color: var(--muted); font-size: .95rem; }

.sample-card {
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 1.1rem;
}
.sample-card .eyebrow {
  display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; color: var(--muted); margin-bottom: .5rem;
}
.sample-card h3 { margin: 0 0 .4rem; }
.sample-meta { display: grid; gap: .35rem; margin: .8rem 0 1rem; color: var(--muted); font-size: .92rem; }

.guide-grid {
  display: grid; gap: 1rem;
}
.guide-card {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: #fff; text-decoration: none; color: var(--ink);
  display: grid;
}
.guide-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.guide-card div { padding: .95rem 1rem 1.1rem; }
.guide-card h3 { margin: 0 0 .35rem; font-size: 1.05rem; }
.guide-card p { margin: 0; color: var(--muted); font-size: .92rem; }

.cta-row {
  display: grid; gap: .85rem;
}
.cta-box {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem;
  display: grid; gap: .85rem; align-items: center; background: #fff;
}
.cta-box.mint { background: var(--mint); border-color: transparent; }
.cta-box h3 { margin: 0; font-size: 1.15rem; }
.cta-box p { margin: .25rem 0 0; color: var(--muted); }

.site-footer {
  border-top: 1px solid var(--line); padding: 2rem 0 2.4rem; margin-top: 1rem;
}
.footer-grid {
  display: grid; gap: 1.2rem;
}
.footer-brand p { margin: .45rem 0 0; color: var(--muted); }
.footer-nav { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .75rem 1.1rem; }
.footer-nav a { color: var(--ink); text-decoration: none; font-weight: 650; }
.footer-nav a:hover { color: var(--teal); }
.footer-note { color: var(--muted); font-size: .9rem; margin: 0; max-width: 28rem; }

.page-hero { background: var(--mint); padding: 1.8rem 0 1.4rem; }
.page-hero h1 { margin: 0 0 .45rem; font-size: clamp(1.6rem, 3vw, 2.2rem); }
.page-hero p { margin: 0; color: var(--muted); max-width: 40rem; }
.page-main { padding: 1.5rem 0 2.5rem; }
.page-surface {
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 1.15rem 1.2rem;
}

.result-list { display: grid; gap: .85rem; }
.result-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; background: #fff;
}
.result-card h2, .result-card h3 { margin: 0 0 .35rem; font-size: 1.15rem; }
.result-card h2 a, .result-card h3 a { color: var(--ink); text-decoration: none; }
.result-card h2 a:hover, .result-card h3 a:hover { color: var(--teal); }
.result-meta { display: flex; flex-wrap: wrap; gap: .45rem .75rem; color: var(--muted); font-size: .9rem; margin: .4rem 0 .6rem; }
.chip {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .15rem .55rem; border-radius: 999px; background: var(--mint); color: var(--teal-dark);
  font-size: .8rem; font-weight: 700;
}

.filters {
  display: grid; gap: .75rem; margin-bottom: 1rem;
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; background: #fff;
}
.filters-grid { display: grid; gap: .7rem; }
.filters label { display: grid; gap: .25rem; font-weight: 700; font-size: .9rem; }
.filters select, .filters input {
  font: inherit; padding: .55rem .7rem; border: 1px solid var(--line); border-radius: 10px;
}

.detail-grid { display: grid; gap: 1rem; }
.detail-block h2 { margin: 0 0 .45rem; font-size: 1.1rem; }
.detail-block p, .detail-block li { color: var(--ink); }
.detail-block ul { margin: .3rem 0 0; padding-left: 1.1rem; }
.prose { white-space: pre-wrap; }
.escape-bar {
  position: sticky; top: 0; z-index: 50;
  background: #193B4A; color: #fff; padding: .55rem .85rem;
  display: flex; justify-content: space-between; gap: .75rem; align-items: center; flex-wrap: wrap;
}
.escape-bar a { color: #fff; font-weight: 700; }
.escape-note { font-size: .85rem; opacity: .9; }

.form-grid { display: grid; gap: .75rem; max-width: 36rem; }
.form-grid label { display: grid; gap: .3rem; font-weight: 700; }
.form-grid input, .form-grid textarea, .form-grid select {
  font: inherit; padding: .65rem .75rem; border: 1px solid var(--line); border-radius: 10px;
}
.form-grid .check { display: flex; gap: .5rem; align-items: flex-start; font-weight: 500; }
.notice { padding: .75rem .9rem; border-radius: 10px; margin-bottom: .75rem; }
.notice-ok { background: #E7F5EF; color: #1F5B34; }
.notice-err { background: #FCE8E2; color: #7A2E1A; }
.notice-info { background: var(--mint); color: var(--ink); }
.empty { color: var(--muted); padding: .5rem 0; }

@media (min-width: 760px) {
  .nav { display: flex; }
  .menu-btn { display: none; }
  .hero-grid { grid-template-columns: 1.15fr .85fr; }
  .search-panel-grid { grid-template-columns: 1.4fr .9fr auto; align-items: end; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .info-grid { grid-template-columns: 1.1fr .9fr; align-items: start; }
  .guide-grid { grid-template-columns: repeat(3, 1fr); }
  .cta-row { grid-template-columns: 1fr 1fr; }
  .start-band { grid-template-columns: auto 1fr auto; }
  .footer-grid { grid-template-columns: 1.1fr 1fr 1.1fr; align-items: start; }
  .filters-grid { grid-template-columns: repeat(4, 1fr) auto; align-items: end; }
  .detail-grid { grid-template-columns: 1.2fr .8fr; }
}
@media (min-width: 980px) {
  .topic-grid { grid-template-columns: repeat(4, 1fr); }
  .topic-card { grid-template-columns: 1fr; min-height: 10.5rem; }
  .topic-card .go { justify-self: start; }
}