:root {
  --accent: #1F3864;
  --accent-light: #2a4a7a;
  --accent-soft: #e8eef6;
  --bg: #f7f8fb;
  --card: #ffffff;
  --text: #1a1a2e;
  --muted: #5a6474;
  --border: #d8dee8;
  --warn: #8b2942;
  --warn-bg: #fdf2f4;
  --ok: #1a5c3a;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(31, 56, 100, 0.08);
  --max: 920px;
  --font: "Noto Sans TC", "Microsoft JhengHei", "PingFang TC", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  background: var(--accent);
  color: #fff;
  padding: 0.85rem 1.25rem;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.site-header .inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-header .brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  text-decoration: none;
}
.site-header .brand:hover { text-decoration: none; opacity: 0.9; }
.site-header nav { display: flex; gap: 0.85rem; flex-wrap: wrap; }
.site-header nav a {
  color: rgba(255,255,255,0.9);
  font-size: 0.9rem;
  text-decoration: none;
}
.site-header nav a:hover { color: #fff; text-decoration: underline; }

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.18);
  color: #fff;
  vertical-align: middle;
  margin-left: 0.4rem;
}

main {
  flex: 1;
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 3rem;
}

.hero {
  text-align: center;
  padding: 1.5rem 0 0.5rem;
}
.hero h1 {
  color: var(--accent);
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin: 0 0 0.5rem;
  line-height: 1.35;
}
.hero .pitch {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto 1.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.35rem;
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(31, 56, 100, 0.12);
}
.card h2 {
  margin: 0 0 0.4rem;
  color: var(--accent);
  font-size: 1.2rem;
}
.card .tag {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
}
.card p { margin: 0 0 1rem; color: var(--text); flex: 1; font-size: 0.95rem; }
.card .meta { font-size: 0.85rem; color: var(--muted); margin-bottom: 1rem; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff !important;
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none !important;
  text-align: center;
  border: none;
  cursor: pointer;
}
.btn:hover { background: var(--accent-light); }
.btn-outline {
  background: transparent;
  color: var(--accent) !important;
  border: 2px solid var(--accent);
}
.btn-outline:hover { background: var(--accent-soft); }

.section-title {
  color: var(--accent);
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid var(--accent-soft);
}
.downloads-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.downloads-list li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  margin-bottom: 0.65rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.downloads-list .desc { color: var(--muted); font-size: 0.88rem; }

.module-list { list-style: none; padding: 0; margin: 1rem 0; }
.module-list li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.7rem;
  transition: border-color 0.15s;
}
.module-list li:hover { border-color: var(--accent); }
.module-list a {
  display: block;
  padding: 1rem 1.15rem;
  text-decoration: none;
  color: inherit;
}
.module-list a:hover { text-decoration: none; }
.module-list .num {
  display: inline-block;
  width: 1.8rem;
  height: 1.8rem;
  line-height: 1.8rem;
  text-align: center;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  font-size: 0.85rem;
  font-weight: 700;
  margin-right: 0.6rem;
}
.module-list .title { font-weight: 600; color: var(--accent); }
.module-list .hours { font-size: 0.85rem; color: var(--muted); margin-top: 0.25rem; }

.breadcrumb {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 1rem;
}
.breadcrumb a { color: var(--accent); }

.lesson h1 {
  color: var(--accent);
  font-size: clamp(1.3rem, 3.5vw, 1.7rem);
  margin: 0 0 0.35rem;
  line-height: 1.35;
}
.lesson .subtitle { color: var(--muted); margin: 0 0 1.25rem; font-size: 0.95rem; }
.lesson h2 {
  color: var(--accent);
  font-size: 1.15rem;
  margin: 1.75rem 0 0.6rem;
}
.lesson h3 {
  color: var(--accent-light);
  font-size: 1.02rem;
  margin: 1.25rem 0 0.45rem;
}
.lesson ul, .lesson ol { padding-left: 1.35rem; }
.lesson li { margin-bottom: 0.35rem; }
.objectives {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  padding: 0.9rem 1.1rem;
  border-radius: 0 8px 8px 0;
  margin: 1rem 0 1.5rem;
}
.objectives h2 { margin-top: 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1.25rem;
  font-size: 0.92rem;
  background: var(--card);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
th, td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.7rem;
  text-align: left;
  vertical-align: top;
}
th {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
}
tr:nth-child(even) td { background: #fafbfd; }

.callout {
  background: var(--warn-bg);
  border: 1px solid #e8c0c8;
  border-left: 4px solid var(--warn);
  padding: 0.85rem 1rem;
  border-radius: 0 8px 8px 0;
  margin: 1rem 0;
  font-size: 0.92rem;
  color: #4a2030;
}
.callout strong { color: var(--warn); }

.sample-tag {
  display: inline-block;
  background: #fff3cd;
  color: #7a5c00;
  border: 1px dashed #c9a227;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

.nav-modules {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 2rem 0 1rem;
  flex-wrap: wrap;
}
.nav-modules a {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 0.65rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}
.nav-modules a:hover { background: var(--accent-soft); }

.cta-box {
  background: var(--accent-soft);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin: 1.5rem 0;
}
.cta-box h3 { margin: 0 0 0.4rem; color: var(--accent); font-size: 1rem; }
.cta-box p { margin: 0 0 0.75rem; font-size: 0.92rem; color: var(--muted); }

.site-footer {
  background: #152a4a;
  color: rgba(255,255,255,0.85);
  padding: 1.25rem 1.25rem 1.5rem;
  font-size: 0.82rem;
  line-height: 1.55;
}
.site-footer .inner {
  max-width: 1100px;
  margin: 0 auto;
}
.site-footer strong { color: #fff; }
.site-footer ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}
.site-footer a { color: #a8c4e8; }
.site-footer .red-lines li { margin-bottom: 0.25rem; }

.level {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  margin-right: 0.35rem;
  vertical-align: middle;
}
.level-beginner { background: #d4edda; color: #155724; }
.level-inter { background: #fff3cd; color: #856404; }
.level-adv { background: #f8d7da; color: #721c24; }

code, .mono {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: #eef1f6;
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

@media (max-width: 600px) {
  main { padding: 1.25rem 1rem 2.5rem; }
  table { font-size: 0.82rem; }
  th, td { padding: 0.4rem 0.45rem; }
  .site-header .brand { font-size: 0.95rem; }
}

/* Practice cards & collapsible answers */
.practice-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.1rem 1.25rem;
  margin: 1.5rem 0;
  box-shadow: var(--shadow);
}
.practice-card h2 {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 1.1rem;
}
.practice-card .firm {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}
.practice-card details {
  margin-top: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fafbfd;
  padding: 0.35rem 0.85rem 0.85rem;
}
.practice-card summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--accent);
  padding: 0.55rem 0;
  list-style: none;
}
.practice-card summary::-webkit-details-marker { display: none; }
.practice-card summary::before {
  content: "▸ ";
  color: var(--accent);
}
.practice-card details[open] summary::before { content: "▾ "; }
.practice-card .answer {
  font-size: 0.92rem;
  border-top: 1px dashed var(--border);
  padding-top: 0.65rem;
  margin-top: 0.25rem;
}
.practice-card .answer ol, .practice-card .answer ul { margin: 0.4rem 0; }

/* Checklist steps */
.checklist-steps { counter-reset: step; list-style: none; padding: 0; margin: 1rem 0; }
.checklist-steps > li {
  counter-increment: step;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem 1rem 3.2rem;
  margin-bottom: 0.85rem;
  position: relative;
  box-shadow: var(--shadow);
}
.checklist-steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0.85rem;
  top: 1rem;
  width: 1.75rem;
  height: 1.75rem;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}
.checklist-steps h3 { margin: 0 0 0.35rem; color: var(--accent); font-size: 1.05rem; }

.paste-template {
  background: #1a1a2e;
  color: #e8eef6;
  border-radius: 8px;
  padding: 1rem 1.1rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-x: auto;
  margin: 0.75rem 0 1rem;
}

.sheet-tour { margin: 1.25rem 0; }
.sheet-tour article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin-bottom: 0.85rem;
  box-shadow: var(--shadow);
}
.sheet-tour h3 {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-size: 1.05rem;
}
.sheet-tour .sheet-meta {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.scenario-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin: 1rem 0;
  box-shadow: var(--shadow);
}
.scenario-card h3 { margin: 0 0 0.4rem; color: var(--accent); }
.scenario-card .choices { margin: 0.5rem 0; }
.scenario-card .choices label {
  display: block;
  padding: 0.4rem 0.6rem;
  margin: 0.25rem 0;
  border-radius: 6px;
  background: #fafbfd;
  border: 1px solid var(--border);
  cursor: default;
  font-size: 0.92rem;
}
.scenario-card details { margin-top: 0.75rem; }
.scenario-card summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--accent);
}

.subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 1.5rem;
}
.subnav a {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
}
.subnav a:hover { background: var(--accent); color: #fff; text-decoration: none; }

.appendix-links {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}
.appendix-links li {
  margin: 0.4rem 0;
}
.appendix-links a {
  font-weight: 600;
}

.prompt-block {
  background: #f0f4fa;
  border-left: 3px solid var(--accent);
  padding: 0.85rem 1rem;
  margin: 0.75rem 0 1.25rem;
  border-radius: 0 8px 8px 0;
  font-size: 0.92rem;
}