/* LMU v2 — calm, mobile-first shell (distinct from ship red-gold drama) */
:root {
  --ink: #1c2428;
  --muted: #5a6a72;
  --paper: #f7f6f2;
  --card: #ffffff;
  --line: #e2e6e8;
  --accent: #2f6f6a;
  --accent-deep: #1e4d49;
  --accent-soft: #e8f3f1;
  --warm: #c45c3a;
  --warm-soft: #fbf0eb;
  --gold: #b08948;
  --gold-soft: #f8f1e3;
  --danger: #8b1e2d;
  --danger-soft: #f8e8ea;
  --radius: 16px;
  --shadow: 0 10px 28px rgba(28, 36, 40, 0.06);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Noto Serif SC", "Songti SC", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.65;
  font-size: 17px;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }

.page { max-width: 720px; margin: 0 auto; min-height: 100vh; }

.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 16px;
  background: rgba(247, 246, 242, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand img {
  width: 40px; height: 40px; border-radius: 10px; object-fit: cover; background: #fff;
}
.brand-title { display: block; font-size: 17px; font-weight: 800; letter-spacing: 0.01em; }
.brand-sub { display: block; font-size: 12px; color: var(--muted); margin-top: -2px; }
.nav-links { display: flex; flex-wrap: wrap; gap: 6px; }
.nav-links a {
  font-size: 13px; font-weight: 700; color: var(--accent-deep);
  padding: 7px 10px; border-radius: 999px;
}
.nav-links a:hover { background: var(--accent-soft); }

.soft-banner {
  margin: 0; padding: 10px 16px; text-align: center;
  background: var(--gold-soft); color: #6a5224;
  font-size: 13px; border-bottom: 1px solid #ead9b8;
}

.hero { padding: 40px 16px 28px; text-align: left; }
.hero-mark {
  width: 72px; height: 72px; border-radius: 50%;
  object-fit: cover; display: block; margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(34px, 9vw, 48px);
  line-height: 1.15;
  font-weight: 900;
  color: var(--accent-deep);
  letter-spacing: -0.02em;
}
.hero .lead {
  margin: 0 0 18px;
  font-size: 18px;
  color: var(--muted);
  max-width: 36em;
}
.motto {
  display: inline-block;
  margin: 0 0 22px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.principles {
  display: grid; gap: 8px; margin: 20px 0 0; padding: 0; list-style: none;
}
.principles li {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 12px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 15px;
}
.principles b {
  flex: 0 0 auto;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.section { padding: 36px 16px; }
.section h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 6vw, 32px);
  line-height: 1.25;
  color: var(--ink);
}
.section .eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
}
.section > p { margin: 0 0 18px; color: var(--muted); font-size: 16px; }

.stuck-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 8px;
}
@media (min-width: 560px) {
  .stuck-grid { grid-template-columns: 1fr 1fr; }
}

.stuck-card {
  display: flex; flex-direction: column; gap: 8px;
  padding: 18px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-height: 140px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.stuck-card:hover {
  border-color: rgba(47, 111, 106, 0.45);
  transform: translateY(-1px);
}
.stuck-card .tag {
  font-size: 12px; font-weight: 800; color: var(--accent);
  letter-spacing: 0.04em;
}
.stuck-card strong {
  font-size: 18px; line-height: 1.35; color: var(--ink);
}
.stuck-card span {
  font-size: 14px; color: var(--muted); line-height: 1.55;
  margin-top: auto;
}

.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 10px 18px;
  border-radius: 999px; font-size: 15px; font-weight: 800;
  border: 1px solid var(--line); background: var(--card); color: var(--accent-deep);
}
.btn.primary {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.btn.ghost { background: transparent; }

.footer {
  padding: 36px 16px 48px;
  background: #1c2428;
  color: #e8eeef;
  margin-top: 24px;
}
.footer h2 { margin: 0 0 8px; font-size: 18px; color: #fff; }
.footer p { margin: 6px 0; font-size: 14px; color: #b7c4c8; }
.footer a { color: #9fd4ce; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }

/* Manifesto */
.manifesto {
  padding: 32px 16px 48px;
  max-width: 36em;
}
.manifesto .eyebrow { color: var(--accent); font-weight: 800; font-size: 13px; }
.manifesto h1 {
  margin: 6px 0 14px;
  font-size: clamp(28px, 7vw, 40px);
  color: var(--accent-deep);
}
.manifesto .prose {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.9;
  color: #2a3236;
}
.manifesto .prose p { margin: 0 0 1em; }
.manifesto .prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.3em;
}
.manifesto .prose li { margin: 0.35em 0; }
.safety-note {
  margin-top: 1.2em;
  padding: 14px 16px;
  background: var(--danger-soft);
  border-radius: 12px;
  border: 1px solid #e8c5cb;
  font-size: 15px;
  color: #5c2430;
}

/* Resources */
.urgent-box {
  margin: 18px 0;
  padding: 18px 16px;
  border-radius: 14px;
  background: var(--danger);
  color: #fff;
}
.urgent-box strong { font-size: 20px; display: block; }
.urgent-box p { margin: 8px 0 0; color: #fff; font-size: 16px; }
.resource-grid { display: grid; gap: 12px; margin: 20px 0; }
.resource-grid article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
}
.resource-grid h2 { margin: 0 0 10px; font-size: 20px; }
.resource-grid p { margin: 0 0 8px; font-size: 15px; color: var(--muted); }
.warning {
  background: var(--warm-soft);
  border: 1px solid #ebd5cb;
  border-radius: 12px;
  padding: 14px;
  color: #5d4542;
  font-size: 15px;
}

/* Course list */
.gold-block {
  background: linear-gradient(160deg, #fff, var(--gold-soft));
  border: 1px solid #e5d4b0;
  border-radius: var(--radius);
  padding: 18px 16px;
  margin-bottom: 28px;
}
.gold-block h2 { margin: 0 0 8px; font-size: 22px; color: #6a5224; }
.day-list { display: grid; gap: 10px; margin-top: 12px; }
.day-list a {
  display: block;
  padding: 14px 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.day-list a.gold {
  border-color: rgba(176, 137, 72, 0.55);
  background: linear-gradient(135deg, #fff, #fff9eb);
}
.day-list strong { display: block; font-size: 16px; line-height: 1.4; }
.day-list span { display: block; margin-top: 4px; font-size: 13px; color: var(--muted); }
.muted-list a { opacity: 0.85; }

.hub-list { display: grid; gap: 10px; }
.hub-list a {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.hub-list b { color: var(--accent); min-width: 4.5em; font-size: 13px; }
.hub-list span { font-size: 15px; line-height: 1.45; }

.backlink {
  display: inline-flex; margin: 0 0 16px;
  color: var(--accent); font-weight: 800; font-size: 14px;
}

/* Notice strip on gold lessons */
.v2-revise-notice {
  margin: 0;
  padding: 10px 16px;
  text-align: center;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 13px;
  font-weight: 700;
  border-bottom: 1px solid #cfe3df;
}

@media (max-width: 520px) {
  .nav-links { display: none; }
  .hero { padding-top: 28px; }
}

/* course100 + hubs extras */
.gold-block { scroll-margin-top: 72px; }
.muted-list a { opacity: 0.9; }
.day-list a.gold strong { color: #5c4518; }
.backlink, .backlink {
  display: inline-flex; margin: 0 0 14px;
  color: var(--accent); font-weight: 800; font-size: 14px;
}
.section .cta-row { margin-top: 20px; }
.topbar .nav-links a { font-size: 13px; font-weight: 700; color: var(--accent-deep); padding: 7px 10px; }