:root {
  --paper: #f4f7f5;
  --surface: #ffffff;
  --ink: #182522;
  --muted: #66736f;
  --line: #dbe2de;
  --line-strong: #bdc9c3;
  --teal: #087e78;
  --teal-dark: #05625d;
  --teal-pale: #e3f2ef;
  --yellow: #f0c84b;
  --yellow-pale: #fff6d8;
  --thai: "Noto Sans Thai Looped", "Thonburi", sans-serif;
  --sans: "Noto Sans TC", sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { min-width: 320px; background: var(--paper); }
body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(rgba(24, 37, 34, 0.025) 1px, transparent 1px),
    var(--paper);
  background-size: 100% 28px;
  color: var(--ink);
  font-family: var(--sans);
  letter-spacing: 0;
}

a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid rgba(8, 126, 120, 0.28); outline-offset: 3px; }

.learning-topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: 74px;
  align-items: center;
  justify-content: space-between;
  padding: 10px clamp(18px, 4vw, 58px);
  border-bottom: 1px solid rgba(189, 201, 195, 0.75);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 6px 24px rgba(24, 37, 34, 0.045);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 4px;
  background: var(--ink);
  color: white;
  font-family: var(--thai);
  font-size: 24px;
  font-weight: 600;
}
.brand strong, .brand small { display: block; }
.brand strong { font-family: var(--thai); font-size: 20px; font-weight: 600; }
.brand small { margin-top: -3px; color: var(--muted); font-size: 11px; }
.learning-topbar nav { display: flex; align-items: center; gap: 8px; }
.learning-topbar nav a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
  font-size: 13px;
  font-weight: 600;
}
.learning-topbar nav a:hover { border-color: var(--teal); color: var(--teal-dark); }
.learning-topbar nav svg { width: 18px; height: 18px; stroke-width: 1.8; }

.learning-main { width: min(1180px, calc(100% - 36px)); margin: 0 auto; padding: 42px 0 64px; }
.learning-heading {
  position: relative;
  display: grid;
  min-height: 188px;
  grid-template-columns: minmax(240px, 1.05fr) minmax(380px, 1.35fr) 220px;
  align-items: stretch;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
}
.learning-heading > div:first-child { align-self: center; padding: 30px 34px; }
.eyebrow { margin: 0 0 4px; color: var(--teal-dark); font-size: 10px; font-weight: 700; text-transform: uppercase; }
.learning-heading h1 { margin: 0; font-size: 38px; line-height: 1.2; }
.learning-account { margin: 9px 0 0; color: var(--muted); font-size: 13px; }
.learning-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  margin: 0;
  border-left: 1px solid var(--line);
}
.learning-summary div { display: flex; min-width: 0; align-items: center; justify-content: center; flex-direction: column; padding: 24px 12px; border-right: 1px solid var(--line); }
.learning-summary dt { font-family: var(--thai); font-size: 32px; font-weight: 700; line-height: 1; }
.learning-summary dd { margin: 9px 0 0; color: var(--muted); font-size: 11px; text-align: center; }
.learning-source { position: relative; min-width: 0; margin: 0; overflow: hidden; background: var(--ink); }
.learning-source img { width: 100%; height: 100%; object-fit: cover; object-position: 54% 50%; filter: saturate(0.8) contrast(1.05); opacity: 0.82; }
.learning-source::after { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 35%, rgba(24, 37, 34, 0.88)); content: ""; }
.learning-source figcaption { position: absolute; z-index: 1; right: 18px; bottom: 16px; left: 18px; color: white; }
.learning-source figcaption span, .learning-source figcaption strong { display: block; }
.learning-source figcaption span { font-family: var(--thai); font-size: 15px; }
.learning-source figcaption strong { font-size: 12px; }

.mode-list { margin-top: 34px; border-top: 2px solid var(--ink); }
.mode-list-heading { display: flex; min-height: 74px; align-items: center; justify-content: space-between; padding: 15px 4px; }
.mode-list-heading h2 { margin: 0; font-size: 23px; }
.mode-list-heading > span { color: var(--muted); font-size: 12px; }
.mode-row {
  display: grid;
  min-height: 86px;
  grid-template-columns: 50px 48px minmax(180px, 1fr) minmax(100px, auto) 26px;
  gap: 18px;
  align-items: center;
  padding: 13px 18px 13px 6px;
  border-top: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.62);
  transition: background 150ms ease, color 150ms ease, transform 150ms ease;
}
.mode-row:last-child { border-bottom: 1px solid var(--line-strong); }
.mode-row:hover { z-index: 1; background: var(--surface); color: var(--teal-dark); transform: translateX(4px); }
.mode-number { color: #8b9692; font-size: 11px; font-variant-numeric: tabular-nums; }
.mode-icon { display: grid; width: 44px; height: 44px; place-items: center; border: 1px solid var(--line-strong); border-radius: 5px; background: var(--surface); color: var(--teal-dark); }
.mode-icon svg { width: 21px; height: 21px; stroke-width: 1.7; }
.mode-name strong, .mode-name small { display: block; }
.mode-name strong { font-size: 17px; }
.mode-name small { margin-top: 3px; color: var(--muted); font-size: 11px; }
.mode-count { justify-self: end; padding: 5px 8px; border: 1px solid var(--line); border-radius: 4px; background: var(--surface); color: var(--muted); font-size: 11px; white-space: nowrap; }
.mode-arrow { width: 19px; height: 19px; justify-self: end; }
.mode-row-new { border-top-color: #d7bb55; background: var(--yellow-pale); }
.mode-row-new .mode-icon { border-color: #d7bb55; background: #fffdf4; color: #65520c; }
.mode-row-new:hover { background: #fff2bc; color: #554407; }
.mode-row.is-disabled { opacity: 0.58; }

@media (max-width: 860px) {
  .learning-heading { grid-template-columns: 1fr 1.3fr; }
  .learning-source { display: none; }
}

@media (max-width: 620px) {
  .learning-topbar { min-height: 60px; padding: 8px 14px; }
  .brand-mark { width: 38px; height: 38px; font-size: 21px; }
  .brand { gap: 9px; }
  .brand strong { font-size: 18px; }
  .brand small { display: none; }
  .learning-topbar nav a { width: 42px; min-height: 42px; justify-content: center; padding: 0; }
  .learning-topbar nav span { display: none; }
  .learning-main { width: 100%; padding: 18px 14px 42px; }
  .learning-heading { display: block; min-height: 0; }
  .learning-heading > div:first-child { padding: 22px 20px 18px; }
  .learning-heading h1 { font-size: 31px; }
  .learning-summary { min-height: 92px; border-top: 1px solid var(--line); border-left: 0; }
  .learning-summary div:last-child { border-right: 0; }
  .learning-summary dt { font-size: 25px; }
  .learning-summary dd { font-size: 10px; }
  .mode-list { margin-top: 24px; }
  .mode-list-heading { min-height: 66px; }
  .mode-list-heading h2 { font-size: 20px; }
  .mode-row {
    min-height: 78px;
    grid-template-columns: 38px 42px minmax(0, 1fr) 20px;
    gap: 10px;
    padding: 11px 8px 11px 2px;
  }
  .mode-icon { width: 40px; height: 40px; }
  .mode-name strong { font-size: 15px; }
  .mode-count { display: none; }
  .mode-row:hover { transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .mode-row { transition: none; }
}