:root {
  --paper: #FAF8FB;
  --lavender: #E9E3F0;
  --ink: #2D2440;
  --ink-soft: #4B4160;
  --muted: #655B78;
  --line: #DDD5E6;
  --seal: #B0362B;
  --on-ink: #FAF8FB;
  --on-ink-soft: #CFC6DC;
  --on-ink-line: #4A4060;

  --font: "Literata", "Noto Serif SC", Georgia, serif;
  --font-zh: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-brush: "Ma Shan Zheng", "Kaiti SC", "STKaiti", serif;

  --max: 72rem;
  --header-h: 4.25rem;
}

html[lang="en"] .zh { display: none !important; }
html[lang="zh"] .en { display: none !important; }
html[lang="zh"] .book-en-title { display: none; }
html[lang="en"] .book-zh-title { display: none; }
.cad { display: none; }
html[data-region="ca"] .usd { display: none; }
html[data-region="ca"] .cad { display: inline; }

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

:lang(zh) { font-family: var(--font-zh); }

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--seal); }

:focus-visible {
  outline: 2px solid var(--seal);
  outline-offset: 3px;
}

.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: -100px;
  background: var(--ink);
  color: var(--on-ink);
  padding: 0.6rem 1rem;
  z-index: 1000;
}
.skip-link:focus { top: 1rem; }

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

h1, h2, h3 {
  font-weight: 500;
  line-height: 1.2;
  margin: 0 0 1rem;
  text-wrap: balance;
}
h1 { font-size: clamp(2.25rem, 4.6vw, 3.75rem); letter-spacing: -0.015em; line-height: 1.1; }
h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); letter-spacing: -0.01em; }
h3 { font-size: 1.3125rem; }
p { margin: 0 0 1rem; }

.section-lead {
  color: var(--ink-soft);
  max-width: 34em;
  margin: 0;
}

.fine-print {
  font-size: 0.875rem;
  color: var(--muted);
  margin: 1rem 0 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.logo {
  font-size: 1.3125rem;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: -0.01em;
}
.logo:hover { color: var(--ink); }
.logo-zh {
  font-size: 1.0625rem;
  color: var(--muted);
  margin-left: 0.3rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1.75rem;
}
.site-nav a {
  font-size: 1rem;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 0.25rem 0;
}
.site-nav a:hover,
.site-nav a.is-current {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--seal);
  text-underline-offset: 0.45em;
}

.lang-toggle {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 2px;
}
.lang-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.875rem;
  line-height: 1;
  padding: 0.45rem 0.65rem;
  cursor: pointer;
}
.lang-btn.is-active {
  background: var(--ink);
  color: var(--on-ink);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
  padding: 0;
}
.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 1.5px;
  margin-inline: auto;
  background: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.4rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font: inherit;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.3;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}
.btn-primary { background: var(--ink); color: var(--on-ink); }
.btn-primary:hover { background: var(--seal); color: var(--on-ink); }
.btn-outline { border-color: var(--ink); color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: var(--on-ink); }
.btn-light { background: var(--on-ink); color: var(--ink); }
.btn-light:hover { background: var(--lavender); color: var(--ink); }
.btn-light-outline { border-color: var(--on-ink-soft); color: var(--on-ink); }
.btn-light-outline:hover { border-color: var(--on-ink); background: var(--on-ink); color: var(--ink); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; background: var(--ink); color: var(--on-ink); }

.link-quiet {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 0.3em;
}
.link-quiet:hover { text-decoration-color: var(--seal); color: var(--ink); }

.section { padding: 6rem 0; }
.section-header { margin-bottom: 3rem; }
.section-lavender { background: var(--lavender); }
.section-rule { border-top: 1px solid var(--line); padding: 4.5rem 0; }
.section-ink {
  background: var(--ink);
  color: var(--on-ink);
}
.section-ink .section-lead,
.section-ink .fine-print { color: var(--on-ink-soft); }
.section-ink a:not(.btn) { color: var(--on-ink); }

.hero { padding: 4rem 0 3rem; }
.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: start;
}
.hero-copy { max-width: 38rem; padding-top: 2.5rem; }
.hero-roles {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 1.5rem;
}
.hero h1 { margin-bottom: 1.5rem; }
.hero-lead {
  font-size: 1.3125rem;
  line-height: 1.6;
  color: var(--ink-soft);
  margin-bottom: 2.25rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.75rem;
  margin-bottom: 2.5rem;
}
.hero-prices {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2.5rem;
  margin: 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: 0.9375rem;
}
.hero-prices dt { color: var(--muted); }
.hero-prices dd { margin: 0; }

.hero-name {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  padding-right: 1rem;
}
.hero-name-text {
  font-family: var(--font-brush);
  writing-mode: vertical-rl;
  font-size: clamp(6rem, 11vw, 9.5rem);
  line-height: 1;
  color: var(--ink);
}
.seal {
  font-family: var(--font-brush);
  writing-mode: vertical-rl;
  display: grid;
  place-content: center;
  width: 4.25rem;
  height: 4.25rem;
  padding: 0.3rem;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--paper);
  background: var(--seal);
  border-radius: 3px;
  word-break: break-all;
  letter-spacing: 0;
  transform: rotate(-3deg);
  animation: stamp 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) 0.6s both;
}
@keyframes stamp {
  from { opacity: 0; transform: rotate(-3deg) scale(1.35); }
  to   { opacity: 1; transform: rotate(-3deg) scale(1); }
}

.topics {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink);
}
.topic {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 1rem 3rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line);
}
.topic h3 { margin: 0; }
.topic p { margin: 0; color: var(--ink-soft); max-width: 36em; }
.topic h3,
.lesson h3 {
  display: grid;
  grid-template-columns: 2.25rem 1fr;
  align-items: baseline;
}
.topic-emoji { font-size: 0.9em; }
.topics-cta { margin: 2.5rem 0 5rem; }

.lesson {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 1rem 3rem;
  padding: 2.5rem;
  background: var(--lavender);
}
.lesson h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.lesson-price { color: var(--ink-soft); margin: 0; }
.lesson-body p { color: var(--ink-soft); }
.lesson-motto {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 1rem;
  margin: 1.5rem 0 1.75rem;
}
.lesson-motto [lang="zh"] { font-size: 1.5rem; color: var(--ink); }
.lesson-motto .en { font-style: italic; }

.booking-layout {
  display: grid;
  gap: 3rem;
}
.booking-aside {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 4rem;
}
.booking-aside .booking-facts,
.booking-aside .fine-print { grid-column: 1 / -1; }
.cal { min-height: 30rem; }
.cal-fallback { margin: 0; color: var(--on-ink-soft); }
.cal:has(iframe) .cal-fallback { display: none; }

.session {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--on-ink-line);
}
.session h3 { margin: 0; }
.session-price { margin: 0; color: var(--on-ink-soft); grid-column: 1; }
.session .btn { grid-column: 2; grid-row: 1 / span 2; }

.booking-facts {
  margin: 1.5rem 0 0;
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 1rem;
  font-size: 1rem;
}
.booking-facts dt { color: var(--on-ink-soft); font-size: 0.875rem; }
.booking-facts dd { margin: 0; }

.book-layout {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 5rem;
  align-items: center;
}
.covers {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
}
.cover {
  grid-row: 1;
  box-shadow: 0 1px 2px rgba(45, 36, 64, 0.12), 0 18px 40px -12px rgba(45, 36, 64, 0.35);
}
.cover-en { grid-column: 1 / 8; z-index: 2; }
.cover-zh { grid-column: 4 / 11; margin-top: 18%; z-index: 1; }
html[lang="zh"] .cover-en { z-index: 1; }
html[lang="zh"] .cover-zh { z-index: 2; }

.book-copy h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
.book-author { color: var(--muted); font-size: 1rem; margin-bottom: 1.5rem; }
.book-copy > p { color: var(--ink-soft); max-width: 34em; }
.why-wrote {
  margin: 2rem 0;
  padding: 0 0 0 1.5rem;
  border-left: 2px solid var(--seal);
  font-style: italic;
  font-size: 1.1875rem;
  line-height: 1.65;
  max-width: 32em;
}
.why-wrote :lang(zh) { font-style: normal; }
.why-wrote p { margin: 0; }
.themes {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0;
  font-size: 0.9375rem;
  color: var(--muted);
}
.themes li:not(:last-child)::after {
  content: "/";
  margin: 0 0.6rem;
  color: var(--line);
}

.meet-layout {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
  gap: 5rem;
  align-items: center;
}
.portrait { margin: 0; }
.portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: 50% 12%;
}
.meet-intro {
  font-size: 1.5rem;
  line-height: 1.45;
  margin-bottom: 1.5rem;
}
.meet-copy p:not(.meet-intro) { color: var(--ink-soft); max-width: 34em; }
.meet-copy .btn { margin-top: 1rem; }

.videos-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 0.5rem 2rem;
}
.videos-header h2 { margin: 0; grid-column: 1; }
.videos-header .section-lead { grid-column: 1; }
.videos-header .link-quiet { grid-column: 2; grid-row: 1 / span 2; }
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.video { text-decoration: none; display: block; }
.video-thumb {
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  background: var(--lavender);
  margin-bottom: 0.75rem;
  overflow: hidden;
}
.video-thumb img,
.video-thumb::after { grid-area: 1 / 1; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; }
.video-thumb::after {
  content: "";
  filter: drop-shadow(0 0 0.4rem rgba(0, 0, 0, 0.5));
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0.8rem 0 0.8rem 1.35rem;
  border-color: transparent transparent transparent var(--paper);
  opacity: 0.85;
  margin-left: 0.3rem;
}
.video:hover .video-thumb::after { border-left-color: var(--seal); opacity: 1; }
.video-title { font-size: 1.0625rem; }
.videos-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin: 3rem 0 0;
  font-size: 1.3125rem;
}

.newsletter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 2rem 4rem;
  align-items: center;
}
.newsletter h2 { margin-bottom: 0.5rem; }
.newsletter-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.newsletter-form input {
  flex: 1 1 14rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  font: inherit;
  font-size: 1rem;
  background: #fff;
  color: var(--ink);
}
.newsletter-form .fine-print { flex-basis: 100%; margin-top: 0.25rem; }

.site-footer {
  background: var(--ink);
  color: var(--on-ink-soft);
  padding: 3rem 0;
  font-size: 0.9375rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem 3rem;
  align-items: end;
}
.footer-name { font-size: 1.3125rem; color: var(--on-ink); margin: 0 0 0.25rem; }
.footer-roles { margin: 0; }
.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: right;
}
.footer-links a { color: var(--on-ink); }
.footer-links a:hover { color: var(--lavender); }
.footer-copy {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--on-ink-line);
  font-size: 0.875rem;
}

@media (max-width: 960px) {
  .section { padding: 4.5rem 0; }
  .booking-aside,
  .booking-facts { grid-template-columns: 1fr; }
  .book-layout,
  .meet-layout { grid-template-columns: 1fr; gap: 3rem; }
  .covers { max-width: 26rem; }
  .portrait { max-width: 24rem; }
  .topic,
  .lesson { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr 1fr; }
  .newsletter { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 1.0625rem; }
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: var(--header-h);
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.25rem 1.5rem;
    gap: 1rem;
  }
  .site-nav.is-open { display: flex; }
  .site-nav ul { flex-direction: column; gap: 0; }
  .site-nav a { display: block; padding: 0.6rem 0; }

  .hero { padding: 2.5rem 0 4rem; }
  .hero-inner { grid-template-columns: 1fr; gap: 0; }
  .hero-copy { padding-top: 0; }
  .hero-name {
    order: -1;
    flex-direction: row;
    align-items: center;
    padding: 0;
    margin-bottom: 2rem;
  }
  .hero-name-text { writing-mode: horizontal-tb; font-size: 3.5rem; }
  .seal { width: 3rem; height: 3rem; font-size: 1.1rem; }
  .hero-lead { font-size: 1.1875rem; }

  .lesson { padding: 1.75rem 1.25rem; }
  .session { grid-template-columns: 1fr; gap: 0.25rem; }
  .session .btn { grid-column: 1; grid-row: auto; margin-top: 0.75rem; justify-self: start; }
  .video-grid { grid-template-columns: 1fr; }
  .videos-header { grid-template-columns: 1fr; }
  .videos-header .link-quiet { grid-column: 1; grid-row: auto; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .seal { animation: none; }
}