/* YKui · Agent-driven SaaS — shared styles
   Dark teal / warm gray · bilingual simultaneous display */

:root {
  --teal-900: #0c2a2e;
  --teal-800: #143a40;
  --teal-700: #1a4d54;
  --teal-600: #2a6b74;
  --teal-500: #3d8a94;
  --teal-100: #d4e8eb;
  --warm-50: #f7f5f2;
  --warm-100: #efebe6;
  --warm-200: #e0d9d0;
  --warm-400: #a89f94;
  --warm-600: #6b635a;
  --warm-800: #3d3832;
  --warm-900: #2a2622;
  /* Soft charcoal with a teal cast: between --warm-800 and teal. Body/heading ink on cream. */
  --ink: #3e4a46;
  --cream: #faf8f5;
  --accent: #c4a574;
  --accent-soft: #e8d9c0;
  --danger-soft: #f0e6e0;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 2px 12px rgba(12, 42, 46, 0.08);
  --shadow-lg: 0 8px 28px rgba(12, 42, 46, 0.12);
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans SC", system-ui, sans-serif;
  --max: 1080px;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--cream);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--teal-600);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--teal-800);
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--teal-500);
  outline-offset: 2px;
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--teal-900);
  color: var(--warm-50);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.25rem;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.logo:hover {
  color: var(--accent-soft);
}

.logo-mark {
  font-weight: 650;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.logo-sub {
  font-size: 0.7rem;
  color: var(--warm-400);
  letter-spacing: 0.04em;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--cream);
  border-radius: 6px;
  padding: 0.4rem 0.65rem;
  font-size: 0.85rem;
  cursor: pointer;
  font-family: inherit;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.15rem 0.1rem;
}

.site-nav a {
  color: var(--warm-200);
  text-decoration: none;
  font-size: 0.8rem;
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}

.site-nav a:hover {
  color: var(--cream);
  background: rgba(255, 255, 255, 0.08);
}

.site-nav a[aria-current="page"] {
  color: var(--accent-soft);
  background: rgba(196, 165, 116, 0.12);
}

.site-nav .nav-members {
  margin-left: 0.35rem;
  border: 1px solid rgba(196, 165, 116, 0.4);
  color: var(--accent-soft);
}

.site-nav .nav-privacy {
  color: var(--warm-400);
  font-size: 0.75rem;
}

/* —— Main —— */
main {
  flex: 1;
  width: 100%;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3.5rem;
}

/* —— Bilingual helpers —— */
.bi {
  display: block;
}

.bi-zh {
  display: block;
  font-weight: 550;
  color: var(--ink);
}

/* Dark surfaces keep light type. .bi-zh must not paint near-black ink over teal/cream. */
.hero .bi-zh,
.page-hero .bi-zh,
.cta-box .bi-zh,
.site-footer .bi-zh {
  color: inherit;
}

.bi-en {
  display: block;
  font-size: 0.92em;
  color: var(--warm-600);
  font-weight: 400;
  margin-top: 0.15rem;
}

.bi-inline {
  font-weight: inherit;
}

.bi-inline .sep {
  color: var(--warm-400);
  margin: 0 0.35em;
  font-weight: 400;
}

.eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal-600);
  margin: 0 0 0.75rem;
}

/* —— Hero —— */
.hero {
  background: linear-gradient(145deg, var(--teal-900) 0%, var(--teal-700) 55%, #24555c 100%);
  color: var(--cream);
  padding: 3.25rem 1.25rem 3.5rem;
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.6rem, 3.5vw, 2.15rem);
  font-weight: 650;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.hero h1 .bi-en {
  color: var(--warm-200);
  font-weight: 400;
  font-size: 0.85em;
  margin-top: 0.35rem;
}

.hero-lead {
  max-width: 40rem;
  margin: 0 0 1.75rem;
  color: var(--teal-100);
  font-size: 1.02rem;
}

.hero-lead .bi-en {
  color: rgba(212, 232, 235, 0.85);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1.2rem;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 550;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn-primary {
  background: var(--accent);
  color: var(--teal-900);
}

.btn-primary:hover {
  background: var(--accent-soft);
  color: var(--teal-900);
}

.btn-ghost {
  background: transparent;
  color: var(--cream);
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--cream);
}

.btn-outline {
  background: transparent;
  color: var(--teal-700);
  border-color: var(--teal-600);
}

.btn-outline:hover {
  background: var(--teal-100);
  color: var(--teal-900);
}

/* —— Sections —— */
.section-title {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  font-weight: 650;
  color: var(--teal-900);
}

.section-lead {
  margin: 0 0 1.75rem;
  max-width: 38rem;
  color: var(--warm-600);
}

.section-lead .bi-en {
  color: var(--warm-400);
}

/* —— Alpha cards: two rows of three. Hide row 2 with body.alphas-health-only. —— */
.alpha-rows {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.alpha-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

body.alphas-health-only .alpha-row--more {
  display: none;
}

.alpha-card {
  background: #fff;
  border: 1px solid var(--warm-200);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.4rem 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.alpha-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--teal-500);
  transform: translateY(-2px);
  color: inherit;
}

.alpha-card .tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal-600);
  font-weight: 600;
}

.alpha-card h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--teal-900);
  line-height: 1.4;
}

.alpha-card h3 .bi-en {
  font-size: 0.88em;
  color: var(--warm-600);
}

.alpha-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--warm-600);
  flex: 1;
}

.alpha-card .card-cta {
  font-size: 0.85rem;
  color: var(--teal-600);
  font-weight: 550;
  margin-top: 0.25rem;
}

.alpha-card:hover .card-cta {
  color: var(--teal-800);
}

/* —— Page hero (inner pages) —— */
.page-hero {
  background: var(--teal-800);
  color: var(--cream);
  padding: 2.25rem 1.25rem 2.5rem;
}

.page-hero-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.page-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 650;
  line-height: 1.35;
}

.page-hero h1 .bi-en {
  color: var(--warm-200);
  font-weight: 400;
  font-size: 0.88em;
  margin-top: 0.3rem;
}

.page-hero .lead {
  max-width: 40rem;
  margin: 0;
  color: var(--teal-100);
}

.page-hero .lead .bi-en {
  color: rgba(212, 232, 235, 0.8);
}

/* —— Content blocks —— */
.content-block {
  background: #fff;
  border: 1px solid var(--warm-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.6rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
}

.content-block h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  color: var(--teal-900);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding: 0.85rem 0 0.85rem 3rem;
  border-bottom: 1px solid var(--warm-100);
  counter-increment: step;
}

.steps li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.steps li:first-child {
  padding-top: 0;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 50%;
  background: var(--teal-100);
  color: var(--teal-800);
  font-size: 0.85rem;
  font-weight: 650;
  display: flex;
  align-items: center;
  justify-content: center;
}

.steps li:first-child::before {
  top: 0;
}

.not-here {
  list-style: none;
  margin: 0;
  padding: 0;
}

.not-here li {
  padding: 0.55rem 0 0.55rem 1.4rem;
  position: relative;
  border-bottom: 1px solid var(--warm-100);
  color: var(--warm-600);
  font-size: 0.95rem;
}

.not-here li:last-child {
  border-bottom: none;
}

.not-here li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--warm-400);
}

.cta-box {
  background: linear-gradient(135deg, var(--teal-900), var(--teal-700));
  color: var(--cream);
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.75rem;
  margin-top: 1.5rem;
}

.cta-box h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--cream);
}

.cta-box p {
  margin: 0 0 1.1rem;
  color: var(--teal-100);
}

.cta-box .bi-en {
  color: rgba(212, 232, 235, 0.85);
}

.cta-box a.btn-primary {
  margin-right: 0.5rem;
  margin-bottom: 0.4rem;
}

.cta-box a.btn-ghost {
  margin-bottom: 0.4rem;
}

/* —— Badges / notes —— */
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 550;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--teal-900);
  margin-bottom: 1rem;
}

.badge-pending {
  background: var(--danger-soft);
  color: var(--warm-800);
}

.note-box {
  background: var(--warm-100);
  border-left: 3px solid var(--teal-500);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.15rem;
  margin: 1.25rem 0;
  font-size: 0.92rem;
  color: var(--warm-800);
}

.note-box .bi-en {
  color: var(--warm-600);
}

.related-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

/* —— Members form (non-functional) —— */
.login-skeleton {
  max-width: 380px;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 550;
  margin-bottom: 0.35rem;
  color: var(--warm-800);
}

.form-group input {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--warm-200);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--cream);
  color: var(--ink);
}

.form-group input:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.form-hint {
  font-size: 0.8rem;
  color: var(--warm-400);
  margin-top: 0.35rem;
}

.btn-disabled {
  background: var(--warm-200);
  color: var(--warm-600);
  cursor: not-allowed;
  border: none;
  pointer-events: none;
}

/* —— Legal pages —— */
.legal h2 {
  margin: 1.75rem 0 0.65rem;
  font-size: 1.1rem;
  color: var(--teal-900);
}

.legal h2:first-child {
  margin-top: 0;
}

.legal p,
.legal li {
  color: var(--warm-800);
  font-size: 0.95rem;
}

.legal ul {
  padding-left: 1.25rem;
}

.legal li {
  margin-bottom: 0.4rem;
}

/* —— Home members note —— */
.members-teaser {
  margin-top: 2.5rem;
  padding: 1.5rem 1.6rem;
  background: #fff;
  border: 1px dashed var(--warm-400);
  border-radius: var(--radius-lg);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.members-teaser h2 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  color: var(--teal-900);
}

.members-teaser p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--warm-600);
  max-width: 32rem;
}

/* —— Footer —— */
.site-footer {
  background: var(--warm-900);
  color: var(--warm-200);
  padding: 1.75rem 1.25rem;
  font-size: 0.85rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-copy {
  max-width: 36rem;
  margin: 0;
  line-height: 1.55;
}

.footer-copy .bi-en {
  color: var(--warm-400);
  font-size: 0.92em;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.footer-links a {
  color: var(--warm-200);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--accent-soft);
}

.footer-meta {
  width: 100%;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--warm-400);
  font-size: 0.78rem;
}

/* —— Responsive —— */
@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--teal-800);
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1rem 1rem;
    gap: 0.15rem;
    box-shadow: var(--shadow-lg);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.65rem 0.75rem;
    font-size: 0.9rem;
  }

  .site-nav .nav-members {
    margin-left: 0;
    margin-top: 0.35rem;
    text-align: center;
  }

  .alpha-row {
    grid-template-columns: 1fr;
  }

  .header-inner {
    position: relative;
  }
}

@media (max-width: 520px) {
  .wrap {
    padding: 1.75rem 1rem 2.5rem;
  }

  .hero {
    padding: 2.25rem 1rem 2.5rem;
  }

  .content-block {
    padding: 1.2rem 1.15rem;
  }
}