/* ==========================================================================
   Dharma Site Module — Intro / marketing pages
   Version: 1.1.0
   Requires: dharma-design-system.css (shared tokens) + Bootstrap 5 navbar
   Pair with: *-form.html using dharma-design-system.css
   ========================================================================== */

html.ds-intro-html {
  scroll-behavior: smooth;
}

body.ds-intro-body {
  margin: 0;
  font-family: var(--ds-intro-font-family);
  color: var(--ds-primary-strong);
  background: var(--ds-bg);
  letter-spacing: 0.04em;
}

/* ----- Intro banner (height + nav = form banner height) ----- */
.ds-intro-banner {
  position: relative;
  width: 100%;
  height: var(--ds-intro-banner-h);
  background: var(--ds-banner-bg);
  overflow: hidden;
}

.ds-intro-banner__photo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

.ds-intro-banner__placeholder {
  display: none;
  position: absolute;
  inset: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.92);
}

.ds-intro-banner--fallback {
  height: var(--ds-intro-banner-h);
  background: linear-gradient(
    120deg,
    rgba(58, 42, 20, 0.98) 0%,
    rgba(94, 69, 54, 0.95) 45%,
    rgba(135, 93, 37, 0.88) 100%
  );
}

.ds-intro-banner--fallback .ds-intro-banner__placeholder {
  display: flex;
}

.ds-intro-banner__temple {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  letter-spacing: 0.35em;
  opacity: 0.88;
}

.ds-intro-banner__title {
  margin: 0;
  max-width: 28rem;
  font-family: var(--ds-intro-font-family);
  font-size: clamp(1.25rem, 3.5vw, 1.85rem);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.08em;
}

/* ----- Sticky nav (Bootstrap .navbar base) ----- */
.ds-intro-nav {
  background: var(--ds-gold-nav);
  border-bottom: 3px solid var(--ds-primary);
  min-height: var(--ds-intro-nav-h);
  font-family:
    system-ui,
    -apple-system,
    "PingFang SC",
    "Microsoft YaHei",
    sans-serif;
}

.ds-intro-nav.sticky-top {
  z-index: var(--ds-z-sticky-nav);
  box-shadow: 0 2px 12px rgba(94, 69, 54, 0.06);
}

.ds-intro-nav .navbar-nav {
  gap: 0.55rem;
}

.ds-intro-nav .nav-link {
  color: var(--ds-primary-strong);
  font-size: 1.2rem;
  font-weight: 600;
  padding: 0.95rem 1.1rem;
  border-radius: 0;
  position: relative;
  letter-spacing: 0.02em;
}

.ds-intro-nav .nav-link:hover {
  background: var(--ds-accent-soft);
  color: var(--ds-primary);
}

.ds-intro-nav .nav-link:focus-visible {
  outline: 2px solid var(--ds-primary);
  outline-offset: -2px;
}

.ds-intro-nav .nav-link.active {
  color: var(--ds-primary);
  background: transparent;
}

.ds-intro-nav .navbar-toggler {
  border-color: var(--ds-border-subtle);
}

.ds-intro-nav .navbar-toggler:focus-visible {
  outline: 2px solid var(--ds-primary);
  outline-offset: 2px;
  box-shadow: none;
}

@media (min-width: 992px) {
  .ds-intro-nav .navbar-collapse {
    align-self: stretch;
  }

  .ds-intro-nav .navbar-nav {
    align-items: stretch;
    gap: 0.45rem;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    margin-bottom: 0 !important;
  }

  .ds-intro-nav .nav-item {
    display: flex;
  }

  .ds-intro-nav .nav-link {
    display: inline-flex;
    align-items: center;
    padding-top: 0;
    padding-bottom: 0;
    padding-left: 1.15rem;
    padding-right: 1.15rem;
    min-height: calc(var(--ds-intro-nav-h) - 3px);
  }

  .ds-intro-nav .nav-link.active::after {
    content: "";
    position: absolute;
    left: 0.85rem;
    right: 0.85rem;
    bottom: -3px;
    height: 3px;
    background: var(--ds-primary);
  }
}

@media (max-width: 991.98px) {
  :root {
    --ds-intro-nav-h: var(--ds-nav-h-mobile);
  }

  .ds-intro-nav {
    min-height: var(--ds-nav-h-mobile);
  }

  .ds-intro-nav .navbar-nav {
    gap: 0.35rem;
  }

  .ds-intro-nav .nav-link {
    font-size: 1.05rem;
    padding: 0.72rem 0.9rem;
  }

  .ds-intro-nav .nav-link.active::after {
    content: "";
    position: absolute;
    left: 0.5rem;
    right: auto;
    width: 3px;
    top: 0.35rem;
    bottom: 0.35rem;
    height: auto;
    background: var(--ds-primary);
    border-radius: 2px;
  }

  .ds-intro-nav .navbar-toggler {
    padding: 0.35rem 0.55rem;
  }
}

/* ----- Main & sections ----- */
.ds-intro-main {
  padding: 0 0 2.5rem;
}

.ds-intro-section {
  scroll-margin-top: calc(var(--ds-intro-nav-h) + 2.5rem);
  padding-top: calc(var(--ds-intro-section-gap) / 2);
  padding-bottom: calc(var(--ds-intro-section-gap) / 2);
}

.ds-intro-title {
  padding: 0 0 var(--ds-intro-title-gap);
  margin-bottom: 0;
  text-align: left;
}

.ds-intro-title .ds-intro-title__text {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: clamp(0.75rem, 2.2vw, 1.15rem);
  width: 100%;
  margin: 0;
  font-family: var(--ds-intro-font-family);
  font-size: clamp(1.55rem, 3.8vw, 2.1rem);
  font-weight: 800;
  line-height: 1.28;
  color: var(--ds-primary);
  letter-spacing: 0.12em;
}

.ds-intro-title .ds-intro-title__text::before {
  content: "";
  flex: 0 0 2.5rem;
  width: 2.5rem;
  height: 3px;
  background: var(--ds-gold);
  opacity: 0.95;
}

.ds-intro-title .ds-intro-title__text::after {
  content: "";
  flex: 1 1 auto;
  min-width: 2rem;
  height: 1px;
  background: var(--ds-gold);
  opacity: 0.75;
}

.ds-intro-title--center {
  text-align: center;
  max-width: var(--ds-intro-page-max);
  margin-inline: auto;
  width: 100%;
}

.ds-intro-title--center .ds-intro-title__text {
  justify-content: center;
  gap: clamp(0.85rem, 3vw, 1.55rem);
}

.ds-intro-title--center .ds-intro-title__text::before,
.ds-intro-title--center .ds-intro-title__text::after {
  flex: 1 1 0;
  min-width: 1rem;
  max-width: var(--ds-intro-title-line-max);
  width: auto;
  height: 1px;
  opacity: 0.9;
}

@media (max-width: 575.98px) {
  .ds-intro-title--center .ds-intro-title__text::before,
  .ds-intro-title--center .ds-intro-title__text::after {
    max-width: 2.5rem;
  }
}

.ds-intro-prose {
  display: flex;
  flex-direction: column;
  gap: var(--ds-intro-block-gap);
  max-width: var(--ds-intro-page-max);
  margin-inline: auto;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--ds-primary-strong);
  text-align: left;
}

.ds-intro-prose > * {
  margin-top: 0;
  margin-bottom: 0;
}

.ds-intro-prose h3.ds-intro-subtitle {
  font-family: var(--ds-intro-font-family);
  font-size: 1.34rem;
  font-weight: 700;
  color: var(--ds-primary);
  letter-spacing: 0.06em;
  line-height: 1.45;
}

.ds-intro-prose ul {
  list-style-position: outside;
  padding-left: 1.35rem;
}

.ds-intro-prose li + li {
  margin-top: 0.35rem;
}

.ds-intro-prose li::marker {
  color: var(--ds-gold);
}

.ds-intro-prose--center {
  text-align: center;
  align-items: center;
}

.ds-intro-lead {
  font-size: 1.12rem;
  line-height: 1.95;
  color: var(--ds-text-warm);
  text-align: center;
  width: 100%;
}

/* ----- CTA ----- */
.ds-intro-cta {
  text-align: center;
  width: 100%;
}

.ds-intro-cta__group {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.65rem 0.9rem;
}

.ds-intro-cta .btn {
  padding: 0.8rem 1.75rem;
  font-size: 1.1rem;
}

/* ----- Info panel ----- */
.ds-intro-info {
  border: 1px solid rgba(201, 168, 76, 0.42);
  background: color-mix(in srgb, var(--ds-surface-cream) 92%, transparent);
  border-radius: var(--ds-radius-sm);
  padding: 1.5rem 1.75rem;
}

.ds-intro-info__list {
  margin: 0;
}

.ds-intro-info__row {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 0.5rem 1.25rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--ds-border-subtle);
}

.ds-intro-info__row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.ds-intro-info__row dt {
  font-weight: 700;
  color: var(--ds-primary);
  margin: 0;
}

.ds-intro-info__row dd {
  margin: 0;
  line-height: 1.75;
}

.ds-intro-info__row a {
  color: var(--ds-primary);
}

/* ----- Data table (merit / schedule) ----- */
.ds-intro-table {
  font-size: 1rem;
  text-align: center;
  width: 100%;
}

.ds-intro-table th,
.ds-intro-table td {
  text-align: center;
  vertical-align: middle;
}

.ds-intro-table thead th {
  background: var(--ds-accent-soft);
  color: var(--ds-primary-strong);
  font-weight: 600;
}

.ds-intro-table tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--ds-bg) 80%, white);
}

.ds-intro-table tbody th[scope="row"] {
  font-weight: 700;
  color: var(--ds-primary);
  background: color-mix(in srgb, var(--ds-bg) 92%, white);
  white-space: nowrap;
}

.ds-intro-table--merit tbody td:nth-child(2) {
  text-align: left;
  line-height: 1.75;
}

/* ----- Back to top ----- */
.ds-intro-back-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: var(--ds-z-back-top);
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid var(--ds-border-subtle);
  background: var(--ds-surface-cream);
  color: var(--ds-text-warm);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.ds-intro-back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.ds-intro-back-top:hover {
  color: var(--ds-primary);
  border-color: var(--ds-primary);
}

.ds-intro-back-top:focus-visible {
  outline: 2px solid var(--ds-primary);
  outline-offset: 2px;
}

/* Bootstrap button tokens on intro pages */
body.ds-intro-body .btn-primary {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--ds-btn-primary-bg);
  --bs-btn-border-color: var(--ds-btn-primary-bg);
  --bs-btn-hover-bg: var(--ds-btn-primary-bg-hover);
  --bs-btn-hover-border-color: var(--ds-btn-primary-bg-hover);
  --bs-btn-active-bg: var(--ds-btn-primary-bg-active);
  --bs-btn-active-border-color: var(--ds-btn-primary-bg-active);
}

body.ds-intro-body .btn-outline-secondary {
  --bs-btn-color: var(--ds-primary-strong);
  --bs-btn-border-color: var(--ds-border-subtle);
  --bs-btn-hover-bg: var(--ds-accent-soft);
  --bs-btn-hover-border-color: var(--ds-gold);
  --bs-btn-hover-color: var(--ds-primary);
}

body.ds-intro-body .btn:focus-visible {
  outline: 2px solid var(--ds-primary);
  outline-offset: 2px;
  box-shadow: none;
}

@media (max-width: 575.98px) {
  .ds-intro-info__row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .ds-intro-prose h3.ds-intro-subtitle {
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html.ds-intro-html {
    scroll-behavior: auto;
  }

  .ds-intro-back-top {
    transition: none;
  }
}