/* ========================================
   東渡寺 Dongdu Temple — Zen Aesthetic
   海を越える心 / 跨越沧海之心
   ======================================== */

/* ---- Reset & Base ---- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors — ink wash palette */
  --paper:        #f7f3ea;
  --paper-warm:   #ede6d7;
  --ink:          #1a1714;
  --ink-soft:     #3a3530;
  --charcoal:     #5a5550;
  --gold:         #b8963e;
  --gold-light:   #d4b860;
  --vermillion:   #b54331;
  --vermillion-dark: #8b2f20;
  --cream:        #fefcf6;
  --border:       rgba(0,0,0,0.08);
  --shadow:       0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg:    0 12px 48px rgba(0,0,0,0.10);

  /* Typography */
  --font-sans-zh: 'Noto Sans SC', 'Hiragino Sans GB', sans-serif;
  --font-sans-jp: 'Noto Sans JP', 'Hiragino Sans', sans-serif;
  --font-serif-zh: 'Noto Serif SC', 'SimSun', serif;
  --font-serif-jp: 'Noto Serif JP', 'YuMincho', serif;

  /* Spacing */
  --nav-height: 64px;
  --section-pad: clamp(60px, 10vw, 120px);
  --content-max: 1100px;
  --content-narrow: 760px;

  /* Transitions */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 0.5s;
}

html {
  scroll-behavior: smooth;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-serif-zh);
  background: var(--cream);
  color: var(--ink);
  line-height: 1.9;
  overflow-x: hidden;
}

/* When Japanese is active, switch to JP fonts */
body.lang-jp {
  font-family: var(--font-serif-jp);
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background var(--dur) var(--ease-smooth),
              box-shadow var(--dur) var(--ease-smooth);
}

.nav.scrolled {
  background: rgba(254, 252, 246, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--border);
}

.nav-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 32px;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-serif-zh);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.1em;
  transition: color var(--dur) var(--ease-smooth);
}

.nav-logo:hover {
  color: var(--vermillion);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-family: var(--font-sans-zh);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--charcoal);
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  position: relative;
  padding: 4px 0;
  transition: color var(--dur) var(--ease-smooth);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--vermillion);
  transition: width var(--dur) var(--ease-smooth);
}

.nav-links a:hover {
  color: var(--vermillion);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Language Toggle */
.lang-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 14px;
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--charcoal);
  transition: all var(--dur) var(--ease-smooth);
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-toggle:hover {
  border-color: var(--vermillion);
  color: var(--vermillion);
}

.lang-divider {
  color: var(--border);
  font-weight: 300;
}

.lang-zh, .lang-jp {
  transition: all var(--dur) var(--ease-smooth);
  opacity: 0.5;
}

.lang-toggle.zh-active .lang-zh,
.lang-toggle.jp-active .lang-jp {
  opacity: 1;
  color: var(--vermillion);
}

/* ---- Hero ---- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(184, 150, 62, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(181, 67, 49, 0.04) 0%, transparent 60%),
    var(--cream);
  overflow: hidden;
}

/* Decorative ink-brush circles */
.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -15%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.04);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.03);
  pointer-events: none;
}

.hero-overlay {
  display: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 24px;
}

.hero-subtitle {
  font-family: var(--font-sans-zh);
  font-size: 0.8rem;
  font-weight: 300;
  letter-spacing: 0.3em;
  color: var(--charcoal);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.hero-title {
  font-family: var(--font-serif-zh);
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 12px;
}

.hero-tagline {
  font-family: var(--font-serif-jp);
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  font-weight: 300;
  color: var(--gold);
  letter-spacing: 0.2em;
  margin-bottom: 32px;
}

.hero-desc {
  font-family: var(--font-sans-zh);
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--charcoal);
  line-height: 2;
  letter-spacing: 0.04em;
  max-width: 480px;
  margin: 0 auto;
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.hero-scroll span {
  font-family: var(--font-sans-zh);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--charcoal);
  opacity: 0.5;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--charcoal), transparent);
  opacity: 0.3;
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 0.6; }
}

/* ---- Sections ---- */
.section {
  padding: var(--section-pad) 0;
}

.section-dark {
  background: var(--ink);
  color: var(--paper);
}

.section-dark .section-label {
  color: var(--gold);
}

.section-dark h2 {
  color: var(--cream);
}

.section-dark .lead {
  color: var(--paper-warm);
}

.section-dark p {
  color: rgba(237, 230, 215, 0.75);
}

.section-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 32px;
}

.section-header {
  margin-bottom: 64px;
}

.section-label {
  font-family: var(--font-sans-zh);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-header h2 {
  font-family: var(--font-serif-jp);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
}

/* ---- Content Grid (About) ---- */
.content-grid {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 64px;
  align-items: start;
}

.content-text .lead {
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--ink-soft);
  margin-bottom: 24px;
  line-height: 2.1;
}

.content-text p {
  color: var(--charcoal);
}

/* Callout box */
.content-callout {
  background: var(--ink);
  color: var(--cream);
  padding: 40px 32px;
  border-radius: 2px;
  text-align: center;
}

.callout-number {
  font-family: var(--font-serif-jp);
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
  color: var(--gold-light);
  margin-bottom: 8px;
}

.callout-number span {
  font-size: 1rem;
  font-weight: 400;
}

.callout-text {
  font-family: var(--font-sans-zh);
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.06em;
  opacity: 0.8;
}

/* ---- Story Timeline ---- */
.story-timeline {
  position: relative;
  padding-left: 0;
}

.story-timeline::before {
  content: '';
  position: absolute;
  left: 60px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255,255,255,0.12);
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 40px;
  padding: 40px 0;
  position: relative;
}

.timeline-item:first-child {
  padding-top: 0;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 60px;
  top: 48px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  transform: translateX(-4px);
}

.timeline-item:first-child::before {
  top: 8px;
}

.timeline-item:last-child::after {
  content: '';
  position: absolute;
  left: 60px;
  bottom: 0;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--vermillion);
  transform: translateX(-7px);
}

.timeline-year {
  font-family: var(--font-serif-jp);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--gold-light);
  letter-spacing: 0.05em;
  text-align: right;
  padding-top: 4px;
}

.timeline-year span {
  font-size: 0.9rem;
  font-weight: 400;
}

.timeline-year.highlight {
  color: var(--vermillion);
  font-size: 2.2rem;
}

.timeline-content h3 {
  font-family: var(--font-serif-jp);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cream);
  margin-bottom: 8px;
  letter-spacing: 0.06em;
}

.timeline-content p {
  font-family: var(--font-sans-zh);
  font-size: 0.9rem;
  line-height: 1.9;
  color: rgba(237, 230, 215, 0.7);
}

/* ---- Spirit Cards ---- */
.spirit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.spirit-card {
  background: var(--cream);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 48px 32px;
  transition: transform var(--dur) var(--ease-smooth),
              box-shadow var(--dur) var(--ease-smooth);
}

.spirit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.spirit-icon {
  font-size: 2rem;
  margin-bottom: 20px;
}

.spirit-card h3 {
  font-family: var(--font-serif-jp);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}

.spirit-card p {
  font-family: var(--font-sans-zh);
  font-size: 0.85rem;
  color: var(--charcoal);
  line-height: 1.8;
}

/* ---- Visit ---- */
.visit-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items:center;
}

.visit-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.visit-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.visit-item strong {
  font-family: var(--font-sans-zh);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.visit-item span {
  font-family: var(--font-sans-zh);
  font-size: 0.95rem;
  color: rgba(237, 230, 215, 0.8);
  line-height: 1.8;
}

.visit-quote blockquote {
  border-left: 2px solid var(--gold);
  padding: 8px 0 8px 32px;
}

.visit-quote blockquote p {
  font-family: var(--font-serif-jp);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 2.2;
  color: var(--cream);
  letter-spacing:0.08em;
  margin-bottom: 12px;
}

.visit-quote blockquote cite {
  font-family: var(--font-sans-zh);
  font-size: 0.75rem;
  font-style: normal;
  color: rgba(237, 230, 215, 0.5);
}

/* ---- Footer ---- */
.footer {
  background: var(--ink);
  padding: 64px 0 48px;
  text-align: center;
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 32px;
}

.footer-brand {
  font-family: var(--font-serif-jp);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gold-light);
  letter-spacing: 0.15em;
  margin-bottom: 8px;
}

.footer-tagline {
  font-family: var(--font-serif-jp);
  font-size: 0.8rem;
  color: rgba(237, 230, 215, 0.5);
  letter-spacing: 0.08em;
  margin-bottom: 24px;
}

.footer-copy {
  font-family: var(--font-sans-zh);
  font-size: 0.7rem;
  color: rgba(237, 230, 215, 0.35);
  letter-spacing: 0.06em;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .content-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .content-callout {
    order: -1;
    padding: 32px 24px;
  }

  .story-timeline::before {
    left: 40px;
  }

  .timeline-item {
    grid-template-columns: 80px 1fr;
    gap: 24px;
  }

  .timeline-item::before,
  .timeline-item::after {
    left: 40px !important;
  }

  .timeline-year {
    font-size: 1.2rem;
    text-align: left;
    padding-left: 0;
  }

  .spirit-grid {
    grid-template-columns: 1fr;
  }

  .visit-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ---- Fade-in animation on scroll ---- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-smooth),
              transform 0.8s var(--ease-smooth);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}