/* 溪水邊 Stream Side — Global Styles */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700&display=swap');

:root {
  --oak:    #8C6A5D;
  --straw:  #D4A373;
  --rice:   #FAF3E0;
  --sprout: #E9EDC9;
  --bark:   #433430;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-family: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', sans-serif;
  background-color: var(--rice);
  color: var(--bark);
  line-height: 1.8;
  scroll-behavior: smooth;
}

/* ── Grain texture overlay ── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

/* ── Typography ── */
h1, h2, h3, h4 {
  color: var(--oak);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

p { line-height: 1.8; }

a { color: inherit; text-decoration: none; }

/* ── Nav ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 243, 224, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(140, 106, 93, 0.12);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--oak);
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo span { color: var(--straw); }

.nav-links {
  display: none;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--oak);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--straw);
  transition: width 0.25s;
}

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

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

@media (min-width: 1024px) {
  .nav-links { display: flex; }
  .hamburger { display: none !important; }
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--oak);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none;
  flex-direction: column;
  background: rgba(250, 243, 224, 0.97);
  backdrop-filter: blur(12px);
  padding: 1rem 1.5rem 1.5rem;
  gap: 0.5rem;
  border-bottom: 1px solid rgba(140, 106, 93, 0.12);
}

.mobile-menu.open { display: flex; }

.mobile-menu a {
  color: var(--oak);
  font-size: 1rem;
  font-weight: 500;
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(140, 106, 93, 0.1);
  letter-spacing: 0.04em;
  transition: color 0.2s;
}

.mobile-menu a:hover { color: var(--straw); }

/* ── Hero Banner ── */
.hero-banner {
  position: relative;
  height: min(80vh, 600px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, #c9b7a8 0%, #d4a373 50%, #8c6a5d 100%);
}

.hero-image-placeholder {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, rgba(67,52,48,0.3) 0%, rgba(67,52,48,0.5) 100%),
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 40px,
      rgba(255,255,255,0.02) 40px,
      rgba(255,255,255,0.02) 80px
    );
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image-placeholder::before {
  content: '🌾 主視覺圖片佔位符 Image Placeholder';
  color: rgba(250,243,224,0.35);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
}

.hero-text {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--rice);
  padding: 0 1.5rem;
}

.hero-text h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--rice);
  letter-spacing: 0.12em;
  text-shadow: 0 2px 20px rgba(67,52,48,0.4);
  margin-bottom: 1rem;
}

.hero-text p {
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  color: rgba(250,243,224,0.88);
  letter-spacing: 0.06em;
}

/* ── Content sections ── */
.section-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-container.narrow { max-width: 800px; }

.section-title {
  font-size: 1.6rem;
  color: var(--oak);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  color: var(--straw);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  margin-bottom: 3rem;
}

/* ── Cards ── */
.card {
  background: white;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 2px 16px rgba(140,106,93,0.08);
  transition: transform 0.25s, box-shadow 0.25s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(140,106,93,0.16);
}

/* ── Tag pills ── */
.tag {
  display: inline-block;
  background: var(--sprout);
  color: var(--bark);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.7rem;
  border-radius: 9999px;
  letter-spacing: 0.03em;
}

.tag-btn {
  display: inline-block;
  background: var(--sprout);
  color: var(--bark);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  border: none;
}

.tag-btn:hover,
.tag-btn.active {
  background: var(--oak);
  color: var(--rice);
}

/* ── Buttons ── */
.btn-primary {
  display: inline-block;
  background: var(--straw);
  color: var(--bark);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.75rem 2rem;
  border-radius: 9999px;
  letter-spacing: 0.06em;
  transition: background 0.2s, transform 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--oak);
  color: var(--rice);
  transform: translateY(-1px);
}

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--oak);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.8rem;
  border-radius: 9999px;
  border: 2px solid var(--oak);
  letter-spacing: 0.05em;
  transition: all 0.2s;
  cursor: pointer;
}

.btn-outline:hover {
  background: var(--oak);
  color: var(--rice);
}

/* ── Image placeholder box ── */
.img-placeholder {
  background: linear-gradient(135deg, var(--sprout) 0%, var(--straw) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(67,52,48,0.45);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-align: center;
  border-radius: 1rem;
}

/* ── Footer ── */
.site-footer {
  background: var(--oak);
  color: var(--rice);
  padding: 4rem 1.5rem 2rem;
  margin-top: 6rem;
}

.footer-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

.footer-brand h3 {
  color: var(--rice);
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.footer-brand p {
  color: rgba(250,243,224,0.7);
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-nav h4 {
  color: var(--straw);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.footer-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-nav a {
  color: rgba(250,243,224,0.7);
  font-size: 0.88rem;
  transition: color 0.2s;
}

.footer-nav a:hover { color: var(--rice); }

.footer-bottom {
  border-top: 1px solid rgba(250,243,224,0.15);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
  text-align: center;
}

.footer-bottom p {
  color: rgba(250,243,224,0.55);
  font-size: 0.82rem;
}

.footer-quote {
  color: var(--straw);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  font-style: italic;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* ── Page hero (non-home) ── */
.page-hero {
  padding: 5rem 1.5rem 3rem;
  max-width: 1000px;
  margin: 0 auto;
  border-bottom: 1px solid rgba(140,106,93,0.1);
  margin-bottom: 4rem;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 0.75rem;
}

.page-hero p {
  color: rgba(67,52,48,0.65);
  font-size: 1rem;
  max-width: 600px;
}

/* ── Zig-zag layout (About) ── */
.zigzag-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 5rem;
}

@media (min-width: 1024px) {
  .zigzag-block { grid-template-columns: 1fr 1fr; gap: 5rem; }
  .zigzag-block.reverse { direction: rtl; }
  .zigzag-block.reverse > * { direction: ltr; }
}

/* ── Timeline (Events) ── */
.timeline-item {
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 2.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--straw);
  box-shadow: 0 0 0 4px rgba(212,163,115,0.2);
}

.timeline-item::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1.5rem;
  bottom: -2rem;
  width: 2px;
  background: rgba(212,163,115,0.25);
}

.timeline-item:last-child::after { display: none; }

.timeline-item.past::before { background: #ccc; box-shadow: none; }

/* ── Card flip (Cards page) ── */
.card-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1.5rem;
  min-height: 60vh;
}

.card-3d-wrap {
  -webkit-perspective: 1200px;
  perspective: 1200px;
  width: min(280px, 80vw);
  height: min(420px, 60vw + 140px);
  cursor: pointer;
  margin-bottom: 2.5rem;
}

.card-3d {
  width: 100%;
  height: 100%;
  position: relative;
  -webkit-transform-style: preserve-3d;
  transform-style: preserve-3d;
  transition: transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-3d.flipped { transform: rotateY(180deg); }

.card-face {
  position: absolute;
  inset: 0;
  border-radius: 1.25rem;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(140,106,93,0.25);
}

.card-back-face {
  background: linear-gradient(135deg, var(--oak) 0%, #6b4f45 50%, var(--bark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
  color: var(--rice);
}

.card-back-face::before {
  content: '';
  position: absolute;
  inset: 12px;
  border: 2px solid rgba(250,243,224,0.25);
  border-radius: 0.9rem;
}

.card-back-face .card-pattern {
  font-size: 3rem;
  opacity: 0.7;
}

.card-back-face p {
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  opacity: 0.6;
}

.card-front-face {
  transform: rotateY(180deg);
  background: var(--rice);
  display: flex;
  flex-direction: column;
  padding: 2rem 1.5rem;
}

.card-front-face .card-number {
  font-size: 0.75rem;
  color: var(--straw);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.card-front-face .card-image-area {
  flex: 1;
  background: linear-gradient(135deg, var(--sprout) 0%, var(--straw) 100%);
  border-radius: 0.75rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.card-front-face h3 {
  font-size: 1.1rem;
  color: var(--oak);
  margin-bottom: 0.25rem;
}

.card-front-face p {
  font-size: 0.78rem;
  color: var(--bark);
  opacity: 0.7;
  line-height: 1.6;
}

.card-interpretation {
  max-width: 480px;
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s 0.4s, transform 0.8s 0.4s;
  pointer-events: none;
  padding: 0 1rem;
}

.card-interpretation.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.card-interpretation h2 {
  font-size: 1.4rem;
  color: var(--oak);
  margin-bottom: 0.75rem;
  letter-spacing: 0.1em;
}

.card-interpretation p {
  color: var(--bark);
  font-size: 0.95rem;
  line-height: 2;
}

.card-interpretation .card-message {
  font-size: 1.05rem;
  color: var(--straw);
  font-style: italic;
  margin-top: 1rem;
  letter-spacing: 0.05em;
}

/* ── Sidebar layout (Articles) ── */
.sidebar-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 1024px) {
  .sidebar-layout { grid-template-columns: 1fr 280px; }
}

/* ── Article card ── */
.article-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  background: white;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(140,106,93,0.07);
  transition: transform 0.25s, box-shadow 0.25s;
  margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
  .article-card { grid-template-columns: 180px 1fr; }
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(140,106,93,0.14);
}

.article-thumb {
  min-height: 140px;
  background: linear-gradient(135deg, var(--sprout) 0%, #c9b7a8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(67,52,48,0.4);
  font-size: 0.75rem;
}

.article-body { padding: 1.5rem; }

.article-body .date {
  font-size: 0.78rem;
  color: rgba(67,52,48,0.5);
  margin-bottom: 0.4rem;
  letter-spacing: 0.05em;
}

.article-body h3 {
  font-size: 1.05rem;
  color: var(--oak);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.article-body .summary-label {
  font-size: 0.72rem;
  color: var(--straw);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
  text-transform: uppercase;
}

.article-body .summary {
  font-size: 0.85rem;
  color: rgba(67,52,48,0.75);
  line-height: 1.7;
}

/* ── Podcast item ── */
.podcast-item {
  background: white;
  border-radius: 1rem;
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 12px rgba(140,106,93,0.06);
}

.podcast-player-placeholder {
  background: var(--sprout);
  border-radius: 0.75rem;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bark);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  margin-bottom: 1.25rem;
  gap: 0.75rem;
}

/* ── Book grid ── */
.book-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .book-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .book-grid { grid-template-columns: repeat(4, 1fr); }
}

.book-item {
  cursor: pointer;
  transition: transform 0.25s;
}

.book-item:hover { transform: translateY(-4px); }

.book-cover {
  aspect-ratio: 2/3;
  background: linear-gradient(160deg, var(--straw) 0%, var(--oak) 100%);
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(250,243,224,0.6);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  box-shadow: 4px 4px 16px rgba(140,106,93,0.2);
}

.book-title {
  font-size: 0.88rem;
  color: var(--oak);
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 0.25rem;
}

.book-desc {
  font-size: 0.78rem;
  color: rgba(67,52,48,0.6);
  line-height: 1.6;
}

/* ── Event cards ── */
.event-upcoming {
  background: white;
  border-radius: 1rem;
  padding: 2rem;
  border-left: 4px solid var(--straw);
  box-shadow: 0 2px 16px rgba(140,106,93,0.08);
  margin-bottom: 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .event-upcoming { grid-template-columns: auto 1fr auto; align-items: center; }
}

.event-date-badge {
  background: var(--straw);
  color: var(--bark);
  border-radius: 0.75rem;
  padding: 0.75rem 1.25rem;
  text-align: center;
  min-width: 80px;
}

.event-date-badge .month {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.event-date-badge .day {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
}

/* ── CTA block ── */
.cta-block {
  background: linear-gradient(135deg, var(--sprout) 0%, rgba(212,163,115,0.3) 100%);
  border-radius: 1.5rem;
  padding: 4rem 2rem;
  text-align: center;
  margin-top: 5rem;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--rice); }
::-webkit-scrollbar-thumb { background: rgba(140,106,93,0.35); border-radius: 3px; }

/* ── Utilities ── */
.py-section { padding-top: 5rem; padding-bottom: 5rem; }
.py-section-lg { padding-top: 7rem; padding-bottom: 7rem; }

.divider {
  height: 1px;
  background: rgba(140,106,93,0.1);
  margin: 5rem 0;
}

.content-max {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.placeholder-text {
  background: linear-gradient(90deg, rgba(140,106,93,0.08) 0%, rgba(212,163,115,0.15) 50%, rgba(140,106,93,0.08) 100%);
  border-radius: 0.5rem;
  padding: 0.2rem 0.5rem;
  font-style: italic;
  color: rgba(67,52,48,0.45);
  font-size: 0.82rem;
}

/* ── Article body (rendered Markdown prose) ── */
.article-body.prose h1,
.article-body.prose h2,
.article-body.prose h3 {
  color: var(--oak);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.4;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.article-body.prose h1 { font-size: 1.7rem; }
.article-body.prose h2 { font-size: 1.35rem; }
.article-body.prose h3 { font-size: 1.1rem; }

.article-body.prose p {
  line-height: 1.9;
  margin-bottom: 1.4rem;
  color: var(--bark);
}

.article-body.prose blockquote {
  border-left: 3px solid var(--straw);
  margin: 2rem 0;
  padding: 0.75rem 1.5rem;
  background: rgba(212,163,115,0.08);
  border-radius: 0 0.75rem 0.75rem 0;
  font-style: italic;
  color: rgba(67,52,48,0.75);
}

.article-body.prose blockquote p { margin-bottom: 0; }

.article-body.prose code {
  background: rgba(140,106,93,0.1);
  padding: 0.15em 0.45em;
  border-radius: 0.35rem;
  font-size: 0.88em;
  font-family: 'Courier New', Courier, monospace;
  color: var(--oak);
}

.article-body.prose pre {
  background: rgba(67,52,48,0.06);
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.article-body.prose pre code {
  background: none;
  padding: 0;
  font-size: 0.9rem;
  color: var(--bark);
}

.article-body.prose img {
  max-width: 100%;
  border-radius: 0.75rem;
  display: block;
  margin: 2rem auto;
  box-shadow: 0 2px 16px rgba(140,106,93,0.12);
}

.article-body.prose a {
  color: var(--straw);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.2s;
}

.article-body.prose a:hover { opacity: 0.75; }

.article-body.prose ul,
.article-body.prose ol {
  padding-left: 1.6rem;
  margin-bottom: 1.4rem;
}

.article-body.prose li {
  line-height: 1.9;
  margin-bottom: 0.3rem;
}

.article-body.prose hr {
  border: none;
  height: 1px;
  background: rgba(140,106,93,0.15);
  margin: 3rem 0;
}