/* =========================================================
   Castle Travel Guide — Japanese Editorial Theme
   Vanilla HTML, no framework. CSS custom properties.
   ========================================================= */

:root {
  --bg: #f7f3ec;
  --bg-2: #efe8da;
  --card: #ffffff;
  --card-2: #fbfaf6;
  --line: #d8cdb9;
  --ink: #1c1a17;
  --ink-soft: #4a443d;
  --muted: #7a7268;
  --accent: #8a3324;        /* a deep crimson sumi */
  --accent-2: #b86a3f;
  --gold: #c9952a;
  --indigo: #2f3a5a;
  --shadow: 0 6px 24px rgba(28,26,23,0.07);
  --shadow-lg: 0 12px 40px rgba(28,26,23,0.10);
  --radius: 4px;
  --radius-lg: 8px;
  --container: 1100px;
  --gutter: 24px;
  --duration: 320ms;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

html[data-lang="ja"] body {
  font-family: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  font-weight: 400;
}

html[data-lang="en"] body {
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--duration) ease;
}
a:hover, a:focus { color: var(--accent-2); outline: none; }

p { margin: 0 0 1em 0; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
  margin-bottom: 12px;
}

.section-heading {
  font-family: 'Noto Serif JP', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: clamp(1.6rem, 2.4vw, 2.4rem);
  line-height: 1.3;
  color: var(--ink);
  margin: 0 0 0.6em 0;
}

.section-lede {
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 720px;
  margin: 0;
}

.section-header {
  text-align: center;
  margin: 0 auto 42px auto;
  max-width: 760px;
}
.section-header .eyebrow { display: inline-block; }
.section-header .section-heading { text-align: center; }
.section-header .section-lede { margin-left: auto; margin-right: auto; text-align: center; }

.btn-primary, .btn-secondary {
  display: inline-block;
  font-weight: 600;
  border: 1px solid transparent;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--duration) ease;
  text-align: center;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-2); border-color: var(--accent-2); color: #fff; }
.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}
.btn-secondary:hover { background: var(--ink); color: #fff; }

/* ----- Header ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247,243,236,0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px var(--gutter);
}
.nav-brand {
  font-family: 'Noto Serif JP', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  letter-spacing: 0.04em;
}
.nav-brand:hover { color: var(--accent); }
.nav-desktop {
  margin-left: auto;
  display: flex;
  gap: 26px;
}
.nav-desktop a {
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.nav-desktop a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.lang-toggle {
  display: flex;
  gap: 6px;
  margin-left: 14px;
}
.lang-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.82rem;
  padding: 6px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--duration) ease;
}
.lang-btn.active, .lang-btn:hover {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.hamburger {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  margin-left: 10px;
}
.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink-soft);
  margin: 4px 0;
}
.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 14px var(--gutter);
  background: var(--card);
  border-top: 1px solid var(--line);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  padding: 10px 4px;
  color: var(--ink);
  font-weight: 500;
  border-bottom: 1px solid var(--line);
}
.nav-mobile a:last-child { border-bottom: none; }

@media (max-width: 900px) {
  .nav-desktop { display: none; }
  .hamburger { display: inline-block; }
  .lang-toggle { margin-left: auto; }
}

/* ----- Hero ----- */
.hero {
  position: relative;
  min-height: 540px;
  padding: 100px 0 80px 0;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: var(--img-hero);
  background-size: cover;
  background-position: center 30%;
  filter: brightness(0.55) saturate(0.95);
  z-index: -1;
}
.hero-content {
  color: #fff;
  max-width: 760px;
  text-align: left;
}
.hero-content .eyebrow {
  color: #ffd789;
  border-bottom-color: #ffd789;
}
.hero-heading {
  font-family: 'Noto Serif JP', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: clamp(2.1rem, 4.5vw, 3.8rem);
  line-height: 1.2;
  margin: 0 0 22px 0;
  color: #fff;
  text-shadow: 0 2px 16px rgba(0,0,0,0.35);
}
.hero-lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  margin: 0 0 36px 0;
  line-height: 1.7;
  color: rgba(255,255,255,0.92);
  text-shadow: 0 1px 8px rgba(0,0,0,0.4);
  max-width: 640px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero .btn-primary { background: #fff; color: var(--ink); border-color: #fff; }
.hero .btn-primary:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.hero .btn-secondary { color: #fff; border-color: #fff; }
.hero .btn-secondary:hover { background: #fff; color: var(--ink); }

/* ----- Intro ----- */
.intro {
  padding: 80px 0;
  background: var(--bg);
}
.intro-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 60px;
  align-items: center;
}
.intro-text .section-heading { margin: 0 0 16px 0; }
.intro-text p {
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.85;
}
.intro-figure img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
@media (max-width: 800px) {
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .intro-figure img { height: 260px; }
}

/* ----- Articles ----- */
.articles {
  padding: 80px 0 90px 0;
  background: var(--bg-2);
}
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
@media (max-width: 760px) {
  .article-grid { grid-template-columns: 1fr; }
}

.article-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform var(--duration) ease, box-shadow var(--duration) ease;
}
.article-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.article-thumb img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
  transition: transform 600ms ease;
}
.article-card:hover .article-thumb img { transform: scale(1.02); }
.article-body {
  padding: 26px 24px 22px 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.article-eyebrow { font-size: 0.7rem; }
.article-title {
  font-family: 'Noto Serif JP', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: 1.22rem;
  line-height: 1.45;
  margin: 0 0 10px 0;
  color: var(--ink);
}
.article-summary {
  color: var(--ink-soft);
  font-size: 0.96rem;
  line-height: 1.7;
  margin: 0 0 18px 0;
  flex-grow: 1;
}
.article-toggle {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 9px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.88rem;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--duration) ease;
}
.article-toggle:hover { background: var(--accent); color: #fff; }
.article-toggle .chev { transition: transform var(--duration) ease; }
.article-toggle[aria-expanded="true"] .chev,
.article-toggle.open .chev { transform: rotate(180deg); }

.article-expand {
  max-height: 0;
  overflow: hidden;
  transition: max-height 600ms ease, margin-top 600ms ease;
}
.article-expand.open {
  max-height: 1500px;
  margin-top: 18px;
}
.article-expand p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.85;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

/* ----- Tips ----- */
.tips { padding: 80px 0; background: var(--bg); }
.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 980px) { .tips-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .tips-grid { grid-template-columns: 1fr; } }

.tip-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 22px 20px 22px 20px;
  display: flex;
  flex-direction: column;
}
.tip-num {
  display: block;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  color: var(--gold);
  font-size: 1.4rem;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}
.tip-card h3 {
  font-family: 'Noto Serif JP', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 10px 0;
  color: var(--ink);
  line-height: 1.4;
}
.tip-card p {
  color: var(--ink-soft);
  font-size: 0.93rem;
  line-height: 1.7;
  margin: 0;
}

/* ----- Seasonal ----- */
.seasonal { padding: 80px 0; background: var(--bg-2); }
.seasonal-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
@media (max-width: 960px) { .seasonal-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .seasonal-grid { grid-template-columns: 1fr; } }

.season-card {
  color: #fff;
  padding: 28px 22px 26px 22px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 240px;
}
.season-spring { background: linear-gradient(135deg, #2d6a4f, #52b788); }
.season-summer { background: linear-gradient(135deg, #9d4b00, #e07b39); }
.season-autumn { background: linear-gradient(135deg, #7f4f24, #b5752a); }
.season-winter { background: linear-gradient(135deg, #1b4965, #3a8fb7); }
.season-icon { width: 28px; height: 28px; color: rgba(255,255,255,0.85); margin-bottom: 14px; }
.season-card h3 {
  font-family: 'Noto Serif JP', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: 1.5rem;
  margin: 0 0 4px 0;
  color: #fff;
}
.season-period {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.season-card p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.95);
  margin: 0;
}

/* ----- FAQ ----- */
.faq { padding: 80px 0; background: var(--bg); }
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 22px 6px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-family: 'Noto Serif JP', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--ink);
  transition: color var(--duration) ease;
}
.faq-question:hover { color: var(--accent); }
.faq-question .chev { transition: transform var(--duration) ease; flex-shrink: 0; }
.faq-question[aria-expanded="true"] .chev { transform: rotate(180deg); color: var(--accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 400ms ease;
}
.faq-item.open .faq-answer { max-height: 600px; }
.faq-answer p {
  margin: 0;
  padding: 4px 6px 22px 6px;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ----- Newsletter ----- */
.newsletter {
  padding: 80px 0;
  background: var(--bg-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.newsletter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}
@media (max-width: 880px) { .newsletter-grid { grid-template-columns: 1fr; gap: 28px; } }
.newsletter-text .section-heading { margin: 0 0 12px 0; }
.newsletter-form {
  background: var(--card);
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow);
}
.newsletter-field { display: flex; flex-direction: column; gap: 6px; font-size: 0.92rem; }
.newsletter-field span { font-weight: 600; color: var(--ink-soft); }
.newsletter-field input {
  font: inherit;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--ink);
  display: block;
  width: 100%;
}
.newsletter-field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(138,51,36,0.12);
}
.newsletter-consent {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.5;
}
.newsletter-consent input { margin-top: 3px; flex-shrink: 0; }
.newsletter-status {
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0;
  min-height: 1.4em;
}
.newsletter-status.error { color: #b3261e; }
.newsletter-status.success { color: #2d6a4f; }

/* ----- Footer ----- */
.site-footer {
  background: #1c1a17;
  color: rgba(255,255,255,0.85);
  padding: 60px 0 30px 0;
  font-size: 0.92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 40px;
}
@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
.footer-brand-name {
  font-family: 'Noto Serif JP', 'Yu Mincho', serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: #fff;
  display: block;
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.footer-tagline {
  color: rgba(255,255,255,0.75);
  line-height: 1.7;
  margin: 0;
  max-width: 420px;
}
.footer-col h4 {
  font-family: 'Noto Serif JP', 'Yu Mincho', serif;
  font-weight: 700;
  color: #fff;
  font-size: 0.95rem;
  margin: 0 0 14px 0;
  letter-spacing: 0.04em;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 9px; }
.footer-col a {
  color: rgba(255,255,255,0.78);
  font-size: 0.9rem;
}
.footer-col a:hover { color: #ffd789; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}
.footer-copy { margin: 0; }
.footer-meta { margin: 0; }

/* ----- Scroll reveal ----- */
.js-reveal .reveal { opacity: 0; transform: translateY(16px); transition: opacity 600ms ease, transform 600ms ease; }
.js-reveal .reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .js-reveal .reveal { opacity: 1; transform: none; transition: none; }
}

/* Apply reveal to natural sections */
.intro, .articles, .tips, .seasonal, .faq, .newsletter { position: relative; }

/* i18n-ready class set after dicts load — keep everything visible by default */
.i18n-error .lang-toggle { display: none; }