/* ===========================================================
   USA Travel Guide for Japanese Expats — Stylesheet
   =========================================================== */

:root {
  /* Palette */
  --color-bg: #faf8f4;
  --color-surface: #ffffff;
  --color-ink: #1f2a2e;
  --color-ink-soft: #5b6b6f;
  --color-border: #e7e1d6;

  --color-primary: #1f5f5b;      /* deep teal */
  --color-primary-dark: #143f3c;
  --color-accent: #d97b4f;       /* warm terracotta */
  --color-accent-soft: #f3d9c8;

  --color-parks: #2f6b4f;
  --color-cities: #2b5c8a;
  --color-family: #c2793f;
  --color-hotels: #7a4f8a;
  --color-savings: #b8433f;
  --color-events: #b8962f;
  --color-gourmet: #b8386a;

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;

  --shadow-sm: 0 2px 8px rgba(31, 42, 46, 0.06);
  --shadow-md: 0 8px 24px rgba(31, 42, 46, 0.10);
  --shadow-lg: 0 16px 40px rgba(31, 42, 46, 0.14);

  --max-width: 1120px;
  --header-h: 64px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------------- Header ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(250, 248, 244, 0.9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-primary-dark);
  letter-spacing: 0.01em;
}

.logo .mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  transition: color 0.2s ease;
}

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

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
  transition: all 0.2s ease;
}

.nav-toggle span::before {
  position: absolute;
  top: -7px;
}

.nav-toggle span::after {
  position: absolute;
  top: 7px;
}

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 76px 0 88px;
  background:
    radial-gradient(circle at 15% 20%, rgba(217, 123, 79, 0.16), transparent 45%),
    radial-gradient(circle at 85% 0%, rgba(31, 95, 91, 0.18), transparent 50%),
    var(--color-bg);
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: rgba(31, 95, 91, 0.08);
  border: 1px solid rgba(31, 95, 91, 0.18);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 3.1rem);
  line-height: 1.35;
  margin: 0 0 18px;
  color: var(--color-primary-dark);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-accent);
}

.hero p {
  font-size: 1.02rem;
  color: var(--color-ink-soft);
  max-width: 560px;
  margin: 0 0 32px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary-dark);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.hero-stats {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 520px;
}

.hero-stat .num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
}

.hero-stat .label {
  font-size: 0.8rem;
  color: var(--color-ink-soft);
}

/* ---------------- Section shell ---------------- */
.section {
  padding: 64px 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.section-head h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  margin: 0 0 6px;
  color: var(--color-primary-dark);
  font-weight: 800;
}

.section-head p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 0.95rem;
}

.section-head .link-more {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}

/* ---------------- Category grid ---------------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  color: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.category-card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.92;
  z-index: 0;
}

.category-card.parks::before { background: linear-gradient(155deg, #3d8763, #1d4d34); }
.category-card.cities::before { background: linear-gradient(155deg, #3f7cb0, #1c3f63); }
.category-card.family::before { background: linear-gradient(155deg, #e0995f, #a85a2c); }
.category-card.hotels::before { background: linear-gradient(155deg, #9a6bab, #5c3568); }
.category-card.savings::before { background: linear-gradient(155deg, #cf5850, #7a201d); }
.category-card.events::before { background: linear-gradient(155deg, #e0b04f, #8a641a); }
.category-card.gourmet::before { background: linear-gradient(155deg, #d4699a, #7a1d42); }

.category-card .icon,
.category-card .card-title,
.category-card .card-desc,
.category-card .card-count {
  position: relative;
  z-index: 1;
}

.category-card .icon {
  font-size: 1.9rem;
  margin-bottom: 14px;
}

.category-card .card-title {
  font-size: 1.18rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.category-card .card-desc {
  font-size: 0.86rem;
  opacity: 0.92;
  margin-bottom: 14px;
}

.category-card .card-count {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.18);
  padding: 5px 12px;
  border-radius: 999px;
  width: fit-content;
}

/* ---------------- Article/Card grid (used across pages) ---------------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.article-card {
  background: var(--color-surface);
  border-radius: 18px;
  overflow: hidden;
  border: none;
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.article-thumb {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.4rem;
  color: #fff;
}

.article-body {
  padding: 18px 20px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.article-body h3 {
  font-size: 1.04rem;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--color-ink);
  font-weight: 700;
}

.article-body p {
  font-size: 0.86rem;
  color: var(--color-ink-soft);
  margin: 0 0 14px;
  flex: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--color-ink-soft);
  border-top: 1px dashed var(--color-border);
  padding-top: 12px;
}

/* ---------------- Why section ---------------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.why-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.why-item .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--color-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 14px;
}

.why-item h3 {
  font-size: 1rem;
  margin: 0 0 8px;
  color: var(--color-ink);
}

.why-item p {
  font-size: 0.86rem;
  color: var(--color-ink-soft);
  margin: 0;
}

/* ---------------- Newsletter / CTA band ---------------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary-dark), var(--color-primary));
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cta-band h2 {
  margin: 0 0 8px;
  font-size: 1.4rem;
}

.cta-band p {
  margin: 0;
  opacity: 0.85;
  font-size: 0.92rem;
  max-width: 440px;
}

.cta-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.cta-form input[type="email"] {
  padding: 12px 16px;
  border-radius: 999px;
  border: none;
  min-width: 240px;
  font-size: 0.9rem;
  font-family: inherit;
}

.cta-form .btn-primary {
  background: var(--color-accent);
}

.cta-form .btn-primary:hover {
  background: #c1683c;
}

/* ---------------- Footer ---------------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 48px 0 28px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 32px;
}

.footer-grid h4 {
  color: #fff;
  font-size: 0.88rem;
  margin: 0 0 14px;
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-grid a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
}

.footer-grid a:hover {
  color: #fff;
}

.footer-brand p {
  font-size: 0.84rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 280px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
  font-size: 0.78rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------------- Article detail page ---------------- */
.article-hero {
  padding: 40px 0 0;
}

.article-hero .breadcrumb {
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  margin-bottom: 18px;
}

.article-hero .breadcrumb a {
  color: var(--color-primary);
}

.article-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.article-pill {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 5px 13px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.045);
  color: var(--color-ink-soft);
  border: none;
}

.article-hero h1 {
  font-size: clamp(1.9rem, 4.2vw, 2.9rem);
  line-height: 1.28;
  letter-spacing: -0.025em;
  margin: 0 0 20px;
  color: var(--color-ink);
  font-weight: 700;
}

.article-byline {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 0;
}

.article-byline .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-ink-soft);
}

.article-banner {
  height: 260px;
  border-radius: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: #fff;
  margin: 32px 0 8px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.article-banner-photo {
  padding: 0;
}

.article-banner-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-credit {
  font-size: 0.72rem;
  color: var(--color-ink-soft);
  text-align: right;
  margin: 0 0 8px;
}

.photo-credit a {
  color: var(--color-primary);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 720px) 260px;
  gap: 48px;
  align-items: start;
  padding: 40px 0 0;
}

.prose h2 {
  font-size: clamp(1.3rem, 2vw, 1.5rem);
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 52px 0 16px;
  font-weight: 700;
}

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

.prose p {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--color-ink);
  margin: 0 0 18px;
}

.prose ul,
.prose ol {
  margin: 0 0 18px;
  padding-left: 22px;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--color-ink);
}

.prose li {
  margin-bottom: 9px;
}

.prose strong {
  color: var(--color-ink);
  font-weight: 700;
}

.prose figure {
  margin: 32px 0;
}

.prose figure img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  border-radius: 20px;
  display: block;
  box-shadow: var(--shadow-md);
}

.prose figcaption {
  font-size: 0.82rem;
  color: var(--color-ink-soft);
  margin-top: 8px;
  text-align: center;
}

.prose figure.map-figure svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: #fbf9f4;
  box-shadow: var(--shadow-sm);
}

/* ---------------- Credit card visual (CSS-illustrated, no real card art) ---------------- */
.cc-card-figure {
  margin: 28px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.cc-card-photo {
  width: 100%;
  max-width: 380px;
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  display: block;
}

.cc-card {
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1.586 / 1;
  border-radius: 18px;
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

.cc-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(255, 255, 255, 0.22) 0%, rgba(255, 255, 255, 0) 38%);
  pointer-events: none;
}

.cc-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  position: relative;
  z-index: 1;
}

.cc-card-issuer {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.92;
}

.cc-card-network {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.85;
}

.cc-chip {
  width: 42px;
  height: 32px;
  border-radius: 6px;
  background: linear-gradient(135deg, #f4e2b8, #c9a256 60%, #8f6f2e);
  position: relative;
  z-index: 1;
}

.cc-chip::before {
  content: "";
  position: absolute;
  inset: 5px 4px;
  border-radius: 3px;
  background:
    linear-gradient(to right, rgba(0, 0, 0, 0.28) 1px, transparent 1px) 0 0/33% 100%,
    linear-gradient(to bottom, rgba(0, 0, 0, 0.28) 1px, transparent 1px) 0 0/100% 50%;
  opacity: 0.7;
}

.cc-card-bottom {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cc-card-name {
  font-size: clamp(1.05rem, 3vw, 1.25rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.cc-card-number {
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  opacity: 0.82;
}

.cc-chase {
  background: linear-gradient(135deg, #07264c 0%, #0f3d78 45%, #1c62b3 100%);
  color: #fff;
}

.cc-amex-gold {
  background: linear-gradient(135deg, #8a6a2c 0%, #c9a256 50%, #e7cd8f 100%);
  color: #3a2c0d;
}

.cc-usbank {
  background: linear-gradient(135deg, #5c0a1e 0%, #8a1030 45%, #b81b3f 100%);
  color: #fff;
}

/* ---------------- Comparison table ---------------- */
.table-wrap {
  overflow-x: auto;
  margin: 28px 0;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
}

.compare-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  background: var(--color-surface);
  font-size: 0.9rem;
}

.compare-table th,
.compare-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
  line-height: 1.6;
}

.compare-table thead th {
  background: rgba(31, 95, 91, 0.07);
  color: var(--color-primary-dark);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-table tbody tr:hover {
  background: rgba(31, 95, 91, 0.035);
}

.compare-table td:first-child {
  font-weight: 700;
  color: var(--color-ink);
  white-space: nowrap;
}

.map-link {
  font-size: 0.74rem;
  font-weight: 700;
  padding: 4px 11px;
  border-radius: 999px;
  background: rgba(26, 115, 232, 0.08);
  color: #1a73e8;
  border: 1px solid rgba(26, 115, 232, 0.2);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  text-decoration: none;
  transition: background 0.15s ease;
}

.map-link:hover {
  background: rgba(26, 115, 232, 0.16);
}

.map-link-inline {
  color: #1a73e8;
  text-decoration: underline;
  text-decoration-color: rgba(26, 115, 232, 0.35);
  text-underline-offset: 2px;
}

.map-link-inline:hover {
  text-decoration-color: #1a73e8;
}

.spot-card {
  background: var(--color-surface);
  border: none;
  border-radius: 18px;
  padding: 22px 24px;
  margin: 22px 0;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.spot-card:hover {
  box-shadow: var(--shadow-md);
}

.spot-card h3 {
  font-size: 1.08rem;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.spot-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.spot-meta span {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 4px 11px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.045);
  color: var(--color-ink-soft);
  border: none;
}

.spot-card p {
  margin: 0 0 10px;
}

.spot-card p:last-child {
  margin-bottom: 0;
}

.spot-card .tip {
  background: var(--color-accent-soft);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 0.86rem;
  color: #6b3d1f;
  margin-top: 12px;
}

.info-box {
  background: var(--color-surface);
  border: none;
  border-radius: 16px;
  padding: 20px 22px;
  margin: 28px 0;
  box-shadow: var(--shadow-sm);
}

.info-box .info-title {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--color-ink);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.info-box p,
.info-box ul {
  font-size: 0.9rem;
  line-height: 1.75;
  margin: 0;
}

.info-box ul {
  padding-left: 18px;
}

.info-box li {
  margin-bottom: 7px;
}

.article-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-card {
  background: var(--color-surface);
  border: none;
  border-radius: 18px;
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.sidebar-card h4 {
  font-size: 0.85rem;
  letter-spacing: -0.005em;
  margin: 0 0 14px;
  color: var(--color-ink);
}

.sidebar-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-card li a {
  font-size: 0.84rem;
  color: var(--color-ink-soft);
  display: flex;
  gap: 8px;
  transition: color 0.2s ease;
}

.sidebar-card li a:hover {
  color: var(--color-primary);
}

.back-to-category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.related-section {
  border-top: 1px solid var(--color-border);
  margin-top: 56px;
  padding-top: 40px;
}

/* ---------------- Breadcrumb / page header (category pages) ---------------- */
.page-header {
  padding: 40px 0 32px;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb {
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  margin-bottom: 14px;
}

.breadcrumb a {
  color: var(--color-primary);
}

.page-header h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  margin: 0 0 10px;
  color: var(--color-primary-dark);
}

.page-header p {
  color: var(--color-ink-soft);
  max-width: 600px;
  margin: 0;
}

.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 26px 0 4px;
}

.filter-chip {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-chip.active,
.filter-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(31, 95, 91, 0.06);
}

/* ---------------- Responsive ---------------- */
@media (max-width: 980px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .why-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    position: static;
    flex-direction: row;
    overflow-x: auto;
  }
  .article-sidebar .sidebar-card {
    min-width: 260px;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    gap: 0;
    padding: 8px 20px 20px;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li {
    border-top: 1px solid var(--color-border);
  }

  .nav-links a {
    display: block;
    padding: 14px 4px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero {
    padding: 48px 0 56px;
  }

  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    max-width: 100%;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .cta-band {
    padding: 32px 24px;
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-form {
    width: 100%;
  }

  .cta-form input[type="email"] {
    flex: 1;
    min-width: 0;
  }

  .section {
    padding: 44px 0;
  }

  .article-banner {
    height: 180px;
    font-size: 2.6rem;
  }

  .article-sidebar {
    flex-direction: column;
  }

  .article-sidebar .sidebar-card {
    min-width: 0;
  }
}

/* ===== USA map section ===== */
.usa-map-wrap {
  display: flex;
  gap: 40px;
  align-items: flex-start;
  margin-top: 32px;
  position: relative;
}

.usa-map-scroll {
  flex: 1 1 640px;
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
}

.usa-map {
  display: block;
  width: 100%;
  min-width: 560px;
  height: auto;
  background: #fbf9f4;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 8px;
}

.usa-map .separator1 {
  fill: none;
}

.map-context-land {
  fill: #efe9db;
}

.map-pin {
  cursor: pointer;
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 0.15s ease;
}

.map-pin:hover,
.map-pin:focus-visible {
  transform: scale(1.35);
}

.map-pin circle {
  stroke: #fff;
  stroke-width: 2;
}

.map-pin.park circle {
  fill: var(--color-parks);
}

.map-pin.city circle {
  fill: var(--color-cities);
}

.map-pin.intl circle {
  fill: var(--color-accent);
}

.map-pin text {
  fill: #fff;
  font-size: 10px;
  font-weight: 800;
  font-family: "Noto Sans JP", sans-serif;
  pointer-events: none;
}

.map-legend {
  flex: 0 0 280px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.map-legend h4 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  margin: 0 0 10px;
  color: var(--color-ink);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.legend-dot.park {
  background: var(--color-parks);
}

.legend-dot.city {
  background: var(--color-cities);
}

.legend-dot.intl {
  background: var(--color-accent);
}

.map-legend ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.map-legend li a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--color-ink-soft);
  text-decoration: none;
  padding: 4px 0;
  border-radius: 6px;
  transition: color 0.15s ease;
}

.map-legend li a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.legend-num {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-ink-soft);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.map-tooltip {
  position: fixed;
  z-index: 50;
  pointer-events: none;
  background: var(--color-ink);
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  font-size: 0.82rem;
  line-height: 1.5;
  width: 220px;
}

.map-tooltip[hidden] {
  display: none;
}

.map-tooltip-name {
  font-weight: 700;
  font-size: 0.88rem;
  margin-bottom: 2px;
}

.map-tooltip-season {
  color: #d8d3c8;
}

.map-tooltip-stars {
  color: #f2c94c;
  letter-spacing: 1px;
  margin-top: 2px;
}

@media (max-width: 860px) {
  .usa-map-wrap {
    flex-direction: column;
  }
  .map-legend {
    flex: 1 1 auto;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 32px;
    width: 100%;
  }
  .map-legend > div {
    flex: 1 1 240px;
  }
}