/* =========================================================
   SouthDakota.co.jp — site.css
   Magazine-style editorial travel site
   ========================================================= */

:root {
  --ink: #17231c;
  --ink-soft: #2f3f35;
  --pine: #25392d;
  --pine-dark: #121f19;
  --sage: #6f8068;
  --grass: #b49755;
  --gold: #d5b56b;
  --sand: #f3ead5;
  --paper: #fbf4e4;
  --paper-deep: #efe0bf;
  --cream: #fff8df;
  --rust: #9b5733;
  --clay: #c48455;
  --blue: #31536b;
  --line: rgba(23, 35, 28, 0.14);
  --white-soft: rgba(255, 255, 255, 0.86);
  --shadow: 0 24px 70px rgba(18, 31, 25, 0.18);
  --shadow-soft: 0 16px 40px rgba(18, 31, 25, 0.12);
  --radius: 24px;
  --radius-sm: 16px;
  --max: 1180px;
}

/* =========================================================
   Base
   ========================================================= */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(213, 181, 107, 0.20), transparent 34rem),
    linear-gradient(180deg, #fff8e8 0%, var(--paper) 38%, #f5ead3 100%);
  font-family:
    "Hiragino Mincho ProN",
    "Yu Mincho",
    "YuMincho",
    "Noto Serif JP",
    "Times New Roman",
    serif;
  line-height: 1.82;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.22;
  z-index: 9999;
  background-image:
    linear-gradient(rgba(23, 35, 28, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 35, 28, 0.025) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px;
  mix-blend-mode: multiply;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

p {
  margin: 0 0 1.1rem;
}

strong {
  font-weight: 800;
}

.container {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.center {
  text-align: center;
}

.mb-0 {
  margin-bottom: 0 !important;
}

/* =========================================================
   Header
   ========================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(18, 31, 25, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.22);
}

.header-inner {
  width: min(1320px, calc(100% - 32px));
  margin-inline: auto;
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--cream);
  text-decoration: none;
  white-space: nowrap;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

.brand span {
  margin-top: 6px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(255, 248, 223, 0.82);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  flex-wrap: wrap;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 9px 11px;
  border-radius: 999px;
  color: rgba(255, 248, 223, 0.94);
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    sans-serif;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.5);
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus,
.site-nav a[aria-current="page"] {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.14);
}

.site-nav a:hover {
  transform: translateY(-1px);
}

/* =========================================================
   Hero
   ========================================================= */

.hero {
  position: relative;
  min-height: 86vh;
  display: grid;
  place-items: end start;
  overflow: hidden;
  color: var(--cream);
  isolation: isolate;
  background: var(--pine-dark);
}

.hero-small {
  min-height: 62vh;
}

.hero-image {
  position: absolute;
  inset: 0;
  height: 100%;
  object-fit: cover;
  z-index: -2;
  filter: saturate(0.95) contrast(1.04);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(10, 18, 14, 0.82) 0%, rgba(10, 18, 14, 0.56) 38%, rgba(10, 18, 14, 0.20) 72%, rgba(10, 18, 14, 0.32) 100%),
    linear-gradient(0deg, rgba(10, 18, 14, 0.62) 0%, transparent 48%);
}

.hero-content {
  width: min(780px, calc(100% - 40px));
  margin-left: max(20px, calc((100vw - var(--max)) / 2));
  margin-bottom: clamp(44px, 9vh, 110px);
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid rgba(255, 248, 223, 0.22);
  border-radius: var(--radius);
  background: rgba(18, 31, 25, 0.46);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.26);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.kicker,
.eyebrow {
  margin-bottom: 0.7rem;
  color: var(--gold);
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    sans-serif;
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.35rem, 5.4vw, 5.8rem);
  line-height: 1.04;
  letter-spacing: -0.055em;
  text-wrap: balance;
}

.hero p {
  max-width: 680px;
  margin-bottom: 1.55rem;
  color: rgba(255, 248, 223, 0.92);
  font-size: clamp(1.02rem, 1.7vw, 1.24rem);
  line-height: 1.85;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.34);
}

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

/* =========================================================
   Buttons
   ========================================================= */

.btn,
.button,
.read-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid rgba(23, 35, 28, 0.18);
  background: var(--pine);
  color: var(--cream);
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    sans-serif;
  font-size: 0.92rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  text-decoration: none;
  box-shadow: 0 14px 26px rgba(18, 31, 25, 0.18);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.btn:hover,
.button:hover,
.read-more:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 34px rgba(18, 31, 25, 0.25);
  background: #1a2d23;
}

.btn.ghost {
  background: rgba(255, 248, 223, 0.12);
  border-color: rgba(255, 248, 223, 0.38);
  color: var(--cream);
}

.btn.light {
  background: var(--cream);
  color: var(--pine-dark);
  border-color: rgba(255, 255, 255, 0.60);
}

.read-more {
  min-height: 38px;
  padding: 9px 15px;
  font-size: 0.86rem;
}

/* =========================================================
   Bands and sections
   ========================================================= */

.start-band {
  padding: 34px 0;
  background:
    linear-gradient(90deg, rgba(37, 57, 45, 0.98), rgba(63, 82, 59, 0.94)),
    var(--pine);
  color: var(--cream);
}

.start-band-inner {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(250px, 0.72fr) minmax(260px, 1.28fr);
  gap: clamp(20px, 5vw, 64px);
  align-items: center;
}

.start-band h2 {
  margin: 0;
  font-size: clamp(1.45rem, 2.8vw, 2.55rem);
  line-height: 1.18;
  letter-spacing: -0.03em;
}

.start-band p {
  margin: 0;
  color: rgba(255, 248, 223, 0.88);
  font-size: 1rem;
  line-height: 1.95;
}

.section,
.section-tight {
  padding: clamp(58px, 9vw, 112px) 0;
}

.section-tight {
  padding-block: clamp(42px, 7vw, 84px);
}

.section-head {
  max-width: 780px;
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.section-head.center {
  margin-inline: auto;
}

.section-head h2 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.9rem, 4vw, 3.5rem);
  line-height: 1.12;
  letter-spacing: -0.055em;
  color: var(--ink);
  text-wrap: balance;
}

.section-head p {
  color: rgba(23, 35, 28, 0.76);
  font-size: 1.04rem;
  line-height: 1.9;
}

.center-actions {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

/* =========================================================
   Cards and grids
   ========================================================= */

.grid {
  display: grid;
  gap: 24px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card,
.feature-card,
.info-card,
.gallery-item {
  overflow: hidden;
  border-radius: var(--radius);
  background: rgba(255, 248, 223, 0.72);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.feature-card a,
.card a {
  display: grid;
  color: inherit;
  text-decoration: none;
  height: 100%;
}

.feature-card img,
.card img,
.gallery-item img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--paper-deep);
  transition: transform 400ms ease;
}

.feature-card:hover img,
.card:hover img,
.gallery-item:hover img {
  transform: scale(1.035);
}

.feature-card-body,
.card-body {
  padding: 22px;
}

.feature-card h3,
.card h3,
.info-card h3 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.18rem, 1.8vw, 1.55rem);
  line-height: 1.32;
  letter-spacing: -0.025em;
}

.feature-card p,
.card p,
.info-card p {
  color: rgba(23, 35, 28, 0.76);
  font-size: 0.97rem;
  line-height: 1.82;
}

.info-card {
  padding: 24px;
}

.info-card a {
  color: #2d5d69;
  word-break: break-word;
}

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

/* =========================================================
   Feature list rows
   ========================================================= */

.feature-list {
  display: grid;
  gap: 24px;
}

.feature-row {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(300px, 1.1fr);
  gap: clamp(22px, 4vw, 42px);
  align-items: center;
  padding: clamp(16px, 2vw, 22px);
  border-radius: calc(var(--radius) + 6px);
  background: rgba(255, 248, 223, 0.74);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.feature-row img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius);
}

.feature-row h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.45rem, 2.8vw, 2.45rem);
  line-height: 1.16;
  letter-spacing: -0.045em;
}

.feature-row p {
  color: rgba(23, 35, 28, 0.75);
  font-size: 1rem;
  line-height: 1.9;
}

/* =========================================================
   Overlay card
   ========================================================= */

.overlay-card {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border-radius: calc(var(--radius) + 8px);
  box-shadow: var(--shadow);
  isolation: isolate;
  background: var(--pine-dark);
}

.overlay-card img {
  position: absolute;
  inset: 0;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.overlay-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(10, 18, 14, 0.82), rgba(10, 18, 14, 0.42) 52%, rgba(10, 18, 14, 0.18)),
    linear-gradient(0deg, rgba(10, 18, 14, 0.55), transparent 50%);
}

.overlay-card-content {
  width: min(640px, calc(100% - 40px));
  padding: clamp(28px, 5vw, 54px);
  color: var(--cream);
}

.overlay-card h3 {
  margin: 0 0 0.9rem;
  font-size: clamp(2rem, 4.2vw, 4.1rem);
  line-height: 1.07;
  letter-spacing: -0.055em;
}

.overlay-card p {
  color: rgba(255, 248, 223, 0.90);
  font-size: 1.05rem;
  line-height: 1.88;
}

/* =========================================================
   Split panels
   ========================================================= */

.split {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(300px, 0.88fr);
  gap: clamp(24px, 5vw, 60px);
  align-items: center;
  padding: clamp(18px, 3vw, 28px);
  border-radius: calc(var(--radius) + 8px);
  background: rgba(255, 248, 223, 0.70);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.split.reverse {
  grid-template-columns: minmax(300px, 0.88fr) minmax(280px, 1fr);
}

.split.reverse .split-image {
  order: 2;
}

.split-image img {
  aspect-ratio: 16 / 11;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: 0 18px 50px rgba(18, 31, 25, 0.18);
}

.split-text {
  padding: clamp(10px, 2vw, 20px);
}

.split-text h2 {
  margin: 0 0 0.9rem;
  font-size: clamp(1.8rem, 3.6vw, 3.1rem);
  line-height: 1.12;
  letter-spacing: -0.055em;
}

.split-text p {
  color: rgba(23, 35, 28, 0.76);
  font-size: 1rem;
  line-height: 1.92;
}

/* =========================================================
   Dark and paper panels
   ========================================================= */

.dark-panel,
.paper-panel {
  padding: clamp(28px, 5vw, 58px);
  border-radius: calc(var(--radius) + 8px);
  box-shadow: var(--shadow-soft);
}

.dark-panel {
  color: var(--cream);
  background:
    radial-gradient(circle at top right, rgba(213, 181, 107, 0.22), transparent 24rem),
    linear-gradient(135deg, #13231b, #263e31);
  border: 1px solid rgba(255, 248, 223, 0.14);
}

.dark-panel h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 3.8vw, 3.35rem);
  line-height: 1.12;
  letter-spacing: -0.052em;
}

.dark-panel p {
  max-width: 920px;
  color: rgba(255, 248, 223, 0.88);
  font-size: 1.03rem;
  line-height: 1.95;
}

.paper-panel {
  background:
    linear-gradient(180deg, rgba(255, 248, 223, 0.88), rgba(239, 224, 191, 0.78)),
    var(--paper);
  border: 1px solid var(--line);
}

.paper-panel h2 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.7rem, 3.4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.045em;
}

.paper-panel p {
  color: rgba(23, 35, 28, 0.78);
  font-size: 1.02rem;
  line-height: 1.95;
}

/* =========================================================
   Article layout
   ========================================================= */

.article-wrap {
  padding: clamp(58px, 8vw, 108px) 0;
}

.article-content {
  width: min(820px, calc(100% - 40px));
  margin-inline: auto;
}

.article-content h2 {
  margin: clamp(2.8rem, 7vw, 5.5rem) 0 1.1rem;
  font-size: clamp(1.7rem, 3.4vw, 2.8rem);
  line-height: 1.18;
  letter-spacing: -0.04em;
  color: var(--ink);
}

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

.article-content p {
  font-size: clamp(1.02rem, 1.4vw, 1.13rem);
  line-height: 2.08;
  color: rgba(23, 35, 28, 0.83);
}

.article-content blockquote {
  margin: 2.6rem 0;
  padding: 1.4rem 1.6rem;
  color: var(--pine-dark);
  background: rgba(213, 181, 107, 0.20);
  border-left: 6px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.75;
  font-weight: 800;
}

.article-figure {
  margin: clamp(2.2rem, 5vw, 4rem) 0;
}

.article-figure img {
  border-radius: calc(var(--radius) + 6px);
  box-shadow: var(--shadow);
}

.article-figure figcaption {
  margin-top: 0.75rem;
  color: rgba(23, 35, 28, 0.62);
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    sans-serif;
  font-size: 0.88rem;
  line-height: 1.7;
}

/* =========================================================
   Gallery
   ========================================================= */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.gallery-item {
  margin: 0;
}

.gallery-item a {
  display: block;
  overflow: hidden;
}

.gallery-item img {
  aspect-ratio: 16 / 10;
}

.gallery-caption {
  padding: 15px 17px 17px;
  color: rgba(23, 35, 28, 0.78);
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    sans-serif;
  font-size: 0.9rem;
  font-weight: 800;
  line-height: 1.55;
}

/* =========================================================
   Footer
   ========================================================= */

.site-footer {
  color: var(--cream);
  background:
    radial-gradient(circle at top right, rgba(213, 181, 107, 0.16), transparent 26rem),
    linear-gradient(180deg, #17231c, #101a15);
  border-top: 1px solid rgba(255, 248, 223, 0.12);
}

.footer-inner {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
  padding: 52px 0 34px;
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(260px, 0.9fr);
  gap: 32px;
}

.footer-brand {
  margin-bottom: 0.7rem;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.site-footer p {
  color: rgba(255, 248, 223, 0.76);
  line-height: 1.85;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
  justify-content: flex-end;
}

.footer-links a {
  display: inline-flex;
  padding: 9px 12px;
  border-radius: 999px;
  color: rgba(255, 248, 223, 0.84);
  background: rgba(255, 255, 255, 0.08);
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    sans-serif;
  font-size: 0.86rem;
  font-weight: 800;
  text-decoration: none;
}

.footer-links a:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

.copyright {
  padding: 18px 20px 26px;
  color: rgba(255, 248, 223, 0.58);
  text-align: center;
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    sans-serif;
  font-size: 0.82rem;
}

/* =========================================================
   Utility compatibility
   ========================================================= */

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-cloud a {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(37, 57, 45, 0.10);
  border: 1px solid rgba(37, 57, 45, 0.16);
  color: var(--pine);
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    sans-serif;
  font-size: 0.86rem;
  font-weight: 800;
  text-decoration: none;
}

/* =========================================================
   Responsive
   ========================================================= */

@media (max-width: 1100px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .site-nav {
    justify-content: flex-start;
    overflow-x: auto;
    max-width: 100%;
    padding-bottom: 4px;
  }

  .site-nav a {
    white-space: nowrap;
  }

  .hero {
    min-height: 78vh;
  }

  .hero-small {
    min-height: 56vh;
  }
}

@media (max-width: 880px) {
  .start-band-inner,
  .feature-row,
  .split,
  .split.reverse,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .split.reverse .split-image {
    order: initial;
  }

  .grid.two,
  .grid.three,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .hero-content {
    margin-inline: 20px;
    width: auto;
  }

  .overlay-card {
    min-height: 560px;
  }

  .overlay-card-content {
    width: auto;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .container,
  .article-content,
  .start-band-inner,
  .footer-inner {
    width: min(100% - 28px, var(--max));
  }

  .header-inner {
    width: calc(100% - 24px);
  }

  .brand {
    font-size: 1.05rem;
  }

  .site-nav {
    gap: 3px;
  }

  .site-nav a {
    padding: 8px 10px;
    font-size: 0.78rem;
  }

  .hero {
    min-height: 82vh;
  }

  .hero-content {
    margin-inline: 14px;
    margin-bottom: 28px;
    padding: 22px;
    border-radius: 20px;
  }

  .hero h1 {
    font-size: clamp(2.1rem, 13vw, 3.5rem);
  }

  .hero p {
    font-size: 0.98rem;
    line-height: 1.78;
  }

  .section,
  .section-tight,
  .article-wrap {
    padding-block: 48px;
  }

  .feature-card-body,
  .card-body,
  .info-card {
    padding: 18px;
  }

  .feature-row {
    padding: 14px;
  }

  .dark-panel,
  .paper-panel {
    padding: 24px;
    border-radius: 22px;
  }

  .article-content p {
    line-height: 1.95;
  }
}

/* =========================================================
   Print
   ========================================================= */

@media print {
  .site-header,
  .site-footer,
  .hero-actions,
  .center-actions {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .hero {
    min-height: auto;
    color: #000;
    background: #fff;
    padding: 40px 0;
  }

  .hero-image,
  .hero::after {
    display: none;
  }

  .hero-content {
    margin: 0 auto;
    color: #000;
    background: none;
    border: none;
    box-shadow: none;
    backdrop-filter: none;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}