/* ==========================================================================
   SALTY STUDIO — 共通スタイルシート
   デザイントークン: 深いティール × 珊瑚色 / 貝殻スパイラルモチーフ
   見出し: Shippori Mincho　本文: Zen Kaku Gothic New
   ========================================================================== */

:root {
  --color-teal-900: #0d3538;
  --color-teal-800: #123f42;
  --color-teal-700: #1a4d50;
  --color-teal-600: #256366;
  --color-coral-500: #f2795c;
  --color-coral-400: #f5926c;
  --color-coral-100: #fde3d7;
  --color-sand-50: #faf6ef;
  --color-sand-100: #f3ebdc;
  --color-cream: #fffdf8;
  --color-ink: #1e2b2b;
  --color-ink-soft: #4a5a5a;
  --color-border: rgba(13, 53, 56, 0.12);

  --font-heading: "Shippori Mincho", serif;
  --font-body: "Zen Kaku Gothic New", sans-serif;

  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 10px 30px rgba(13, 53, 56, 0.1);
  --shadow-card-hover: 0 16px 40px rgba(13, 53, 56, 0.16);
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-sand-50);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.5;
  margin: 0 0 0.6em;
  color: var(--color-teal-900);
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--color-teal-700);
  text-decoration: none;
}

a:hover {
  color: var(--color-coral-500);
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 72px 0;
}

.section--tight {
  padding: 48px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 44px;
}

.section-head .eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--color-coral-500);
  font-weight: 700;
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin-bottom: 8px;
}

.section-head p {
  color: var(--color-ink-soft);
  max-width: 560px;
  margin: 0 auto;
}

/* ---------- 貝殻スパイラルモチーフ ---------- */

.shell-spiral {
  display: inline-block;
  flex-shrink: 0;
}

.divider-shell {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 0 auto 28px;
  color: var(--color-coral-400);
}

.divider-shell::before,
.divider-shell::after {
  content: "";
  height: 1px;
  width: 48px;
  background: var(--color-border);
}

.bg-shell-motif {
  position: relative;
  overflow: hidden;
}

.bg-shell-motif::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240' viewBox='0 0 240 240'%3E%3Cpath d='M120 120c0-38 30-68 68-68s68 30 68 68-30 68-68 68' fill='none' stroke='%23ffffff' stroke-opacity='0.06' stroke-width='6'/%3E%3Cpath d='M120 120c0-24 19-43 43-43s43 19 43 43-19 43-43 43' fill='none' stroke='%23ffffff' stroke-opacity='0.06' stroke-width='6'/%3E%3Cpath d='M120 120c0-11 9-20 20-20s20 9 20 20-9 20-20 20' fill='none' stroke='%23ffffff' stroke-opacity='0.06' stroke-width='6'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 240px 240px;
  opacity: 0.6;
  pointer-events: none;
}

/* ---------- ヘッダー ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-cream);
  border-bottom: 1px solid var(--color-border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  color: var(--color-teal-900);
  font-weight: 700;
}

.site-logo .shell-spiral svg {
  width: 26px;
  height: 26px;
}

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

.site-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-ink);
  position: relative;
  padding: 4px 2px;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--color-coral-500);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
}

/* ---------- ボタン ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  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-coral-500);
  color: #fff;
  box-shadow: 0 8px 20px rgba(242, 121, 92, 0.35);
}

.btn-primary:hover {
  background: var(--color-coral-400);
  color: #fff;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-teal-700);
  color: var(--color-teal-700);
}

.btn-ghost:hover {
  background: var(--color-teal-700);
  color: #fff;
}

/* ---------- ヒーロー（トップ） ---------- */

.hero {
  background: radial-gradient(circle at 15% 20%, var(--color-teal-700), var(--color-teal-900) 65%);
  color: #fff;
  position: relative;
  padding: 96px 0 88px;
}

.hero .wrap {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(242, 121, 92, 0.16);
  border: 1px solid rgba(242, 121, 92, 0.5);
  color: var(--color-coral-100);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 22px;
}

.hero h1 {
  color: #fff;
  font-size: clamp(2.1rem, 4.2vw, 3.1rem);
  margin-bottom: 18px;
}

.hero h1 .accent {
  color: var(--color-coral-400);
}

.hero-lead {
  color: rgba(255, 255, 255, 0.82);
  font-size: 1.02rem;
  max-width: 480px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* ---------- メディアプレースホルダー ---------- */

.media-placeholder {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--color-teal-700), var(--color-teal-900));
  color: rgba(255, 255, 255, 0.75);
  text-align: center;
  padding: 20px;
}

.media-placeholder.is-light {
  background: linear-gradient(135deg, var(--color-sand-100), var(--color-coral-100));
  color: var(--color-teal-700);
}

.media-placeholder .shell-spiral svg {
  width: 40px;
  height: 40px;
  opacity: 0.85;
}

.media-placeholder .ph-label {
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.media-placeholder.ratio-16-9 {
  aspect-ratio: 16 / 9;
}

.media-placeholder.ratio-4-3 {
  aspect-ratio: 4 / 3;
}

.media-placeholder.ratio-1-1 {
  aspect-ratio: 1 / 1;
}

/* ---------- カード ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.game-card {
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
}

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

.game-card .card-media {
  aspect-ratio: 16 / 10;
}

.game-card .card-body {
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-sand-100);
  color: var(--color-teal-700);
}

.tag.tag-new {
  background: var(--color-coral-500);
  color: #fff;
}

.tag.tag-existing {
  background: var(--color-teal-800);
  color: #fff;
}

.tag.tag-art {
  background: var(--color-coral-100);
  color: var(--color-coral-500);
}

.game-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.game-card .card-desc {
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  flex: 1;
  margin-bottom: 16px;
}

.card-link {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--color-teal-700);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-link::after {
  content: "→";
  transition: transform 0.15s ease;
}

.game-card:hover .card-link::after {
  transform: translateX(4px);
}

/* ---------- News ---------- */

.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--color-border);
}

.news-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
}

.news-item time {
  font-family: var(--font-heading);
  color: var(--color-coral-500);
  font-size: 0.95rem;
  padding-top: 3px;
}

.news-item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.news-item p {
  color: var(--color-ink-soft);
  font-size: 0.92rem;
  margin-bottom: 0;
}

.news-excerpt-list .news-item {
  padding: 20px 0;
}

.news-more {
  text-align: center;
  margin-top: 36px;
}

/* ---------- About ---------- */

.about-section {
  background: var(--color-sand-100);
}

.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: center;
}

.about-copy p {
  color: var(--color-ink-soft);
}

.about-copy .lead {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-teal-900);
  margin-bottom: 18px;
}

/* ---------- ゲーム詳細ページ ---------- */

.game-hero {
  background: linear-gradient(160deg, var(--color-teal-800), var(--color-teal-900));
  color: #fff;
  padding: 64px 0 56px;
}

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

.breadcrumb {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.75);
}

.game-hero .catch {
  color: var(--color-coral-400);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  margin-bottom: 10px;
}

.game-hero h1 {
  color: #fff;
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  margin-bottom: 20px;
}

.chip-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.chip {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.22);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.92);
}

.chip strong {
  color: var(--color-coral-400);
  margin-right: 4px;
}

.game-body-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 60px;
}

.game-main h2 {
  font-size: 1.4rem;
  margin-top: 52px;
}

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

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-item {
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  gap: 14px;
}

.feature-item .icon {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--color-coral-100);
  color: var(--color-coral-500);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-item .icon svg {
  width: 20px;
  height: 20px;
}

.feature-item h4 {
  font-size: 0.98rem;
  margin-bottom: 6px;
}

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

.component-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.component-table th,
.component-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}

.component-table th {
  background: var(--color-sand-100);
  color: var(--color-teal-800);
  font-weight: 700;
}

.game-side {
  align-self: start;
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-box {
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.info-box h3 {
  font-size: 1rem;
  margin-bottom: 14px;
}

.info-box dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 14px;
  font-size: 0.88rem;
}

.info-box dt {
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.info-box dd {
  margin: 0;
  color: var(--color-ink);
  font-weight: 500;
}

.info-box .btn {
  width: 100%;
  justify-content: center;
  margin-top: 14px;
}

.credit-box {
  background: var(--color-coral-100);
  border: 1px solid rgba(242, 121, 92, 0.35);
  border-radius: var(--radius-md);
  padding: 22px;
}

.credit-box h3 {
  font-size: 0.95rem;
  color: var(--color-coral-500);
  margin-bottom: 12px;
}

.credit-box dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 12px;
  font-size: 0.88rem;
}

.credit-box dt {
  color: var(--color-ink-soft);
}

.credit-box dd {
  margin: 0;
  font-weight: 600;
  color: var(--color-teal-900);
}

.notice-box {
  background: var(--color-sand-100);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  font-size: 0.84rem;
  color: var(--color-ink-soft);
}

/* ---------- 一覧ページ用 セクション見出し ---------- */

.list-section-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 64px 0 28px;
}

.list-section-title:first-of-type {
  margin-top: 0;
}

.list-section-title h2 {
  margin: 0;
  font-size: 1.35rem;
}

.list-section-title .label-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--color-teal-800);
  color: #fff;
  letter-spacing: 0.04em;
}

.list-section-title.is-art .label-badge {
  background: var(--color-coral-500);
}

.list-intro {
  color: var(--color-ink-soft);
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ---------- ページヒーロー（一覧・ニュース・お問い合わせ） ---------- */

.page-hero {
  background: var(--color-teal-900);
  color: #fff;
  padding: 64px 0;
  text-align: center;
}

.page-hero h1 {
  color: #fff;
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  margin-bottom: 10px;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.75);
  margin: 0;
}

/* ---------- お問い合わせ ---------- */

.contact-panel {
  background: var(--color-cream);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 8px;
  box-shadow: var(--shadow-card);
}

.form-embed {
  aspect-ratio: 4 / 5;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-sand-100);
}

.form-embed iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.form-embed-placeholder {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  color: var(--color-ink-soft);
  padding: 40px;
}

.contact-alt {
  text-align: center;
  margin-top: 28px;
  color: var(--color-ink-soft);
  font-size: 0.9rem;
}

/* ---------- フッター ---------- */

.site-footer {
  background: var(--color-teal-900);
  color: rgba(255, 255, 255, 0.75);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand .site-logo {
  color: #fff;
}

.footer-brand p {
  margin-top: 14px;
  font-size: 0.88rem;
  max-width: 320px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col h4 {
  color: #fff;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.88rem;
}

.footer-col a:hover {
  color: var(--color-coral-400);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.45);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom .sns-links {
  display: flex;
  gap: 16px;
}

/* ---------- レスポンシブ ---------- */

@media (max-width: 960px) {
  .hero .wrap {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

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

  .game-body-grid {
    grid-template-columns: 1fr;
  }

  .game-side {
    position: static;
  }

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

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

@media (max-width: 680px) {
  .site-nav {
    display: none;
  }

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

  .feature-list {
    grid-template-columns: 1fr;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .about-copy .lead {
    font-size: 1.05rem;
  }
}