/* ==========================================================================
   Tatsu｜静岡デートグルメ
   ========================================================================== */

:root {
  --ink: #1c1a17;          /* 墨色：メインの暗色 */
  --ink-soft: #3a3632;
  --ivory: #f6f1e9;        /* 生成り：背景 */
  --paper: #fbf8f3;
  --gold: #b08d57;         /* くすみゴールド：アクセント */
  --gold-soft: #d8c3a0;
  --wine: #6e2f2f;         /* ワイン：差し色 */
  --line: rgba(28, 26, 23, 0.12);
  --muted: #7a726a;

  --font-serif: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  --font-en: "Cormorant Garamond", "Times New Roman", serif;

  --container: 1120px;
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p, ul, dl, dd { margin: 0; padding: 0; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  width: min(100% - 48px, var(--container));
  margin-inline: auto;
}

.sp-only { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 180px;
  padding: 14px 32px;
  font-size: 13px;
  letter-spacing: 0.12em;
  border: 1px solid transparent;
  transition: background 0.4s var(--ease), color 0.4s var(--ease), border-color 0.4s var(--ease);
}
.btn--light { background: var(--ivory); color: var(--ink); }
.btn--light:hover { background: var(--gold-soft); }
.btn--ghost { border-color: rgba(246, 241, 233, 0.6); color: var(--ivory); }
.btn--ghost:hover { background: rgba(246, 241, 233, 0.12); }
.btn--dark { background: var(--ink); color: var(--ivory); }
.btn--dark:hover { background: var(--wine); }

/* ---------- Header ---------- */
.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  color: var(--ivory);
  transition: background 0.4s var(--ease), color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.header.is-scrolled {
  background: rgba(251, 248, 243, 0.94);
  backdrop-filter: blur(8px);
  color: var(--ink);
  box-shadow: 0 1px 0 var(--line);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: min(100% - 48px, 1280px);
  margin-inline: auto;
}

.logo { display: flex; align-items: baseline; gap: 12px; }
.logo__en { font-family: var(--font-en); font-size: 28px; font-style: italic; letter-spacing: 0.02em; }
.logo__ja { font-family: var(--font-serif); font-size: 12px; letter-spacing: 0.2em; }

.nav__list { display: flex; align-items: center; gap: 36px; }
.nav__list a {
  font-family: var(--font-en);
  font-size: 16px;
  letter-spacing: 0.12em;
  position: relative;
}
.nav__list a:not(.nav__cta)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease);
}
.nav__list a:not(.nav__cta):hover::after { transform: scaleX(1); transform-origin: left; }
.nav__cta { padding: 6px 20px; border: 1px solid currentColor; }

.nav-toggle {
  display: none;
  position: relative;
  width: 40px; height: 40px;
  background: none; border: 0; cursor: pointer;
  color: inherit;
}
.nav-toggle span {
  position: absolute;
  left: 8px; width: 24px; height: 1px;
  background: currentColor;
  transition: transform 0.4s var(--ease), top 0.4s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 24px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 20px; transform: rotate(30deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { top: 20px; transform: rotate(-30deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: var(--ivory);
  text-align: center;
}
.hero__bg {
  position: absolute;
  inset: 0;
  /* 写真が入るまでの仮背景。images/hero.jpg を置いたら下の url 行のコメントを外す */
  background:
    linear-gradient(180deg, rgba(20, 18, 16, 0.45) 0%, rgba(20, 18, 16, 0.75) 100%),
    /* url("../images/hero.jpg") center / cover no-repeat, */
    radial-gradient(ellipse at 30% 30%, #5b3a2a 0%, transparent 60%),
    radial-gradient(ellipse at 75% 70%, #2f3b33 0%, transparent 55%),
    #1c1a17;
  transform: scale(1.06);
  animation: heroZoom 12s var(--ease) forwards;
}
@keyframes heroZoom { to { transform: scale(1); } }

.hero__inner { position: relative; padding: 0 24px; }
.hero__label {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 18px;
  letter-spacing: 0.2em;
  color: var(--gold-soft);
  margin-bottom: 24px;
}
.hero__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.6;
  letter-spacing: 0.12em;
}
.hero__lead {
  margin-top: 28px;
  font-family: var(--font-serif);
  font-size: clamp(14px, 1.6vw, 17px);
  line-height: 2.2;
  letter-spacing: 0.14em;
  opacity: 0.9;
}
.hero__sns {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 48px;
}
.hero__scroll {
  position: absolute;
  left: 50%; bottom: 28px;
  transform: translateX(-50%);
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 0.24em;
  padding-bottom: 56px;
}
.hero__scroll::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 0;
  width: 1px; height: 44px;
  background: linear-gradient(var(--ivory), transparent);
  animation: scrollLine 2.4s var(--ease) infinite;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- Section common ---------- */
.section { padding: 128px 0; }
.section__head { text-align: center; margin-bottom: 72px; }
.section__en {
  font-family: var(--font-en);
  font-style: italic;
  font-size: 18px;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 12px;
}
.section__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.7;
  letter-spacing: 0.12em;
}
.section__desc { margin-top: 20px; color: var(--muted); font-size: 14px; }
.section__head--light .section__desc { color: rgba(246, 241, 233, 0.7); }

/* ---------- Concept ---------- */
.concept { background: var(--paper); }
.concept__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}
.concept__item { padding-top: 32px; border-top: 1px solid var(--line); }
.concept__num { font-family: var(--font-en); font-size: 40px; color: var(--gold); line-height: 1; }
.concept__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 20px;
  letter-spacing: 0.1em;
  margin: 20px 0 16px;
}
.concept__item p { color: var(--ink-soft); font-size: 14px; }

/* ---------- Pick Up ---------- */
.pickup { background: var(--ivory); }
.pickup__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.card { background: var(--paper); transition: transform 0.6s var(--ease), box-shadow 0.6s var(--ease); }
.card:hover { transform: translateY(-6px); box-shadow: 0 24px 48px -24px rgba(28, 26, 23, 0.35); }
.card__img {
  aspect-ratio: 4 / 5;
  background-size: cover;
  background-position: center;
}
/* 仮画像（写真に差し替える場合は background-image: url(...) に置き換え） */
.card__img--1 { background-image: linear-gradient(160deg, #6e4a36, #2a201b); }
.card__img--2 { background-image: linear-gradient(160deg, #6f7d62, #2b332c); }
.card__img--3 { background-image: linear-gradient(160deg, #8a7056, #3a2f27); }

.card__body { padding: 28px 28px 32px; }
.card__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.card__tags span {
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 2px 10px;
  border: 1px solid var(--gold-soft);
  color: var(--gold);
}
.card__title { font-family: var(--font-serif); font-weight: 500; font-size: 19px; letter-spacing: 0.08em; }
.card__area { font-size: 12px; color: var(--muted); margin-top: 4px; }
.card__text { font-size: 13px; color: var(--ink-soft); margin-top: 16px; line-height: 2; }
.card__link {
  display: inline-block;
  margin-top: 20px;
  font-family: var(--font-en);
  font-size: 15px;
  letter-spacing: 0.12em;
  border-bottom: 1px solid var(--ink);
}
.card__link::after { content: " →"; }
.pickup__more { text-align: center; margin-top: 64px; }

/* ---------- Area ---------- */
.area { background: var(--paper); }
.area__list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.area__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 40px 16px;
  font-family: var(--font-serif);
  font-size: 18px;
  letter-spacing: 0.14em;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 0.4s var(--ease);
}
.area__item:hover { background: var(--ivory); }
.area__en { font-family: var(--font-en); font-style: italic; font-size: 14px; color: var(--gold); letter-spacing: 0.12em; }

/* ---------- About ---------- */
.about { background: var(--ivory); }
.about__inner {
  display: grid;
  grid-template-columns: 5fr 6fr;
  gap: 80px;
  align-items: center;
}
.about__img {
  aspect-ratio: 4 / 5;
  /* TODO: background: url("../images/profile.jpg") center / cover; */
  background: linear-gradient(160deg, #a58c6f, #4a3c31);
}
.about__body .section__title { font-family: var(--font-en); font-style: italic; font-size: 48px; letter-spacing: 0.04em; }
.about__role { font-size: 13px; color: var(--muted); letter-spacing: 0.14em; margin: 4px 0 28px; }
.about__body > p:not([class]) { color: var(--ink-soft); }
.about__stats {
  display: flex;
  gap: 48px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.about__stats dt { font-family: var(--font-en); font-size: 15px; letter-spacing: 0.14em; color: var(--muted); }
.about__stats dd { font-family: var(--font-en); font-size: 44px; line-height: 1.2; }
.about__stats small { font-size: 24px; color: var(--gold); }
.about__note { font-size: 11px; color: var(--muted); margin-top: 12px; }

/* ---------- Contact ---------- */
.contact { background: var(--ink); color: var(--ivory); }
.contact .section__en { color: var(--gold-soft); }
.contact__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 880px;
  margin-inline: auto;
}
.contact__item {
  padding: 40px;
  border: 1px solid rgba(246, 241, 233, 0.16);
}
.contact__item h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 19px;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}
.contact__item p { font-size: 14px; color: rgba(246, 241, 233, 0.75); }
.contact__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 64px;
}

/* ---------- Footer ---------- */
.footer { background: #141210; color: rgba(246, 241, 233, 0.8); padding: 56px 0 40px; }
.footer__inner { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.footer__sns { display: flex; gap: 32px; font-family: var(--font-en); font-size: 15px; letter-spacing: 0.14em; }
.footer__sns a:hover { color: var(--gold-soft); }
.footer__copy { font-size: 11px; letter-spacing: 0.1em; opacity: 0.6; }

/* ---------- Fade-in ---------- */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.fade-in.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-in { opacity: 1; transform: none; transition: none; }
  .hero__bg { animation: none; transform: none; }
  .hero__scroll::after { animation: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 960px) {
  .concept__grid,
  .pickup__grid { grid-template-columns: 1fr 1fr; }
  .about__inner { gap: 48px; }
}

@media (max-width: 768px) {
  :root { --header-h: 60px; }
  body { font-size: 14px; }
  .sp-only { display: inline; }

  .logo__en { font-size: 24px; }
  .logo__ja { font-size: 10px; }

  .nav-toggle { display: block; z-index: 2; }
  .nav {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    background: var(--ink);
    color: var(--ivory);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s var(--ease), visibility 0.5s var(--ease);
  }
  .nav.is-open { opacity: 1; visibility: visible; }
  .nav__list { flex-direction: column; gap: 32px; }
  .nav__list a { font-size: 24px; }
  body.nav-open { overflow: hidden; }
  body.nav-open .header { color: var(--ivory); background: transparent; box-shadow: none; }

  .section { padding: 88px 0; }
  .section__head { margin-bottom: 48px; }

  .concept__grid,
  .pickup__grid,
  .contact__grid { grid-template-columns: 1fr; }
  .concept__grid { gap: 40px; }

  .area__list { grid-template-columns: 1fr 1fr; }
  .area__item { padding: 28px 12px; font-size: 16px; }

  .about__inner { grid-template-columns: 1fr; }
  .about__img { max-width: 360px; width: 100%; margin-inline: auto; }
  .about__body { text-align: center; }
  .about__stats { justify-content: center; }

  .contact__item { padding: 28px; }
  .btn { width: 100%; max-width: 320px; }
}