:root {
  --deep: #080503;
  --night: #150C0A;
  --surface: #1F1310;
  --oki: #E07052;
  --highlight: #F5A186;
  --text: rgba(242, 229, 222, .87);
  --text2: rgba(242, 229, 222, .60);
  --text3: rgba(242, 229, 222, .48);
  --latin: "Quicksand", sans-serif;
  --jp: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--deep);
  color: var(--text);
  font-family: var(--jp);
  line-height: 2;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
}
.latin { font-family: var(--latin); }
a { color: inherit; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--oki); outline-offset: 3px; border-radius: 4px;
}
img { max-width: 100%; height: auto; display: block; }

/* ---------- 和紙の粒子(アプリの GrainOverlay の移植) ---------- */
body::after {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 3;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: .035; mix-blend-mode: screen;
}

/* ---------- ヘッダー ---------- */
header {
  position: absolute; top: 0; left: 0; right: 0; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  padding: 26px clamp(20px, 5vw, 56px);
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.brand span {
  font-family: var(--latin); font-weight: 600; font-size: 1.05rem; letter-spacing: .12em;
}
header nav { display: flex; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
header nav a {
  font-size: .82rem; color: var(--text2); text-decoration: none;
  margin-left: 10px; letter-spacing: .05em;
  display: inline-block; padding: 12px;
}
header nav a:hover { color: var(--oki); }
/* 言語切替 */
.langs { display: inline-flex; align-items: center; margin-left: 6px; padding-left: 10px; border-left: 1px solid rgba(242,229,222,.14); }
.langs a { padding: 12px 5px; font-size: .78rem; color: var(--text3); }
.langs a[aria-current="true"] { color: var(--oki); }

/* ---------- ヒーロー: 灯の地平線のそばに ---------- */
.hero {
  position: relative; overflow: hidden;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  align-items: center;
  gap: clamp(24px, 5vw, 64px);
  padding: clamp(96px, 14vh, 150px) clamp(20px, 6vw, 72px) clamp(64px, 10vh, 120px);
  max-width: 1180px; margin: 0 auto;
}
.hero::before {
  content: ""; position: absolute; left: 50%; bottom: -42vh;
  width: 160vw; height: 80vh; transform: translateX(-50%);
  background: radial-gradient(
    55% 62% at 50% 100%,
    rgba(245, 161, 134, .34),
    rgba(224, 112, 82, .20) 34%,
    rgba(181, 72, 55, .10) 58%,
    transparent 78%
  );
  animation: breathe 11s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes breathe {
  from { opacity: .72; }
  to   { opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .hero::before { animation: none; }
}
.hero-copy { position: relative; z-index: 1; }
.hero-copy .en-mark {
  font-family: var(--latin); font-weight: 500; color: var(--oki);
  font-size: .85rem; letter-spacing: .28em; text-transform: uppercase;
}
h1 {
  margin-top: 18px;
  font-size: clamp(2rem, 5.2vw, 3.3rem);
  font-weight: 500; line-height: 1.5; letter-spacing: .06em;
}
.hero-copy .lead {
  margin-top: 22px; color: var(--text2);
  font-size: clamp(.95rem, 1.6vw, 1.05rem); max-width: 30em;
}
.store-cta {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 40px; padding: 13px 30px;
  border: 1px solid rgba(224, 112, 82, .45); border-radius: 999px;
  color: var(--text); text-decoration: none;
  font-family: var(--latin); font-size: .92rem; letter-spacing: .08em;
  cursor: default;
}
.store-cta .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--oki); }
.store-cta small { color: var(--text3); font-size: .78rem; letter-spacing: .05em; }

/* 電話モック */
.hero-phone { position: relative; z-index: 1; justify-self: center; }
.device {
  display: block;
  filter:
    drop-shadow(0 32px 64px rgba(0, 0, 0, .55))
    drop-shadow(0 0 110px rgba(224, 112, 82, .13));
}
.hero-phone .device { height: clamp(452px, 62vh, 588px); width: auto; }

/* ---------- セクション共通 ---------- */
section { position: relative; }
.inner { max-width: 1180px; margin: 0 auto; padding: 0 clamp(20px, 6vw, 72px); }
.section-mark {
  font-family: var(--latin); font-weight: 500; color: var(--oki);
  font-size: .8rem; letter-spacing: .26em; text-transform: uppercase;
}
h2 {
  margin-top: 14px; font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 500; letter-spacing: .05em; line-height: 1.6;
}

/* ---------- 特徴 ---------- */
.features { padding: clamp(72px, 12vh, 130px) 0 0; }
.feature-grid {
  margin-top: clamp(36px, 6vh, 60px);
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2.4vw, 28px);
}
.feature {
  background: rgba(31, 19, 16, .78);
  border: 1px solid rgba(242, 229, 222, .07);
  border-radius: 20px;
  padding: clamp(22px, 2.6vw, 30px);
}
.feature-head { display: flex; align-items: center; gap: 12px; }
.feature-head svg { width: 24px; height: 24px; color: var(--oki); flex: none; }
.feature h3 { font-size: 1.08rem; font-weight: 600; letter-spacing: .04em; }
.feature p { margin-top: 14px; color: var(--text2); font-size: .9rem; line-height: 1.9; }
.feature-tags {
  margin-top: 18px; padding-top: 16px;
  border-top: 1px solid rgba(242, 229, 222, .08);
  display: flex; flex-wrap: wrap; gap: 6px;
}
.feature-tags span {
  font-size: .76rem; color: var(--text2);
  border: 1px solid rgba(242, 229, 222, .16); border-radius: 999px;
  padding: 3px 12px; letter-spacing: .03em; line-height: 1.8;
}

/* ---------- 画面 ---------- */
.screens { padding: clamp(80px, 13vh, 140px) 0; }
.screen-row {
  margin-top: clamp(36px, 6vh, 60px);
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(18px, 3vw, 40px);
  align-items: start;
}
.screen { text-align: center; }
.screen .device { width: 100%; max-width: 300px; height: auto; margin: 0 auto; }
.screen figcaption { margin-top: 16px; color: var(--text2); font-size: .86rem; letter-spacing: .04em; }

/* ---------- フッター ---------- */
footer {
  position: relative; overflow: hidden;
  padding: clamp(56px, 9vh, 90px) 0 44px;
  text-align: center;
  border-top: 1px solid rgba(242, 229, 222, .06);
}
footer::before {
  content: ""; position: absolute; left: 50%; bottom: -30vh;
  width: 140vw; height: 46vh; transform: translateX(-50%);
  background: radial-gradient(
    52% 60% at 50% 100%,
    rgba(224, 112, 82, .16),
    rgba(181, 72, 55, .07) 50%,
    transparent 76%
  );
  pointer-events: none;
}
footer .wordmark { font-family: var(--latin); font-weight: 600; letter-spacing: .16em; font-size: 1rem; }
footer nav { margin-top: 18px; }
footer nav a {
  color: var(--text2); text-decoration: none; margin: 0 14px;
  font-size: .84rem; letter-spacing: .04em;
}
footer nav a:hover { color: var(--oki); }
footer .legal { margin-top: 22px; color: var(--text3); font-size: .76rem; letter-spacing: .06em; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 118px;
    min-height: auto;
  }
  .hero-copy .lead { margin-left: auto; margin-right: auto; }
  .hero-phone { margin-top: 8px; }
  .feature-grid { grid-template-columns: 1fr; }
  .screen-row { grid-template-columns: 1fr; gap: 44px; }
  .screen .device { width: min(64vw, 260px); }
  header nav a { margin-left: 8px; font-size: .78rem; }
}