/* =========================================================
   Fûsen LP — reproduction of the STUDIO site (hand-coded)
   Minimal, airy, pastel. Accent green from the wordmark.
   ========================================================= */

:root {
  --ink: #333333;
  --ink-2: #414141;
  --muted: #8a8a8a;
  --line: #e6e4e3;
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --green: #7cc47f;
  --pink: #f5bfcc;
  --maxw: 1120px;
  --font: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", sans-serif;
  --en: "Poppins", "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg);
  line-height: 2; font-size: 16px; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 28px; }

/* ---------- Hero (white, product photo carousel + wordmark below) ---------- */
.hero { position: relative; background: #fff; min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; padding: 60px 24px; overflow: hidden; }
.hero-photo { position: relative; width: 100%; max-width: 1000px; aspect-ratio: 1000 / 556; margin: 0 auto; }
.hero-slide {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  opacity: 0; transition: opacity 1.4s ease;
}
.hero-slide.active { opacity: 1; }
.hero-wordmark { width: min(240px, 52vw); margin: -18px auto 0; position: relative; z-index: 2; }
.hero-tagline { font-size: clamp(15px, 2.2vw, 20px); font-weight: 700; letter-spacing: .08em; color: var(--ink); line-height: 2; margin: 18px 0 0; }

/* ---------- Sections ---------- */
.section { padding: 110px 0; }
.section.soft { background: var(--bg-soft); }
.eyebrow { font-family: var(--en); font-size: 13px; letter-spacing: .22em; color: var(--green); font-weight: 700; text-transform: uppercase; margin: 0 0 14px; }
.h-lead { font-size: clamp(26px, 4vw, 40px); font-weight: 700; line-height: 1.5; margin: 0; letter-spacing: .02em; }

/* Intro */
.intro { text-align: center; }
.intro .h-lead { margin-bottom: 30px; }
.intro .lead-sub { font-size: clamp(17px, 2.2vw, 21px); font-weight: 700; margin: 0 0 40px; }
.intro p { max-width: 760px; margin: 0 auto 20px; color: var(--ink-2); font-size: 15.5px; }
.band { margin-top: 70px; }
.band img { width: 100%; height: clamp(200px, 34vw, 420px); object-fit: cover; border-radius: 4px; }

/* Feature blocks (alternating) */
.feature { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 64px; margin-bottom: 120px; }
.feature:last-child { margin-bottom: 0; }
.feature .feat-img img { width: 100%; border-radius: 6px; }
.feature.reverse .feat-txt { order: 2; }
.feature.reverse .feat-img { order: 1; }
.feature .eyebrow { margin-bottom: 10px; }
.feature h3 { font-size: clamp(22px, 3vw, 30px); font-weight: 700; margin: 0 0 18px; line-height: 1.5; }
.feature p { margin: 0; color: var(--ink-2); font-size: 15.5px; }
.feature .note { font-size: 12.5px; color: var(--muted); margin-top: 12px; }

/* Color lineup */
.colors { text-align: center; }
.color-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 50px; }
.color-grid figure { margin: 0; }
.color-grid img { width: 100%; border-radius: 6px; background: #fff; }

/* CTA */
.cta { text-align: center; background: var(--bg-soft); }
.cta .h-lead { margin-bottom: 36px; }
.cta-actions { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-weight: 700; font-size: 16px; padding: 17px 44px; border-radius: 999px; transition: transform .15s, opacity .2s, background .2s;
}
.btn-buy { background: var(--ink); color: #fff; }
.btn-buy:hover { transform: translateY(-2px); opacity: .9; }
.btn-mail { background: #fff; color: var(--ink); border: 1.5px solid var(--ink); }
.btn-mail:hover { background: var(--ink); color: #fff; }

/* Spec */
.spec { max-width: 620px; margin: 64px auto 0; text-align: left; border-top: 1px solid var(--line); }
.spec dl { display: grid; grid-template-columns: 180px 1fr; margin: 0; }
.spec dt, .spec dd { padding: 15px 6px; border-bottom: 1px solid var(--line); margin: 0; font-size: 15px; }
.spec dt { font-weight: 700; }
.spec dd { color: var(--ink-2); }
.note-strip { text-align: center; margin-top: 48px; font-size: 15px; font-weight: 700; color: var(--ink-2); letter-spacing: .04em; }
.note-embeds { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 1040px; margin: 26px auto 0; align-items: start; }
.note-embed { width: 100%; border: 0; background: #fff; border-radius: 8px; }
@media (max-width: 900px) { .note-embeds { grid-template-columns: 1fr; max-width: 620px; } }

/* Footer */
.site-footer { padding: 60px 0 70px; border-top: 1px solid var(--line); text-align: center; }
.site-footer .fname { font-weight: 700; margin: 0 0 4px; }
.site-footer a.link { color: var(--ink-2); text-decoration: underline; }
.site-footer .addr { font-size: 13px; color: var(--muted); margin: 6px 0; }
.site-footer .copy { font-size: 12px; color: var(--muted); margin-top: 26px; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 1s ease, transform 1s ease; }
.reveal.in { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 900px) {
  .feature { grid-template-columns: 1fr; gap: 26px; margin-bottom: 80px; }
  .feature.reverse .feat-txt, .feature.reverse .feat-img { order: initial; }
  .color-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
}
@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .spec dl { grid-template-columns: 130px 1fr; }
  .hero { min-height: 540px; }
}