/* BIWA AGING 256 特設LP（試作） 高級和食：明朝・余白・墨と金 */
:root {
  --paper: #f4efe5;
  --paper-2: #ebe4d6;
  --ink: #1f1c18;
  --ink-soft: #4b453d;
  --gold: #8f7236;
  --gold-line: #c9b484;
  --warn: #7a3b2e;
  --maxw: 960px;
  --serif: "Hiragino Mincho ProN", "Hiragino Mincho Pro", "Yu Mincho", "YuMincho", "Noto Serif JP", "Noto Serif CJK JP", "BIZ UDPMincho", "MS PMincho", serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-bottom: 96px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.95;
  letter-spacing: .04em;
  padding-bottom: 76px; /* スマホの固定ボタン分 */
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.center { text-align: center; }

.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff; padding: 10px 14px; z-index: 100; }
.skip:focus { left: 8px; top: 8px; }

/* アンカー移動時、固定ヘッダーに見出しが隠れないようにする */
[id] { scroll-margin-top: 84px; }

/* ヘッダー */
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(244, 239, 229, .96); border-bottom: 1px solid var(--gold-line); backdrop-filter: blur(4px); }
.header-in { display: flex; align-items: center; justify-content: space-between; min-height: 64px; }
.brand img { width: 48px; height: 48px; mix-blend-mode: multiply; }
.nav { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.nav a { display: block; padding: 12px 8px; font-size: 13px; text-decoration: none; letter-spacing: .06em; }
.nav a:hover { color: var(--gold); }

/* ヒーロー */
.hero { padding: 44px 0 52px; }
.nb { display: inline-block; }
.eyebrow { margin: 0 0 14px; font-size: 12px; letter-spacing: .32em; color: var(--gold); }
h1 { margin: 0 0 20px; font-size: 27px; line-height: 1.6; font-weight: 600; letter-spacing: .06em; }
.lead { margin: 0 0 28px; color: var(--ink-soft); }
.hero-photos { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 0 0 28px; }
.hero-photos figure { margin: 0; }
.hero-photos img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; border: 1px solid var(--gold-line); }
.hero-photos figcaption { margin-top: 8px; font-size: 14px; line-height: 1.6; }
.cap-k { display: block; font-size: 20px; font-weight: 600; }
.hero-photos small { display: block; color: var(--ink-soft); font-size: 11px; }
.hero-cta { display: flex; flex-direction: column; gap: 10px; align-items: stretch; }
.photo-note { margin: 0 0 4px; font-size: 13px; color: var(--ink-soft); line-height: 1.7; }
.btn-note { margin: -4px 0 4px; font-size: 12px; color: var(--ink-soft); text-align: center; line-height: 1.6; }
.note-in { margin: 10px 0 0 !important; font-size: 13px !important; color: var(--ink-soft); }
.link-quiet { text-align: center; font-size: 14px; padding: 10px 0; }
.fine { font-size: 12px; line-height: 1.8; color: var(--ink-soft); margin: 16px 0 0; }

/* ボタン */
.btn {
  display: inline-block; text-align: center; text-decoration: none;
  min-height: 48px; padding: 12px 22px; line-height: 1.5;
  border: 1px solid var(--ink); font-family: var(--serif); font-size: 15px; letter-spacing: .06em;
  cursor: pointer; background: transparent; color: var(--ink);
}
.btn:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }
.btn-primary { background: var(--ink); color: #f8f3e8; border-color: var(--ink); }
.btn-primary:hover { background: #3a342c; }
.btn-line:hover { background: var(--ink); color: #f8f3e8; }
.btn-ghost { border-color: var(--gold-line); }
.btn-text { border: 0; border-bottom: 1px solid var(--gold); min-height: 44px; padding: 10px 4px; margin-right: 18px; }
.btn-block { display: block; width: 100%; }

/* セクション */
.sec { padding: 60px 0; }
.sec-alt { background: var(--paper-2); }
h2 { margin: 0 0 18px; font-size: 24px; line-height: 1.6; font-weight: 600; letter-spacing: .08em; padding-bottom: 14px; position: relative; }
h2::after { content: ""; display: block; width: 44px; height: 1px; background: var(--gold); margin-top: 14px; }
.center h2::after { margin-left: auto; margin-right: auto; }
h3 { margin: 0 0 8px; font-size: 18px; line-height: 1.6; font-weight: 600; }
h4 { margin: 0 0 4px; font-size: 16px; line-height: 1.6; font-weight: 600; }
.sec-lead { margin: 0 0 28px; color: var(--ink-soft); }
.note { font-size: 13px; color: var(--ink-soft); margin: 22px 0 0; }

/* おす・めす */
.two { display: grid; gap: 16px; }
.vs { border: 1px solid var(--gold-line); background: #faf6ed; padding: 24px 22px; }
.vs h3 { font-size: 24px; margin-bottom: 10px; }
.sub { display: inline-block; margin-left: 12px; font-size: 14px; color: var(--gold); letter-spacing: .1em; }
.who { font-size: 14px; color: var(--ink-soft); }
.vs .btn { margin-top: 8px; width: 100%; }

/* 晩酌の進め方 */
.steps { list-style: none; counter-reset: s; padding: 0; margin: 0 0 24px; display: grid; gap: 14px; }
.steps li { counter-increment: s; position: relative; padding: 18px 18px 18px 62px; background: #faf6ed; border: 1px solid var(--gold-line); }
.steps li::before { content: counter(s); position: absolute; left: 18px; top: 16px; width: 32px; height: 32px; line-height: 30px; text-align: center; border: 1px solid var(--gold); color: var(--gold); font-size: 16px; border-radius: 50%; }
.steps h3 { font-size: 17px; margin-bottom: 4px; }
.steps p { margin: 0; font-size: 15px; }
.box { margin: 14px 0 0; padding: 20px; border-left: 3px solid var(--gold); background: #faf6ed; }
.box h3 { font-size: 16px; }
.box p { margin: 0; font-size: 15px; }
.box-warn { border-left-color: var(--warn); }
.plain { margin: 0; padding-left: 1.2em; font-size: 15px; }

/* 商品カード */
.grp { margin: 36px 0 12px; font-size: 17px; padding-bottom: 6px; border-bottom: 1px solid var(--gold-line); }
.cards { display: grid; gap: 14px; }
.pcard { border: 1px solid var(--gold-line); background: #faf6ed; padding: 20px; display: flex; flex-direction: column; gap: 4px; }
.pcard .btn { margin-top: 10px; }
.tag { align-self: flex-start; margin: 0 0 6px; font-size: 12px; letter-spacing: .12em; color: #f8f3e8; background: var(--gold); padding: 2px 10px; }
.pnote { margin: 0; font-size: 13px; color: var(--ink-soft); }
.price { margin: 4px 0 0; font-size: 24px; letter-spacing: .04em; }
.yen { font-size: 15px; margin-right: 2px; }
.small-pick { margin-top: 36px; padding: 20px; border: 1px dashed var(--gold-line); }
.small-pick p { margin: 0 0 6px; font-size: 14px; }
.small-links { margin-top: 6px !important; }

/* お届け・保存 */
.spec { margin-top: 36px; }
.spec dl { margin: 0; border-top: 1px solid var(--gold-line); }
.spec dt { padding: 12px 0 0; font-weight: 600; font-size: 14px; color: var(--gold); }
.spec dd { margin: 0; padding: 2px 0 12px; border-bottom: 1px solid var(--gold-line); font-size: 15px; line-height: 1.8; }

/* FAQ */
.faq details { border-bottom: 1px solid var(--gold-line); }
.faq summary { cursor: pointer; padding: 16px 28px 16px 0; font-size: 16px; line-height: 1.7; list-style: none; position: relative; min-height: 48px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; position: absolute; right: 2px; top: 14px; color: var(--gold); }
.faq details[open] summary::after { content: "－"; }
.faq p { margin: 0; padding: 0 0 16px; font-size: 15px; color: var(--ink-soft); }

.sec-final { background: var(--ink); color: #f1ebdd; }
.sec-final .sec-lead { color: #d8cfbb; }
.sec-final h2::after { background: var(--gold-line); }
.sec-final .btn-primary { background: #f4efe5; color: var(--ink); border-color: #f4efe5; }
.sec-final .btn-ghost { color: #f1ebdd; border-color: #8b7d5c; }
.sec-final p { margin: 0 0 14px; }

/* フッター */
.site-footer { padding: 36px 0 28px; text-align: center; }
.foot-logo { margin: 0 auto 8px; mix-blend-mode: multiply; }
.foot-name { margin: 0; font-size: 15px; letter-spacing: .24em; }
.foot-sub { margin: 0 0 14px; font-size: 13px; color: var(--ink-soft); }
.foot-links { list-style: none; margin: 0 0 14px; padding: 0; }
.foot-links li { margin: 0; }
.foot-a { display: inline-block; padding: 12px 8px; font-size: 14px; }

/* 固定ボタン（スマホ） */
.sticky { position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; padding: 10px 14px calc(10px + env(safe-area-inset-bottom)); background: rgba(244, 239, 229, .97); border-top: 1px solid var(--gold-line); }

@media (max-width: 420px) {
  .wrap { padding: 0 14px; }
  .header-in { gap: 4px; }
  .brand img { width: 40px; height: 40px; }
  .nav { gap: 0; }
  .nav a { padding: 12px 5px; font-size: 12px; letter-spacing: .02em; }
  h1 { font-size: 24px; }
  .vs { padding: 20px 16px; }
}

@media (min-width: 760px) {
  html { scroll-padding-bottom: 0; }
  body { font-size: 17px; padding-bottom: 0; }
  .wrap { padding: 0 32px; }
  h1 { font-size: 38px; }
  h2 { font-size: 28px; }
  .nav a { padding: 12px 14px; font-size: 14px; }
  .hero { padding: 72px 0 80px; }
  .hero-in { display: grid; grid-template-columns: 1.05fr 1fr; grid-template-areas: "text photos" "cta photos"; column-gap: 48px; align-items: start; }
  .hero-in > .hero-text:first-child { grid-area: text; }
  .hero-photos { grid-area: photos; gap: 14px; margin: 0; }
  .hero-cta { grid-area: cta; flex-direction: column; align-items: flex-start; gap: 10px; }
  .hero-cta .btn { width: auto; }
  .btn-note { text-align: left; }
  .hero-in > .fine { grid-column: 1; grid-row: 3; }
  .sec { padding: 88px 0; }
  .two { grid-template-columns: 1fr 1fr; gap: 24px; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .steps li { padding: 62px 18px 18px; }
  .steps li::before { top: 18px; left: 18px; }
  .cards { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .spec dl { display: grid; grid-template-columns: 160px 1fr; }
  .spec dt, .spec dd { border-bottom: 1px solid var(--gold-line); padding: 14px 0; }
  .spec dt { padding-top: 14px; }
  .sticky { display: none; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print { .sticky, .site-header { display: none; } body { padding: 0; } }