/* ============================================================
   Natural Dahlia — デザイン
   色を変えたいときは、下の :root の値だけを変えてください。
   ============================================================ */
:root {
  --soil: #3b2a1e;        /* 文字・濃い茶 */
  --bark: #6b5240;        /* 本文の茶 */
  --leaf: #5b6b3a;        /* 葉の緑 */
  --bloom: #b8456a;       /* ダリアのピンク（アクセント） */
  --paper: #fbf7f0;       /* 背景 */
  --soft: #f2ebdf;        /* 淡い背景 */
  --line: #e2d7c5;        /* 区切り線 */
  --wrap: 1080px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  background: var(--paper);
  color: var(--bark);
  font-family: "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 2;
  letter-spacing: .03em;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--bloom); }
a:hover { opacity: .8; }

.wrap { width: min(var(--wrap), 100% - 32px); margin: 0 auto; }
.narrow { max-width: 760px; margin-left: auto; margin-right: auto; }
.center { text-align: center; }
.small { font-size: .85rem; color: #8a7663; }

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251,247,240,.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo img { height: 34px; width: auto; }
.site-nav { display: flex; gap: 28px; }
.site-nav a { color: var(--soil); text-decoration: none; font-size: .9rem; }
.site-nav a:hover { color: var(--bloom); }
.menu-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; }
.menu-toggle span { display: block; height: 2px; background: var(--soil); margin: 7px 8px; }

/* ---------- トップ ---------- */
.hero { position: relative; height: min(78vh, 680px); overflow: hidden; background: var(--soil); }
.hero-photos img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transition: opacity 1.6s ease;
}
.hero-photos img.on { opacity: 1; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(30,20,12,.78) 0%, rgba(30,20,12,.45) 45%, rgba(30,20,12,0) 80%); }
.hero-text { text-shadow: 0 1px 8px rgba(0,0,0,.45); }
.hero-text { position: absolute; left: 0; right: 0; bottom: 56px; z-index: 2; color: #fff; }
.hero-sub { font-size: .95rem; letter-spacing: .15em; margin-bottom: 8px; }
.hero h1 { font-family: "Zen Old Mincho", serif; font-weight: 700; font-size: clamp(1.7rem, 4.2vw, 2.8rem); line-height: 1.5; }

/* ---------- セクション ---------- */
.section { padding: 96px 0; }
.section.soft { background: var(--soft); }
.section p + p { margin-top: 1.2em; }
.sec-title {
  font-family: "Zen Old Mincho", serif; color: var(--soil);
  font-size: clamp(1.4rem, 3vw, 1.9rem); line-height: 1.6;
  text-align: center; margin-bottom: 48px;
}
.sec-title span { display: block; font-size: .95rem; color: var(--leaf); letter-spacing: .1em; margin-bottom: 4px; }
.sec-title::after { content: "✿"; display: block; color: var(--bloom); font-size: 1rem; margin-top: 12px; }

.intro p { font-size: 1.05rem; }
.note-flower { text-align: center; color: var(--bloom); margin-top: 2em !important; }
.quote { font-family: "Zen Old Mincho", serif; font-size: 1.2rem; color: var(--soil); text-align: center; margin: 1.6em 0 !important; }

figure { margin: 40px 0; }
figure img { border-radius: 6px; width: 100%; }
figcaption { font-size: .8rem; color: #8a7663; margin-top: 8px; text-align: right; }

.two-photos { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 760px; margin: 0 auto 40px; }
.two-photos img { border-radius: 6px; aspect-ratio: 3/4; object-fit: cover; width: 100%; }

/* 栽培環境 */
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-bottom: 72px; }
.feature:last-child { margin-bottom: 0; }
.feature img { border-radius: 6px; aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.feature.reverse img { order: 2; }
.feature h3 { font-family: "Zen Old Mincho", serif; color: var(--soil); font-size: 1.3rem; margin-bottom: 12px; padding-left: 14px; border-left: 3px solid var(--leaf); line-height: 1.5; }

/* お客様の声 */
.voices { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.voice { background: #fff; border-radius: 8px; padding: 32px; }
.voice h3 { color: var(--leaf); font-size: 1rem; margin-bottom: 12px; }
.voice li { list-style: none; padding-left: 1.4em; position: relative; margin-bottom: 8px; line-height: 1.8; }
.voice li::before { content: "“"; position: absolute; left: 0; color: var(--bloom); font-size: 1.4rem; line-height: 1.2; }

/* 購入方法 */
.season { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 12px; }
.season > div { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 16px 28px; text-align: center; }
.season-label { display: block; font-size: .85rem; color: var(--leaf); }
.season-month { font-family: "Zen Old Mincho", serif; font-size: 1.4rem; color: var(--soil); }
.shops { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.shop { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 28px; font-size: .92rem; line-height: 1.9; }
.shop h3 { font-family: "Zen Old Mincho", serif; color: var(--soil); font-size: 1.1rem; margin-bottom: 12px; line-height: 1.5; }
.shop h3 small { display: block; font-size: .8rem; color: #8a7663; font-family: "Noto Sans JP", sans-serif; }
.shop p + p { margin-top: .8em; }
.shop-banner { margin: 16px 0; }
.shop-logo { max-width: 200px; margin-top: 16px; }

/* ボタン */
.btn { display: inline-block; padding: 12px 28px; border: 1.5px solid var(--soil); border-radius: 999px; color: var(--soil); text-decoration: none; font-size: .9rem; transition: .2s; }
.btn:hover { background: var(--soil); color: #fff; opacity: 1; }
.btn-accent { background: var(--bloom); border-color: var(--bloom); color: #fff; }
.btn-accent:hover { background: var(--soil); border-color: var(--soil); }
.btn-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 32px 0 16px; }

.caution { background: #fff; border-radius: 8px; padding: 28px 32px; margin-top: 48px; font-size: .92rem; }
.caution h3 { font-size: 1rem; color: var(--soil); margin-bottom: 8px; }
.caution li { margin-left: 1.2em; line-height: 1.9; }

.producer-name { font-family: "Zen Old Mincho", serif; font-size: 1.2rem; color: var(--soil); }

/* リンク */
.links { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.links a { display: block; background: #fff; border-radius: 8px; padding: 18px 22px; text-decoration: none; color: var(--bark); border: 1px solid transparent; transition: .2s; height: 100%; }
.links a:hover { border-color: var(--bloom); opacity: 1; }
.links strong { display: block; color: var(--soil); }
.links span { font-size: .85rem; line-height: 1.7; display: block; }

/* フッター */
.site-footer { background: var(--soil); color: #e9dfcf; text-align: center; padding: 64px 0 40px; font-size: .9rem; }
.site-footer a { color: #f4c9d6; }
.footer-logo { height: 40px; width: auto; margin: 0 auto 20px; background: var(--paper); padding: 8px 14px; border-radius: 6px; }
.copy { margin-top: 24px; font-size: .8rem; opacity: .7; }

.to-top { position: fixed; right: 16px; bottom: 16px; width: 44px; height: 44px; border-radius: 50%; background: var(--bloom); color: #fff; text-decoration: none; display: grid; place-items: center; box-shadow: 0 4px 12px rgba(0,0,0,.15); }


/* ---------- 初心者向け（ブラッシュアップで追加） ---------- */
.nav-em { color: var(--bloom) !important; font-weight: 500; }
.hero-lead { margin-top: 12px; font-size: 1rem; line-height: 1.9; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.btn-light { background: rgba(255,255,255,.92); border-color: #fff; color: var(--soil); }
.btn-light:hover { background: #fff; color: var(--bloom); }

.beginner { background: linear-gradient(180deg, #fff 0%, var(--paper) 100%); }
.lead { font-size: 1.1rem; margin-top: -24px; margin-bottom: 48px; }
.reasons { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.reason { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 32px 28px; }
.reason-num { font-family: "Zen Old Mincho", serif; color: var(--bloom); font-size: 1.6rem; line-height: 1; margin-bottom: 12px; }
.reason h3 { font-family: "Zen Old Mincho", serif; color: var(--soil); font-size: 1.15rem; line-height: 1.5; margin-bottom: 10px; }
.reason p:last-child { font-size: .92rem; line-height: 1.9; }

.sub-title { font-family: "Zen Old Mincho", serif; color: var(--soil); text-align: center; font-size: 1.3rem; margin: 72px 0 32px; }
.steps { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: s; }
.steps li { position: relative; background: var(--soft); border-radius: 10px; padding: 24px 20px; }
.steps li:not(:last-child)::after { content: "→"; position: absolute; right: -14px; top: 50%; transform: translateY(-50%); color: var(--leaf); z-index: 1; }
.step-when { display: inline-block; background: var(--leaf); color: #fff; font-size: .8rem; padding: 2px 12px; border-radius: 999px; margin-bottom: 8px; }
.steps h4 { color: var(--soil); font-size: 1.05rem; margin-bottom: 6px; }
.steps li p:last-child { font-size: .88rem; line-height: 1.8; }
.beginner .small { margin-top: 20px; }

.book { display: block; margin-top: 32px; background: var(--soil); color: #f3eadc; border-radius: 10px; padding: 28px 32px; text-decoration: none; }
.book:hover { opacity: .92; }
.book-label { font-size: .8rem; color: #f4c9d6; }
.book-title { font-family: "Zen Old Mincho", serif; font-size: 1.15rem; line-height: 1.7; color: #fff; margin: 6px 0 10px !important; }
.book-more { font-size: .85rem; margin-top: 0 !important; }

.faq details { background: #fff; border: 1px solid var(--line); border-radius: 8px; margin-bottom: 12px; }
.faq summary { cursor: pointer; padding: 18px 48px 18px 22px; color: var(--soil); font-weight: 500; list-style: none; position: relative; line-height: 1.6; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; color: var(--bloom); font-family: "Zen Old Mincho", serif; margin-right: 10px; }
.faq summary::after { content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%); color: var(--leaf); font-size: 1.3rem; }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding: 0 22px 20px 44px; font-size: .92rem; line-height: 1.9; }

.cta-band { background: var(--leaf); color: #fff; text-align: center; padding: 64px 0; }
.cta-title { font-family: "Zen Old Mincho", serif; font-size: clamp(1.3rem, 3vw, 1.7rem); margin-bottom: 8px; }
.cta-band .btn-row { margin-bottom: 0; }

@media (max-width: 860px) {
  .reasons { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .steps li::after { display: none; }
  .lead { margin-top: -16px; }
}


/* ---------- お便り箱 ---------- */
.otayori-form { max-width: 520px; margin: 32px auto 0; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 28px 24px; }
.otayori-field { margin-bottom: 18px; }
.otayori-field label { display: block; font-size: .9rem; color: var(--leaf); margin-bottom: 6px; }
.otayori-field input, .otayori-field textarea { width: 100%; font: inherit; color: var(--soil); background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.otayori-field textarea { min-height: 130px; resize: vertical; }
.otayori-field input:focus, .otayori-field textarea:focus { outline: 2px solid var(--bloom); outline-offset: 1px; }
.otayori-submit { display: block; width: 100%; font: inherit; letter-spacing: .1em; color: #fff; background: var(--bloom); border: 0; border-radius: 999px; padding: 12px; cursor: pointer; }
.otayori-submit:hover { background: var(--soil); }
.otayori-submit:disabled { opacity: .6; cursor: default; }
.otayori-status { margin-top: 12px; font-size: .9rem; min-height: 1.2em; text-align: center; }
.otayori-status[data-state="success"] { color: var(--leaf); }
.otayori-status[data-state="error"] { color: #b3413a; }

/* ---------- スマホ ---------- */
@media (max-width: 860px) {
  .menu-toggle { display: block; }
  .site-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 14px 16px; border-top: 1px solid var(--line); }
  .section { padding: 64px 0; }
  .feature, .voices, .shops, .links { grid-template-columns: 1fr; }
  .feature { gap: 20px; margin-bottom: 48px; }
  .feature.reverse img { order: 0; }
  .hero { height: 70vh; }
  .hero-text { bottom: 32px; }
}