/* =========================================================
   SYNAPTICA / 予算とルート — 旅行サイト共通スタイル
   ========================================================= */

:root{
  --bg:        #fbf9f5;
  --surface:   #ffffff;
  --ink:       #23303a;
  --ink-soft:  #55636e;
  --line:      #e7e1d6;
  --accent:    #d1583f;
  --accent-dk: #b8442d;
  --teal:      #2e6e6a;
  --gold:      #c99a3f;
  --radius:    14px;
  --shadow:    0 10px 30px rgba(35,48,58,.08);
  --maxw:      760px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Zen Kaku Gothic New","Noto Sans JP",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;line-height:1.9;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

/* ヘッダー */
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,249,245,.9);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}
.nav{max-width:1080px;margin:0 auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;flex-direction:column;line-height:1.1;text-decoration:none;color:var(--ink)}
.brand b{font-family:"Zen Old Mincho",serif;font-size:22px;letter-spacing:.06em}
.brand small{font-size:11px;letter-spacing:.24em;color:var(--ink-soft);margin-top:3px}
.nav-links{display:flex;gap:22px;flex-wrap:wrap}
.nav-links a{color:var(--ink-soft);font-size:14px;letter-spacing:.04em}
.nav-links a:hover{color:var(--accent);text-decoration:none}

/* ヒーロー */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#26514e 0%,#2e6e6a 45%,#c99a3f 130%);color:#fff;text-align:center;padding:96px 22px 104px}
.hero::after{content:"";position:absolute;inset:0;opacity:.14;background-image:radial-gradient(circle at 20% 30%,#fff 0 2px,transparent 2px),radial-gradient(circle at 70% 60%,#fff 0 2px,transparent 2px),radial-gradient(circle at 85% 20%,#fff 0 1.5px,transparent 1.5px);background-size:180px 180px,220px 220px,140px 140px}
.hero-inner{position:relative;z-index:1;max-width:720px;margin:0 auto}
.hero .eyebrow{letter-spacing:.4em;font-size:12px;opacity:.85;margin:0 0 18px}
.hero h1{font-family:"Zen Old Mincho",serif;font-weight:600;font-size:clamp(30px,6vw,52px);line-height:1.35;margin:0 0 18px}
.hero p{font-size:16px;opacity:.92;margin:0 auto;max-width:540px}

/* レイアウト */
.container{max-width:1080px;margin:0 auto;padding:0 22px}
.section{padding:64px 0}
.section-head{margin:0 0 30px}
.section-head h2{font-family:"Zen Old Mincho",serif;font-size:26px;margin:0;display:inline-block;padding-bottom:8px;border-bottom:3px solid var(--accent)}
.section-head p{color:var(--ink-soft);font-size:14px;margin:12px 0 0}

/* 記事カード */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:26px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .2s ease, box-shadow .2s ease}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(35,48,58,.14)}
.card a{color:inherit;text-decoration:none;display:flex;flex-direction:column;height:100%}
.card .thumb{aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;color:#fff;font-family:"Zen Old Mincho",serif;font-size:30px;letter-spacing:.1em;background:linear-gradient(135deg,#2e6e6a,#26514e)}
.card .thumb.venice{background:linear-gradient(135deg,#3a6ea5,#274b73)}
.card .thumb.hokkaido{background:linear-gradient(135deg,#4a7c92,#2b5566)}
.card .thumb.aomori{background:linear-gradient(135deg,#8a4b6b,#5a2f47)}
.card .body{padding:20px 22px 24px}
.card .cat{font-size:11px;letter-spacing:.2em;color:var(--teal);font-weight:700}
.card h3{font-family:"Zen Old Mincho",serif;font-size:19px;line-height:1.5;margin:8px 0 10px}
.card p{font-size:14px;color:var(--ink-soft);margin:0}
.card .meta{margin-top:14px;font-size:12px;color:var(--ink-soft);display:flex;gap:12px}

/* 記事本文 */
.article{max-width:var(--maxw);margin:0 auto;padding:44px 22px 20px}
.article .kicker{font-size:12px;letter-spacing:.24em;color:var(--teal);font-weight:700}
.article h1{font-family:"Zen Old Mincho",serif;font-weight:600;font-size:clamp(26px,4.5vw,38px);line-height:1.4;margin:10px 0 16px}
.article .lead{color:var(--ink-soft);font-size:16px}
.article .byline{display:flex;gap:14px;align-items:center;font-size:13px;color:var(--ink-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0;margin:24px 0 8px}
.article h2{font-family:"Zen Old Mincho",serif;font-size:24px;line-height:1.5;margin:52px 0 14px;padding-left:14px;border-left:5px solid var(--accent)}
.article h3{font-size:19px;margin:34px 0 8px;color:var(--ink)}
.article p{margin:0 0 18px}
.article ul{padding-left:1.2em;margin:0 0 18px}
.article li{margin:6px 0}

/* 目次 */
.toc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin:26px 0 8px;box-shadow:var(--shadow)}
.toc h4{margin:0 0 12px;font-size:14px;letter-spacing:.1em;color:var(--ink-soft)}
.toc ol{margin:0;padding-left:1.3em}
.toc li{margin:5px 0;font-size:14.5px}
.toc a{color:var(--ink)}
.toc a:hover{color:var(--accent)}

/* 写真プレースホルダー */
.photo{border:2px dashed #cdbfa8;border-radius:var(--radius);background:repeating-linear-gradient(45deg,#f3eee3,#f3eee3 12px,#efe8da 12px,#efe8da 24px);color:#9a8b70;text-align:center;padding:34px 20px;margin:22px 0;font-size:13.5px;letter-spacing:.02em}
.photo::before{content:"📷";display:block;font-size:26px;margin-bottom:8px}

/* アフィリエイトCTA */
.cta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:12px;padding:16px 20px;margin:22px 0;box-shadow:var(--shadow)}
.cta .pr{flex:0 0 auto;font-size:10px;font-weight:700;letter-spacing:.1em;color:#fff;background:var(--ink-soft);border-radius:4px;padding:3px 7px}
.cta .txt{flex:1 1 200px;font-size:14.5px;color:var(--ink)}
.cta .btn{flex:0 0 auto;background:var(--accent);color:#fff;font-weight:700;font-size:14px;padding:10px 20px;border-radius:999px;white-space:nowrap}
.cta .btn:hover{background:var(--accent-dk);text-decoration:none}
.cta.placeholder{border-left-color:#b9b0a0;opacity:.9}
.cta.placeholder .btn{background:#b9b0a0}

/* 注記・締め */
.note-small{font-size:12.5px;color:var(--ink-soft);background:#f4efe6;border-radius:10px;padding:14px 18px;margin:26px 0}
.next-hint{margin:40px 0 10px;padding:22px 24px;border-radius:var(--radius);background:linear-gradient(135deg,#2e6e6a,#26514e);color:#fff;text-align:center}
.next-hint h4{font-family:"Zen Old Mincho",serif;margin:0 0 8px;font-size:18px}
.next-hint p{margin:0;font-size:14px;opacity:.9}

/* 静的ページ */
.page{max-width:var(--maxw);margin:0 auto;padding:56px 22px}
.page h1{font-family:"Zen Old Mincho",serif;font-size:30px;margin:0 0 8px}
.page h2{font-size:19px;margin:32px 0 8px;border-left:4px solid var(--accent);padding-left:12px}
.page p,.page li{color:var(--ink)}
.page .updated{color:var(--ink-soft);font-size:13px;margin-bottom:24px}
.fillin{background:#fff3cd;border-radius:4px;padding:1px 6px;color:#7a5b00;font-size:.9em}

/* フッター */
.site-footer{background:#23303a;color:#cdd6dd;margin-top:60px}
.foot-inner{max-width:1080px;margin:0 auto;padding:40px 22px;display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between}
.foot-inner .fb b{font-family:"Zen Old Mincho",serif;color:#fff;font-size:18px;letter-spacing:.06em}
.foot-inner .fb small{display:block;color:#8ea0ab;margin-top:6px;font-size:12px}
.foot-links{display:flex;gap:20px;flex-wrap:wrap}
.foot-links a{color:#cdd6dd;font-size:13px}
.foot-links a:hover{color:#fff}
.copyright{border-top:1px solid #34424d;text-align:center;color:#8ea0ab;font-size:12px;padding:16px}
.back{display:inline-block;margin:6px 0 0;font-size:13px;color:var(--ink-soft)}
.back:hover{color:var(--accent);text-decoration:none}

@media(max-width:640px){
  body{font-size:16px}
  .section{padding:48px 0}
  .hero{padding:72px 20px 80px}
  .nav-links{gap:14px}
}