@charset "UTF-8";

/* ==========================================================
   深夜特急.com — 夜行列車の色（深い藍 × 車窓の琥珀）
   長文を読ませることを最優先に設計。モバイルファースト。
   ========================================================== */

:root{
  --night:#0f1626;
  --night-2:#1a2740;
  --amber:#c98b3a;
  --amber-lt:#e0ac6b;
  --dust:#f2ece1;
  --ink:#23252b;
  --ink-soft:#565a63;
  --line:#e0d9cc;
  --bg:#faf7f2;
  --card:#ffffff;
  --warn-bg:#fbf2ee;
  --warn-line:#c07a5c;
  --tip-bg:#eef3f2;
  --tip-line:#4e8a80;
  --note-bg:#fbf5e9;
  --wrap:1080px;
  --read:44rem;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Hiragino Mincho ProN","Yu Mincho",YuMincho,"Noto Serif JP",serif;
  font-size:16px;
  line-height:1.95;
  letter-spacing:.03em;
}
img{max-width:100%;height:auto}
a{color:#9a6520;text-underline-offset:.18em}
a:hover{color:var(--amber)}

.wrap{width:min(100% - 2rem,var(--wrap));margin-inline:auto}

.skip{position:absolute;left:-9999px}
.skip:focus{left:.5rem;top:.5rem;z-index:99;background:#fff;padding:.6rem 1rem;border-radius:4px}

/* ---------- ヘッダー ---------- */
.site-head{
  background:var(--night);
  border-bottom:2px solid var(--amber);
  position:sticky;top:0;z-index:50;
}
.head-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:60px}
.brand{margin:0;font-size:1.2rem;font-weight:600;letter-spacing:.1em}
.brand a{color:#fff;text-decoration:none;display:inline-flex;align-items:baseline;gap:.1em}
.brand-mark{color:#fff}
.brand-tld{color:var(--amber-lt);font-size:.78em;font-weight:400;letter-spacing:0}

.navtoggle{display:none}
.navbtn{
  display:flex;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;padding:0 9px;cursor:pointer;
}
.navbtn span{display:block;height:2px;background:#fff;border-radius:2px;transition:.2s}
.site-nav{
  display:none;position:absolute;left:0;right:0;top:100%;
  background:var(--night-2);border-bottom:1px solid rgba(255,255,255,.12);
}
.navtoggle:checked ~ .site-nav{display:block}
.site-nav ul{list-style:none;margin:0;padding:.4rem 1rem 1rem}
.site-nav li{border-bottom:1px solid rgba(255,255,255,.08)}
.site-nav li:last-child{border-bottom:0}
.site-nav a{display:block;padding:.8rem .2rem;color:#f1ede5;text-decoration:none;font-size:.95rem}
.site-nav a:hover{color:var(--amber-lt)}

@media (min-width:860px){
  .navbtn{display:none}
  .site-nav{display:block;position:static;background:none;border:0}
  .site-nav ul{display:flex;gap:1.5rem;align-items:center;padding:0}
  .site-nav li{border:0}
  .site-nav a{padding:0;font-size:.9rem}
}

/* ---------- パンくず ---------- */
.crumbs{background:#fff;border-bottom:1px solid var(--line);font-size:.78rem}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;margin:0;padding:.55rem 0;color:var(--ink-soft)}
.crumbs li+li::before{content:"›";margin-right:.4rem;color:#c0b8a8}
.crumbs a{color:var(--ink-soft);text-decoration:none}
.crumbs a:hover{text-decoration:underline}

/* ---------- ヒーロー ---------- */
.hero{
  background:linear-gradient(165deg,var(--night) 0%,var(--night-2) 55%,#243a5c 100%);
  color:#fff;padding:3.4rem 0 3rem;position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:auto -12% -55% auto;width:min(70vw,520px);aspect-ratio:1;
  background:radial-gradient(circle,rgba(201,139,58,.3),transparent 62%);
}
.hero .wrap{position:relative;z-index:1}
.hero h1{
  margin:0 0 1rem;font-size:clamp(1.55rem,5vw,2.4rem);line-height:1.6;
  letter-spacing:.04em;color:#fff;font-weight:600;
}
.hero h1 em{font-style:normal;color:var(--amber-lt)}
.hero .lead{margin:0;max-width:38rem;font-size:1rem;color:#dfe2ea;line-height:2}
.hero-meta{margin:1.6rem 0 0;font-size:.78rem;color:#a9b0be;letter-spacing:.05em}

/* ---------- 本文 ---------- */
.page{padding:2.4rem 0 3rem}
.page > .wrap{max-width:none}
.body{max-width:var(--read);margin-inline:auto}
.body.wide{max-width:var(--wrap)}

h1.page-title{
  margin:0 0 .7rem;font-size:clamp(1.4rem,4.4vw,2rem);line-height:1.6;
  color:var(--night);letter-spacing:.03em;font-weight:600;
}
.lead-note{
  margin:0 0 2rem;padding-bottom:1.4rem;border-bottom:1px solid var(--line);
  color:var(--ink-soft);font-size:.97rem;
}
.updated{font-size:.75rem;color:#93897a;margin:.2rem 0 1.6rem;letter-spacing:.04em}

.body h2{
  margin:2.9rem 0 1rem;padding:.55rem 0 .55rem .9rem;
  font-size:clamp(1.12rem,3.4vw,1.35rem);line-height:1.6;color:var(--night);
  border-left:3px solid var(--amber);background:linear-gradient(90deg,var(--dust),transparent 72%);
  font-weight:600;
}
.body h3{
  margin:2.1rem 0 .7rem;font-size:1.05rem;line-height:1.65;color:var(--night-2);
  padding-bottom:.35rem;border-bottom:1px dotted var(--line);font-weight:600;
}
.body h4{margin:1.5rem 0 .5rem;font-size:.98rem;color:var(--ink)}
.body p{margin:0 0 1.3rem}
.body ul,.body ol{margin:0 0 1.4rem;padding-left:1.35rem}
.body li{margin-bottom:.65rem}
.body strong{font-weight:700;background:linear-gradient(transparent 64%,rgba(224,172,107,.5) 64%)}
.body em{font-style:normal;font-weight:700;color:#9a6520}

/* ---------- 囲み ---------- */
.box{margin:1.9rem 0;padding:1.15rem 1.3rem;border-radius:6px;font-size:.94rem;line-height:1.9}
.box > :first-child{margin-top:0}
.box > :last-child{margin-bottom:0}
.box .box-t{display:block;font-weight:700;margin-bottom:.5rem;font-size:.93rem}

.box.warn{background:var(--warn-bg);border-left:3px solid var(--warn-line)}
.box.warn .box-t{color:#a5573a}
.box.tip{background:var(--tip-bg);border-left:3px solid var(--tip-line)}
.box.tip .box-t{color:#34675e}
.box.note{background:var(--note-bg);border-left:3px solid var(--amber)}
.box.note .box-t{color:#9a6520}
.box.quote{background:#fff;border:1px solid var(--line);border-left:3px solid var(--night-2);color:var(--ink-soft)}

/* ---------- 表 ---------- */
.tablewrap{overflow-x:auto;margin:1.9rem 0;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;min-width:30rem;font-size:.89rem;background:#fff}
th,td{border:1px solid var(--line);padding:.7rem .85rem;text-align:left;vertical-align:top;line-height:1.8}
thead th{background:var(--night);color:#fff;font-weight:600;white-space:nowrap}
tbody th{background:var(--dust);color:var(--night);font-weight:600;white-space:nowrap}
tbody tr:nth-child(even) td{background:#fbfaf7}

/* ---------- カード ---------- */
.cards{list-style:none;display:grid;gap:1rem;padding:0;margin:1.9rem 0;grid-template-columns:1fr}
@media (min-width:680px){.cards{grid-template-columns:repeat(2,1fr)}}
@media (min-width:980px){.cards.c3{grid-template-columns:repeat(3,1fr)}}
.cards li{margin:0}
.card{
  display:block;height:100%;padding:1.25rem 1.3rem;background:var(--card);
  border:1px solid var(--line);border-radius:6px;text-decoration:none;color:inherit;
  transition:border-color .18s,transform .18s,box-shadow .18s;
}
.card:hover{border-color:var(--amber);transform:translateY(-2px);box-shadow:0 6px 18px rgba(15,22,38,.09)}
.card .kicker{display:block;font-size:.72rem;letter-spacing:.14em;color:var(--amber);margin-bottom:.45rem}
.card .card-t{display:block;font-weight:700;font-size:1.02rem;color:var(--night);margin-bottom:.45rem;line-height:1.6}
.card .card-d{display:block;font-size:.86rem;color:var(--ink-soft);line-height:1.85}

/* ---------- 巻リスト（全6巻） ---------- */
.volumes{list-style:none;margin:1.9rem 0;padding:0;display:grid;gap:.9rem}
.volume{
  display:grid;grid-template-columns:auto 1fr;gap:1rem;align-items:start;
  padding:1.2rem 1.3rem;background:var(--card);border:1px solid var(--line);border-radius:6px;
}
.vol-no{
  display:flex;align-items:center;justify-content:center;
  width:2.6rem;height:2.6rem;border-radius:50%;
  background:var(--night);color:var(--amber-lt);
  font-size:1.05rem;font-weight:700;letter-spacing:0;
}
.vol-body h3{margin:0 0 .4rem;border:0;padding:0;font-size:1.04rem;color:var(--night)}
.vol-body p{margin:0;font-size:.9rem;color:var(--ink-soft);line-height:1.85}

/* ---------- ルート（行程） ---------- */
.legs{margin:1.9rem 0;border-left:2px solid var(--amber);padding-left:0;list-style:none}
.leg{position:relative;margin:0 0 1.7rem 1.6rem}
.leg::before{
  content:"";position:absolute;left:-1.95rem;top:.55rem;width:10px;height:10px;
  border-radius:50%;background:var(--amber);border:2px solid var(--bg);box-shadow:0 0 0 2px var(--amber);
}
.leg-place{display:block;font-size:1rem;font-weight:700;color:var(--night);margin-bottom:.3rem}
.leg-note{display:block;font-size:.88rem;color:var(--ink-soft);line-height:1.85}
.leg-tag{
  display:inline-block;font-size:.7rem;padding:.14rem .55rem;border-radius:4px;
  margin-left:.5rem;vertical-align:middle;letter-spacing:.05em;font-weight:600;
}
.leg-tag.now{background:#eaf2f0;color:#34675e}
.leg-tag.then{background:#f7efe3;color:#9a6520}

/* ---------- 週別カード（/trip/route/ 配下） ---------- */
.weeks{margin:1.9rem 0;padding:0;list-style:none;display:grid;gap:1.1rem}
.week{
  border:1px solid var(--line);border-radius:8px;background:var(--card);
  padding:1.2rem 1.3rem;
}
.week-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:.7rem;margin-bottom:.6rem}
.week-no{
  flex:0 0 auto;font-size:.82rem;font-weight:700;letter-spacing:.06em;
  background:var(--night);color:var(--amber-lt);
  padding:.22rem .7rem;border-radius:999px;
}
.week-head h3{
  margin:0;border:0;padding:0;font-size:1.05rem;line-height:1.5;color:var(--night);
}
.week-route{
  margin:0 0 .8rem;font-size:.88rem;line-height:1.8;color:var(--ink);
  padding:.55rem .75rem;background:var(--dust);border-radius:5px;
}
.week-meta{
  margin:0 0 .9rem;display:grid;gap:.45rem .9rem;
  grid-template-columns:1fr;font-size:.84rem;
}
@media (min-width:560px){.week-meta{grid-template-columns:repeat(2,1fr)}}
.week-meta > div{display:flex;gap:.5rem;align-items:baseline}
.week-meta dt{
  flex:0 0 5.2em;color:var(--amber);font-weight:600;font-size:.78rem;letter-spacing:.03em;
}
.week-meta dd{margin:0;color:var(--ink);line-height:1.7}
.week-notes{margin:0;padding:0;list-style:none;font-size:.87rem;line-height:1.85}
.week-notes li{margin:0 0 .5rem;padding-left:.2rem}
.week-notes li:last-child{margin-bottom:0}
.week-notes b{
  display:inline-block;min-width:5.5em;color:var(--night-2);font-weight:700;font-size:.82rem;
}
.week-notes li.live b{color:#a5573a}

/* ---------- CTA ---------- */
.cta{
  margin:2.5rem 0;padding:1.6rem 1.4rem;border-radius:8px;
  background:linear-gradient(150deg,var(--night),var(--night-2));color:#fff;
}
.cta h2{margin:0 0 .6rem;padding:0;border:0;background:none;color:#fff;font-size:1.12rem}
.cta p{margin:0 0 1.2rem;font-size:.92rem;color:#d9dde6;line-height:1.9}
.btn{
  display:inline-block;padding:.85rem 1.7rem;border-radius:3px;
  background:linear-gradient(135deg,var(--amber),var(--amber-lt));
  color:#fff;font-weight:700;text-decoration:none;font-size:.94rem;
  box-shadow:0 4px 14px rgba(201,139,58,.32);
}
.btn:hover{color:#fff;filter:brightness(1.06)}
.btn.ghost{background:none;border:1px solid rgba(255,255,255,.5);color:#fff;box-shadow:none}
.btn.ghost:hover{color:#fff;border-color:var(--amber-lt)}

/* ---------- FAQ ---------- */
.faq{margin:1.9rem 0;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;padding:1rem .4rem 1rem 2rem;font-weight:600;position:relative;
  color:var(--night);list-style:none;line-height:1.75;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q";position:absolute;left:.3rem;color:var(--amber);font-weight:700}
.faq .a{padding:0 .4rem 1.1rem 2rem;position:relative;font-size:.93rem;color:var(--ink-soft)}
.faq .a::before{content:"A";position:absolute;left:.3rem;top:0;color:var(--night-2);font-weight:700}
.faq .a > :last-child{margin-bottom:0}

/* ---------- 書誌・出典 ---------- */
.sources{margin:1.7rem 0;padding:1rem 1.2rem;background:#fff;border:1px solid var(--line);border-radius:6px;font-size:.82rem;color:var(--ink-soft)}
.sources h4{margin:0 0 .5rem;font-size:.8rem;color:var(--night)}
.sources ul{margin:0;padding-left:1.2rem}
.sources li{margin-bottom:.3rem}

/* ---------- 目次 ---------- */
.toc{
  margin:0 0 2.4rem;padding:1.2rem 1.35rem;background:#fff;
  border:1px solid var(--line);border-radius:6px;
}
.toc h2{margin:0 0 .7rem;padding:0;border:0;background:none;font-size:.9rem;letter-spacing:.1em;color:var(--amber)}
.toc ol{margin:0;padding-left:1.3rem;font-size:.92rem}
.toc li{margin-bottom:.45rem}
.toc a{color:var(--night);text-decoration:none}
.toc a:hover{text-decoration:underline;color:var(--amber)}

/* ---------- 関連リンク ---------- */
.related{margin:3rem 0 0;padding-top:1.6rem;border-top:2px solid var(--line)}
.related h2{margin:0 0 1rem;padding:0;border:0;background:none;font-size:1.05rem;color:var(--night)}
.related ul{list-style:none;padding:0;margin:0;display:grid;gap:.55rem}
.related a{
  display:block;padding:.78rem .95rem;background:#fff;border:1px solid var(--line);
  border-radius:5px;text-decoration:none;color:var(--night);font-size:.92rem;font-weight:600;
}
.related a:hover{border-color:var(--amber);background:#fffdf8}
.related a small{display:block;font-weight:400;color:var(--ink-soft);font-size:.8rem;margin-top:.15rem}

/* ---------- フッター ---------- */
.site-foot{background:var(--night);color:#c7cbd6;padding:2.7rem 0 1.8rem;margin-top:3rem;font-size:.87rem}
.foot-cols{display:grid;gap:1.8rem;grid-template-columns:1fr}
@media (min-width:680px){.foot-cols{grid-template-columns:repeat(2,1fr)}}
@media (min-width:980px){.foot-cols{grid-template-columns:repeat(4,1fr)}}
.foot-col h2{margin:0 0 .75rem;font-size:.8rem;letter-spacing:.12em;color:var(--amber-lt);font-weight:600}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin-bottom:.5rem}
.foot-col a{color:#c7cbd6;text-decoration:none}
.foot-col a:hover{color:#fff;text-decoration:underline}
.foot-note{
  margin:2.2rem 0 1rem;padding-top:1.4rem;border-top:1px solid rgba(255,255,255,.14);
  font-size:.78rem;color:#969db0;line-height:1.9;
}
.copy{margin:0;font-size:.75rem;color:#7b8398}

/* ---------- お問い合わせフォーム ---------- */
.cform{margin:2rem 0}
.cform .fld{margin:0 0 1.5rem}
.cform label{display:block;font-weight:700;font-size:.92rem;margin-bottom:.4rem;color:var(--night)}
.cform .req,.cform .opt{
  display:inline-block;margin-left:.6rem;padding:.1rem .5rem;border-radius:3px;
  font-size:.7rem;font-weight:600;vertical-align:middle;
}
.cform .req{background:var(--amber);color:#fff}
.cform .opt{background:var(--line);color:var(--ink-soft)}
.cform input[type=text],.cform input[type=email],.cform textarea{
  width:100%;padding:.7rem .8rem;border:1px solid #ccc4b4;border-radius:4px;
  font-size:1rem;font-family:inherit;line-height:1.7;background:#fff;color:var(--ink);
}
.cform input:focus,.cform textarea:focus{outline:2px solid var(--amber);outline-offset:1px;border-color:var(--amber)}
.cform small{display:block;margin-top:.35rem;font-size:.8rem;color:var(--ink-soft)}
.cform .agree{font-size:.85rem;color:var(--ink-soft)}
.cform .submit{margin:2rem 0 0}
.cform .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* ---------- 印刷 ---------- */
@media print{
  .site-head,.site-foot,.crumbs,.cta,.related{display:none}
  body{background:#fff;font-size:11pt}
}