/* M&Associates Education — design tokens (現行サイトのトーンを踏襲)
   欧文: ambroise-std（Adobe Fonts。本番は自社キットで再発行）→ 代替 Bodoni Moda
   和文: Noto Serif JP */
:root{
  --ink:#465a6e;          /* 基調・本文 */
  --ink-deep:#2b3a49;     /* 見出しの締め（基調を暗くした派生） */
  --gold:#b89f64;         /* アクセント */
  --gold-soft:#d9c99f;
  --mist:#eff4f9;         /* ペールブルー面 */
  --sand:#eae5db;         /* ベージュ面 */
  --paper:#fbfaf7;
  --dr:#006eb8;           /* 歯科医師 */
  --staff:#009090;        /* スタッフ */
  --terra:#b44e3d;
  --line:rgba(70,90,110,.18);

  --f-en:"ambroise-std","Bodoni Moda","Didot",serif;
  --f-ja:"Noto Serif JP","Hiragino Mincho ProN",serif;

  --ease:cubic-bezier(.22,.8,.18,1);
  --ease-io:cubic-bezier(.65,0,.35,1);
  --gutter:clamp(20px,4vw,64px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}
body{margin:0;font-family:var(--f-ja);color:var(--ink);background:var(--paper);font-feature-settings:"palt";line-height:1.9;letter-spacing:.04em}
img,video{display:block;max-width:100%}
a{color:inherit}
.en{font-family:var(--f-en);letter-spacing:.02em}
.label{font-family:var(--f-en);font-size:12px;letter-spacing:.32em;text-transform:uppercase;color:var(--gold)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* line mask reveal */
.mask{display:block;overflow:hidden;padding-bottom:.06em}
.mask>span{display:inline-block;transform:translateY(110%);transition:transform 1.3s var(--ease)}
.is-in .mask>span{transform:none}
.is-in .mask:nth-child(2)>span{transition-delay:.08s}
.is-in .mask:nth-child(3)>span{transition-delay:.16s}
.is-in .mask:nth-child(4)>span{transition-delay:.24s}
.fade{opacity:0;transform:translateY(14px);transition:opacity 1.1s var(--ease),transform 1.1s var(--ease)}
.is-in .fade{opacity:1;transform:none}

/* header */
.hdr{position:fixed;inset:0 0 auto;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:18px var(--gutter);transition:background .4s,backdrop-filter .4s}
.hdr.solid{background:rgba(251,250,247,.82);backdrop-filter:saturate(1.4) blur(14px)}
.hdr img{height:30px;width:auto}
.hdr nav{display:flex;gap:28px;font-size:13px;letter-spacing:.12em}
.hdr nav a{text-decoration:none;position:relative}
.hdr nav a::after{content:"";position:absolute;left:0;right:100%;bottom:-4px;height:1px;background:var(--gold);transition:right .5s var(--ease)}
.hdr nav a:hover::after{right:0}
.btn{display:inline-flex;align-items:center;gap:12px;padding:14px 26px;border:1px solid var(--ink);text-decoration:none;font-size:13px;letter-spacing:.18em;transition:background .4s var(--ease),color .4s}
.btn:hover{background:var(--ink);color:#fff}
.btn.gold{background:var(--gold);border-color:var(--gold);color:#fff}
.btn.gold:hover{background:var(--ink-deep);border-color:var(--ink-deep)}
.btn .arr{width:22px;height:1px;background:currentColor;position:relative}
.btn .arr::after{content:"";position:absolute;right:0;top:-3px;width:7px;height:7px;border-top:1px solid currentColor;border-right:1px solid currentColor;transform:rotate(45deg)}
@media (max-width:860px){
  .hdr{padding:14px var(--gutter)}
  .hdr nav{display:none}
  .hdr img{height:26px}
  .hdr>.btn{padding:10px 14px;font-size:11px;letter-spacing:.14em;gap:8px}
  .hdr>.btn .arr{width:14px}
  .label{font-size:11px;letter-spacing:.24em}
}

/* seat chip (キャンセル待ちロジックと連動する表示) */
.seat{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.12em}
.seat i{width:7px;height:7px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 0 rgba(184,159,100,.6);animation:pulse 2.4s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 10px rgba(184,159,100,0)}100%{box-shadow:0 0 0 0 rgba(184,159,100,0)}}

/* dock: 画面下の常時CTA。ヒーローを過ぎたら現れ、募集状態を常に見せる */
.dock{position:fixed;z-index:60;right:var(--gutter);bottom:22px;display:flex;align-items:center;gap:26px;padding:10px 10px 10px 22px;background:rgba(251,250,247,.9);backdrop-filter:blur(14px) saturate(1.3);-webkit-backdrop-filter:blur(14px) saturate(1.3);border:1px solid var(--line);box-shadow:0 28px 56px -30px rgba(43,58,73,.5);transform:translateY(calc(100% + 40px));opacity:0;transition:transform .9s var(--ease),opacity .6s}
.dock.show{transform:none;opacity:1}
.dock__st{display:grid;gap:2px;line-height:1.5}
.dock__st .seat{font-weight:600;color:var(--ink-deep)}
.dock__st small{font-size:11px;letter-spacing:.08em;color:#7d8b98}
.dock .btn{padding:12px 20px}
@media (max-width:860px){
  .dock{left:0;right:0;bottom:0;border-width:1px 0 0;gap:12px;padding:10px var(--gutter) calc(10px + env(safe-area-inset-bottom));justify-content:space-between;box-shadow:0 -12px 32px -20px rgba(43,58,73,.35)}
  .dock .btn{padding:12px 16px;font-size:12px;white-space:nowrap}
  .dock__st small{display:block;font-size:10.5px}
  .dock__st .lg{display:none}
  main{padding-bottom:72px}
}

/* 講師名（ヒーロー動画と同期） */
.fac{display:inline-grid;gap:2px;line-height:1.3;transition:opacity .45s var(--ease)}
.fac.swap{opacity:0}
.fac b{font-weight:500;font-size:15px;letter-spacing:.06em}
.fac small{font-family:var(--f-ja);font-size:11px;letter-spacing:.14em;opacity:.85}

/* Q&Aショート（共通の骨格。配置は各案で指定） */
.qa{position:relative;cursor:pointer;outline:none}
.qa .v{position:relative;aspect-ratio:4/3;overflow:hidden;background:#fff;border:1px solid var(--line)}
.qa video{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease),filter .6s}
.qa:not(.playing) video{filter:saturate(.75)}
.qa:hover video{transform:scale(1.03)}
.qa .play{position:absolute;right:14px;bottom:14px;width:48px;height:48px;border-radius:50%;background:rgba(43,58,73,.86);display:grid;place-items:center;transition:transform .5s var(--ease)}
.qa:hover .play{transform:scale(1.08)}
.qa .play::before{content:"";margin-left:4px;border-left:11px solid #fff;border-top:7px solid transparent;border-bottom:7px solid transparent}
.qa.playing .play::before{margin:0;border:0;width:11px;height:13px;border-left:3px solid #fff;border-right:3px solid #fff}
.qa .q{display:flex;gap:12px;align-items:baseline;margin:0 0 14px}
.qa .q b{font-family:var(--f-en);font-weight:500;font-size:30px;line-height:1;color:var(--gold)}
.qa .q h3{margin:0;font-size:15px;line-height:1.7;font-weight:600;color:var(--ink-deep)}
.qa .who{margin:12px 0 0;font-size:11.5px;letter-spacing:.12em;color:#7d8b98}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .mask>span,.fade{transform:none;opacity:1}
}