@charset "utf-8";
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700;900&family=Outfit:wght@300;600;800&display=swap");
/* ==========================================================================
   第14回 次世代の臨床外科医のための特別セミナー  オンデマンド配信サイト
   modern.css  v2 (2026-09-08)
   - v1 の全クラスを踏襲（sess-head / talk / play / group / chair / info …）
     ＝ 講演ページ(pre, open, lec01-04, pd, bs, close)は HTML 無変更で見た目だけ刷新
   - トップページ用に hero / facts / pgrid / gal を追加
   ========================================================================== */

/* ---------- tokens ---------- */
:root{
  --teal-900:#08343a; --teal-800:#0a454d; --teal-700:#0f5b64; --teal-500:#17828f;
  --brand:#0f5b64; --accent:#e2563f; --coral:#e2563f; --coral-d:#c8462f;
  --ink:#12211f; --ink-1:#12211f; --ink-2:#40534f; --ink-3:#7b8a86;
  --bg:#f5f7f6; --panel:#ffffff; --surface:#ffffff; --line:#e2e8e6;
  --shadow:0 1px 2px rgba(8,52,58,.05), 0 10px 30px rgba(8,52,58,.07);
  --shadow-lg:0 2px 6px rgba(8,52,58,.06), 0 22px 50px rgba(8,52,58,.13);
  --radius:16px;
}
html[data-theme="dark"]{
  --brand:#3fb4bf; --ink:#e8efed; --ink-1:#e8efed; --ink-2:#a9bab6; --ink-3:#7d908c;
  --bg:#0b1413; --panel:#121e1d; --surface:#121e1d; --line:#22322f;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.35);
  --shadow-lg:0 2px 6px rgba(0,0,0,.45), 0 22px 50px rgba(0,0,0,.5);
}
@media (prefers-color-scheme:dark){
  html:not([data-theme="light"]){
    --brand:#3fb4bf; --ink:#e8efed; --ink-1:#e8efed; --ink-2:#a9bab6; --ink-3:#7d908c;
    --bg:#0b1413; --panel:#121e1d; --surface:#121e1d; --line:#22322f;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 10px 30px rgba(0,0,0,.35);
    --shadow-lg:0 2px 6px rgba(0,0,0,.45), 0 22px 50px rgba(0,0,0,.5);
  }
}

*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink-1);
  font-family:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;
  font-size:15px;line-height:1.8;-webkit-font-smoothing:antialiased;text-size-adjust:100%}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ---------- topbar ---------- */
.topbar{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:12px;
  padding:10px 20px;background:color-mix(in srgb,var(--panel) 82%,transparent);
  backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid var(--line)}
.menu-btn,.theme-btn{border:1px solid var(--line);background:var(--panel);color:var(--ink-2);
  width:38px;height:38px;border-radius:11px;font-size:16px;cursor:pointer;transition:.2s}
.menu-btn:hover,.theme-btn:hover{color:var(--brand);border-color:var(--teal-500)}
.menu-btn{display:none}
.brandmark{display:flex;align-items:center;gap:12px;min-width:0}
.crest{width:40px;height:40px;flex:0 0 40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(150deg,var(--teal-700),var(--teal-500));color:#fff;
  font-weight:700;font-size:12.5px;letter-spacing:.5px;box-shadow:0 6px 16px rgba(15,91,100,.35)}
.brandtext{min-width:0}
.brandtext .ey{font-family:Outfit,sans-serif;font-size:10.5px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--teal-500);font-weight:600;line-height:1}
.brandtext h1{margin:2px 0 0;font-size:14px;font-weight:700;letter-spacing:.01em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.spacer{flex:1}

/* ---------- hero (トップページ) ---------- */
.hero{position:relative;overflow:hidden;color:#eaf6f5;
  background:
    radial-gradient(900px 460px at 80% -8%, rgba(23,130,143,.42), transparent 64%),
    radial-gradient(700px 400px at 6% 110%, rgba(226,86,63,.26), transparent 62%),
    linear-gradient(160deg, rgba(6,42,47,.90) 0%, rgba(8,55,62,.80) 42%, rgba(6,38,43,.93) 100%),
    url("../img/hero.jpg") center 42%/cover no-repeat;
  padding:64px 20px 0}
.hero .rings{position:absolute;right:-160px;top:-190px;width:660px;height:660px;opacity:.10;pointer-events:none}
.hero .grid{position:absolute;inset:0;opacity:.08;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(78% 62% at 50% 12%,#000,transparent 72%);
          mask-image:radial-gradient(78% 62% at 50% 12%,#000,transparent 72%)}
.hero .wm{position:absolute;left:2%;bottom:-14px;font-family:Outfit,sans-serif;font-weight:800;
  font-size:clamp(150px,26vw,320px);line-height:.78;letter-spacing:-.05em;
  color:rgba(255,255,255,.07);pointer-events:none;user-select:none}
.hero-in{position:relative;max-width:1180px;margin:0 auto;padding-bottom:60px}
.hero .kick{display:inline-flex;align-items:center;gap:9px;font-family:Outfit,sans-serif;font-weight:600;
  font-size:11.5px;letter-spacing:.26em;text-transform:uppercase;color:#7fe3e0}
.hero .kick::before{content:"";width:26px;height:2px;background:var(--coral);border-radius:2px}
.hero h2{margin:18px 0 0;font-size:clamp(28px,4.4vw,52px);font-weight:900;line-height:1.24;
  letter-spacing:.005em;color:#fff;text-wrap:balance}
.hero h2 .accent{background:linear-gradient(transparent 62%,rgba(226,86,63,.5) 62%)}
.hero .lead{margin:20px 0 0;max-width:660px;color:#bfdedc;font-size:15.5px}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.btn{display:inline-flex;align-items:center;gap:9px;height:50px;padding:0 24px;border-radius:999px;
  font-weight:700;font-size:14.5px;transition:.22s cubic-bezier(.2,.7,.2,1);border:1px solid transparent}
.btn-p{background:var(--coral);color:#fff;box-shadow:0 10px 26px rgba(226,86,63,.4)}
.btn-p:hover{background:var(--coral-d);transform:translateY(-2px);box-shadow:0 16px 34px rgba(226,86,63,.5)}
.btn-g{border-color:rgba(255,255,255,.35);color:#fff}
.btn-g:hover{background:rgba(255,255,255,.1);transform:translateY(-2px)}
.facts{position:relative;max-width:1180px;margin:0 auto;display:grid;
  grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.16);border-radius:18px 18px 0 0;overflow:hidden}
.fact{background:rgba(8,52,58,.55);backdrop-filter:blur(6px);padding:20px 22px}
.fact .n{font-family:Outfit,sans-serif;font-weight:800;font-size:30px;line-height:1;color:#fff}
.fact .n small{font-size:14px;font-weight:600;margin-left:3px;color:#8fd6d2}
.fact .l{margin-top:7px;font-size:11.5px;letter-spacing:.12em;color:#9fcecb}

/* ---------- layout ---------- */
.shell{max-width:1180px;margin:0 auto;padding:0 20px 60px;display:grid;
  grid-template-columns:246px 1fr;gap:34px;align-items:start}
.side{position:sticky;top:74px;padding-top:34px}
.side .label{font-size:10.5px;letter-spacing:.2em;color:var(--ink-3);font-weight:700;margin:0 0 10px 12px}
.menu{display:flex;flex-direction:column;gap:2px}
.menu a{display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:11px;
  font-size:13.5px;color:var(--ink-2);transition:.18s}
.menu a .idx{font-family:Outfit,sans-serif;font-size:11px;font-weight:600;color:var(--ink-3);
  width:20px;text-align:center;flex:0 0 20px}
.menu a:hover{background:color-mix(in srgb,var(--teal-500) 9%,transparent);color:var(--brand)}
.menu a.active{background:var(--teal-700);color:#fff;font-weight:700;box-shadow:0 8px 20px rgba(15,91,100,.3)}
.menu a.active .idx{color:#8fd6d2}
.side .card{margin-top:20px;padding:16px;border:1px solid var(--line);border-radius:14px;
  background:var(--panel);box-shadow:var(--shadow)}
.side .card .t{font-size:10.5px;letter-spacing:.15em;color:var(--ink-3);font-weight:700}
.side .card .d{margin-top:6px;font-weight:700;font-size:15px}
.side .card .d small{display:block;font-weight:400;font-size:12px;color:var(--ink-2);margin-top:2px}
main{padding-top:34px;min-width:0}

/* ---------- section head ---------- */
.sec{display:flex;align-items:baseline;gap:14px;margin:0 0 18px}
.sec h3{margin:0;font-size:20px;font-weight:900;letter-spacing:.01em}
.sec .en{font-family:Outfit,sans-serif;font-size:11px;font-weight:600;letter-spacing:.2em;
  text-transform:uppercase;color:var(--teal-500)}
.sec .rule{flex:1;height:1px;background:var(--line)}

/* ---------- program cards (トップページ) ---------- */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.pcard{position:relative;display:flex;flex-direction:column;padding:20px 20px 18px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;transition:.26s cubic-bezier(.2,.7,.2,1)}
.pcard::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent-c,var(--teal-500));
  transform:scaleY(.28);transform-origin:top;transition:transform .3s cubic-bezier(.2,.7,.2,1)}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);
  border-color:color-mix(in srgb,var(--accent-c) 40%,var(--line))}
.pcard:hover::before{transform:scaleY(1)}
.pcard .no{font-family:Outfit,sans-serif;font-weight:800;font-size:13px;color:var(--accent-c);letter-spacing:.06em}
.pcard .cat{display:inline-block;margin-left:9px;padding:3px 9px;border-radius:999px;font-size:10.5px;
  font-weight:700;letter-spacing:.06em;color:var(--accent-c);
  background:color-mix(in srgb,var(--accent-c) 12%,transparent)}
.pcard h4{margin:12px 0 0;font-size:15.5px;font-weight:700;line-height:1.62;letter-spacing:.005em}
.pcard .chair{margin-top:10px;font-size:12.5px;color:var(--ink-2);line-height:1.7;
  display:block;padding:0;border:0;background:none}
.pcard .chair b{color:var(--ink-1);font-weight:700}
.pcard .foot{margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between}
.pcard .cnt{font-size:11.5px;color:var(--ink-3);letter-spacing:.04em}
.pcard .go{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;color:var(--accent-c)}
.pcard .go svg{transition:transform .26s cubic-bezier(.2,.7,.2,1)}
.pcard:hover .go svg{transform:translateX(4px)}

/* ---------- gallery ---------- */
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gal figure{margin:0;border-radius:var(--radius);overflow:hidden;background:var(--panel);
  border:1px solid var(--line);box-shadow:var(--shadow)}
.gal figure.wide{grid-column:span 2}
.gal .ph{display:block;width:100%;aspect-ratio:3/2;overflow:hidden}
.gal img{width:100%;height:100%;object-fit:cover;display:block;
  transition:transform .6s cubic-bezier(.2,.7,.2,1)}
.gal figure:hover img{transform:scale(1.045)}
.gal figcaption{padding:12px 16px;font-size:12.5px;color:var(--ink-2);border-top:1px solid var(--line)}

/* ==========================================================================
   講演ページ（HTML は v1 のまま）
   ========================================================================== */
.sess-head{position:relative;margin:0 0 26px;padding:26px 26px 24px;border-radius:var(--radius);
  color:#eaf6f5;overflow:hidden;
  background:
    radial-gradient(600px 260px at 88% -20%, rgba(23,130,143,.55), transparent 60%),
    linear-gradient(150deg,var(--teal-900),#0c4750 62%,#0a3238)}
.sess-head::after{content:"";position:absolute;right:-70px;top:-90px;width:280px;height:280px;
  border-radius:50%;border:1px solid rgba(255,255,255,.16);
  box-shadow:0 0 0 26px rgba(255,255,255,.05), 0 0 0 60px rgba(255,255,255,.035);
  pointer-events:none}
.sess-head .kick{position:relative;display:inline-flex;align-items:center;gap:9px;
  font-size:11.5px;letter-spacing:.2em;font-weight:700;color:#7fe3e0;text-transform:none}
.sess-head .kick::before{content:"";width:22px;height:2px;background:var(--coral);border-radius:2px}
.sess-head h2{position:relative;margin:12px 0 0;font-size:clamp(20px,3.1vw,29px);font-weight:900;
  line-height:1.44;letter-spacing:.01em;color:#fff;text-wrap:balance}

.chair{position:relative;display:flex;gap:11px;align-items:flex-start;margin-top:18px;
  padding:13px 15px;border-radius:12px;background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.16);font-size:13.5px;color:#d8ecea}
.chair .role{flex:none;color:var(--teal-900);background:#8fd6d2;border-radius:7px;
  padding:2px 9px;font-size:11.5px;font-weight:800;letter-spacing:.08em;line-height:1.7}
.chair .names{line-height:1.8}
.chair .names strong{color:#fff;font-weight:700}

.group{display:flex;align-items:center;gap:13px;margin:30px 0 10px}
.group span{font-weight:800;font-size:13.5px;color:var(--brand);letter-spacing:.06em;white-space:nowrap;
  padding:3px 12px;border-radius:999px;background:color-mix(in srgb,var(--brand) 11%,transparent)}
.group::after{content:"";height:1px;background:var(--line);flex:1}

.talk{display:flex;gap:16px;align-items:center;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin-bottom:12px;
  box-shadow:var(--shadow);transition:.24s cubic-bezier(.2,.7,.2,1)}
.talk:hover{border-color:color-mix(in srgb,var(--brand) 45%,var(--line));
  transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.play{flex:none;width:54px;height:54px;border-radius:50%;cursor:pointer;border:none;color:#fff;
  display:grid;place-items:center;background:linear-gradient(150deg,var(--teal-700),var(--teal-500));
  box-shadow:0 8px 20px rgba(15,91,100,.35);transition:.24s cubic-bezier(.2,.7,.2,1)}
.play:hover{background:linear-gradient(150deg,var(--coral),#ef7357);
  box-shadow:0 12px 26px rgba(226,86,63,.45);transform:scale(1.07)}
.play svg{margin-left:3px}
.talk .tbody{min-width:0}
.talk .tbody .tt{font-weight:800;font-size:15.5px;line-height:1.5}
.talk .tbody .sp{margin-top:7px;color:var(--ink-2);font-size:13.5px;line-height:1.8}
.talk .tbody .sp strong{color:var(--ink-1);font-weight:700}

/* ---------- info / note / footer ---------- */
.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.info{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow)}
.info .h{display:flex;align-items:center;gap:10px;font-weight:700;font-size:14.5px}
.info .h .ico{width:30px;height:30px;flex:0 0 30px;border-radius:9px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--teal-500) 12%,transparent);color:var(--brand);font-size:14px}
.info p{margin:10px 0 0;color:var(--ink-2);font-size:13.5px}
.note{display:flex;gap:11px;align-items:flex-start;margin-top:16px;padding:15px 18px;border-radius:13px;
  background:color-mix(in srgb,var(--coral) 8%,var(--panel));
  border:1px solid color-mix(in srgb,var(--coral) 26%,transparent);font-size:13.5px}
.note .ico{color:var(--coral);font-size:15px;line-height:1.5}
.fine{color:var(--ink-3);font-size:12.5px;margin-top:12px}
.ft{margin-top:44px;padding-top:20px;border-top:1px solid var(--line);display:flex;
  justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--ink-3);font-size:12px}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.in{opacity:1;transform:none;transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
@media (prefers-reduced-motion:reduce){
  .reveal,.reveal.in{opacity:1;transform:none;transition:none}
  .pcard,.talk,.btn,.gal img{transition:none}
}

/* ---------- responsive ---------- */
@media (max-width:1040px){ .pgrid{grid-template-columns:repeat(2,1fr)} }
@media (max-width:900px){
  .menu-btn{display:block}
  .shell{grid-template-columns:1fr;gap:0}
  .side{position:fixed;left:0;top:0;bottom:0;width:270px;z-index:60;padding:20px;overflow:auto;
    background:var(--panel);border-right:1px solid var(--line);transform:translateX(-100%);transition:.28s}
  .side.open{transform:none}
  .scrim{position:fixed;inset:0;background:rgba(6,20,22,.5);z-index:50;opacity:0;visibility:hidden;transition:.28s}
  .scrim.on{opacity:1;visibility:visible}
  .facts{grid-template-columns:repeat(2,1fr)}
  .hero{padding-top:44px}
  .gal{grid-template-columns:repeat(2,1fr)}
  .gal figure.wide{grid-column:span 2}
}
@media (max-width:620px){
  .pgrid,.info-grid,.gal{grid-template-columns:1fr}
  .gal figure.wide{grid-column:span 1}
  .hero .cta .btn{flex:1 1 100%;justify-content:center}
  .brandtext h1{font-size:12.5px;white-space:normal}
  .sess-head{padding:22px 18px}
  .talk{gap:13px;padding:14px}
  .play{width:48px;height:48px}
}