/* ════════════════════════════════════════════════════════════════
   B·Lo · Blob Morph — 架空会話 AI「SYNCH」
   blob レイヤー2枚（gradient + blur + mix-blend）、
   listening / thinking / speaking 状態でリズム/色が変わる
   ════════════════════════════════════════════════════════════════ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:where(html,body){line-break:strict;word-break:normal;overflow-wrap:break-word}
:where(h1,h2,h3,h4){text-wrap:balance}
:where(p,li){text-wrap:pretty}

:root{
  --bg:#f4f3ee;
  --ink:#0a0a0a;
  --muted:#6a6a6a;
  --line:#d8d6cc;
  --paper:#fff;
  --hi:#ff2d55;
  --alt:#0066ff;
  --vio:#a833ff;
  --font:'DM Sans','Noto Sans JP',sans-serif;
  --serif:'Instrument Serif','DM Sans',serif;
  --mono:'JetBrains Mono',monospace;

  /* ─ SYNCH theme ─ */
  --sy-bg:#0a0a0e;
  --sy-bg-2:#0e0e14;
  --sy-ink:#f4f3ee;
  --sy-dim:rgba(255,255,255,.55);
  --sy-faint:rgba(255,255,255,.10);
  --sy-line:rgba(255,255,255,.08);
}

html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-weight:400;line-height:1.65}
a{color:inherit;text-decoration:none}

/* ─── HEADER ─── */
header.site{
  position:sticky;top:0;z-index:50;background:var(--bg);
  padding:1rem clamp(1.2rem,4vw,3rem);
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  border-bottom:1px solid var(--ink);
}
.back{font-family:var(--mono);font-size:.78rem;letter-spacing:.18em;display:inline-flex;align-items:center;gap:.6em}
.back .arrow{transition:transform .25s}
.back:hover .arrow{transform:translateX(-.3em)}
.cell-marker{font-family:var(--mono);font-size:.78rem;letter-spacing:.22em;color:var(--hi)}

/* ─── intro ─── */
.intro{
  max-width:1200px;margin:0 auto;
  padding:clamp(5rem,12vw,9rem) clamp(1.5rem,4vw,3rem) clamp(2.5rem,7vw,5rem);
}
.kicker{
  display:inline-block;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.32em;color:var(--muted);
  margin-bottom:1.8rem;
}
.intro h1{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(3.4rem,11.5vw,8rem);
  line-height:.96;letter-spacing:-.015em;
}
.intro h1 em{font-style:italic;color:var(--hi)}
.intro .lead{font-size:clamp(1rem,1.25vw,1.15rem);color:var(--muted);max-width:36em;margin-top:1.8rem;line-height:1.95}
.intro .lead strong{color:var(--ink);font-weight:500;border-bottom:1px solid var(--ink)}

/* ════════════════════════════════════════════
   COMPONENT: .synch — Blob Morph + SYNCH product UI
   ════════════════════════════════════════════ */

.synch{
  position:relative;
  margin:0 auto clamp(3rem,6vw,5rem);
  max-width:1440px;
  padding:0 clamp(1rem,3vw,2rem);
}

/* ── SYNCH masthead ── */
.sy-masthead{
  background:var(--sy-bg);color:var(--sy-ink);
  display:flex;align-items:center;justify-content:space-between;gap:1.6rem;
  padding:.95rem clamp(1.2rem,3vw,2.4rem);
  border-bottom:1px solid var(--sy-line);
  font-family:var(--mono);font-size:.7rem;letter-spacing:.22em;
}
.sy-mark{display:inline-flex;align-items:center;gap:.9rem;flex-wrap:wrap}
.sy-glyph{
  position:relative;display:inline-block;width:22px;height:22px;
}
.sy-glyph-d,.sy-glyph-arc{position:absolute;inset:0}
.sy-glyph-d{
  background:var(--hi);border-radius:50%;
  clip-path:polygon(0 0,55% 0,100% 50%,55% 100%,0 100%);
}
.sy-glyph-arc{
  border:1.5px solid #fff;border-radius:50%;
  clip-path:polygon(50% 0,100% 0,100% 100%,50% 100%);
  animation:sy-glyph-spin 6s linear infinite;
}
@keyframes sy-glyph-spin{
  0%  {transform:rotate(0)}
  100%{transform:rotate(360deg)}
}
.sy-name{font-weight:700;letter-spacing:.36em;color:#fff;font-size:.84rem}
.sy-ver{color:var(--sy-dim);letter-spacing:.22em;font-size:.62rem}

.sy-status{display:inline-flex;align-items:center;gap:.85rem;flex-wrap:wrap;color:var(--sy-dim)}
.sy-dot{
  width:8px;height:8px;border-radius:50%;background:#4ade80;
  box-shadow:0 0 8px rgba(74,222,128,.7);
  animation:sy-dot-pulse 2.4s ease-in-out infinite;
  transition:background .35s ease, box-shadow .35s ease, animation-duration .35s ease;
}
@keyframes sy-dot-pulse{
  0%,100%{transform:scale(1);opacity:1}
  50%    {transform:scale(.7);opacity:.6}
}
.synch[data-blob-state="thinking"] .sy-dot{
  background:var(--alt);box-shadow:0 0 10px rgba(0,102,255,.8);
  animation-duration:.9s;
}
.synch[data-blob-state="speaking"] .sy-dot{
  background:var(--hi);box-shadow:0 0 12px rgba(255,45,85,.85);
  animation-duration:1.3s;
}
.sy-state{
  color:#fff;font-weight:500;letter-spacing:.22em;font-size:.68rem;
  font-variant-numeric:tabular-nums;
  min-width:13em;
  transition:color .35s ease;
}
.sy-uptime{color:rgba(255,255,255,.42);font-size:.6rem;letter-spacing:.22em;font-variant-numeric:tabular-nums}

@media(max-width:760px){
  .sy-masthead{flex-direction:column;align-items:flex-start;gap:.7rem}
  .sy-uptime{display:none}
}

/* ── stage（dark, 2-col：blob 左 / text 右） ── */
.sy-stage{
  position:relative;
  background:
    radial-gradient(ellipse 80% 100% at 30% 40%,rgba(255,45,85,.16),transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 80%,rgba(0,102,255,.12),transparent 60%),
    linear-gradient(160deg,var(--sy-bg) 0%,var(--sy-bg-2) 100%);
  color:var(--sy-ink);
  min-height:clamp(620px,82vh,860px);
  display:grid;
  grid-template-columns:1fr;
  gap:0;
  overflow:hidden;
  isolation:isolate;
  padding:clamp(2rem,5vw,4rem) clamp(1.4rem,4vw,3rem);
  cursor:crosshair;
}
@media(min-width:920px){
  .sy-stage{
    grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
    gap:clamp(2rem,4vw,4rem);
    align-items:center;
  }
}

/* ── blob host ── */
.sy-blobs{
  position:relative;
  aspect-ratio:1;
  width:100%;max-width:540px;
  margin:0 auto;
  display:grid;place-items:center;
  isolation:isolate;
}
.sy-blob{
  position:absolute;inset:0;width:100%;height:100%;display:block;
  pointer-events:none;
}
.sy-blob--outer{
  z-index:1;
  filter:drop-shadow(0 24px 80px rgba(255,45,85,.32));
  animation:sy-outer-rot 60s linear infinite;
  transition:filter .55s cubic-bezier(.4,.2,.2,1);
}
@keyframes sy-outer-rot{
  0%  {transform:rotate(0)   scale(1)}
  100%{transform:rotate(360deg) scale(1)}
}
.sy-blob--inner{
  z-index:2;
  transform:scale(.62);
  mix-blend-mode:screen;
  filter:drop-shadow(0 8px 28px rgba(255,255,255,.22));
  transition:transform .9s cubic-bezier(.2,.7,.2,1),
             filter .48s cubic-bezier(.4,.2,.2,1);
}

/* 状態に応じた挙動：listening 穏やか、thinking 乱れ青、speaking 膨張 */
.synch[data-blob-state="listening"] .sy-blob--outer{
  filter:drop-shadow(0 24px 80px rgba(255,45,85,.28)) hue-rotate(0deg);
}
.synch[data-blob-state="thinking"] .sy-blob--outer{
  filter:drop-shadow(0 24px 100px rgba(0,102,255,.36)) hue-rotate(-160deg) saturate(1.1);
  animation-duration:24s;
}
.synch[data-blob-state="speaking"] .sy-blob--outer{
  filter:drop-shadow(0 30px 110px rgba(255,45,85,.55)) hue-rotate(0deg) saturate(1.15) brightness(1.05);
}
.synch[data-blob-state="speaking"] .sy-blob--inner{
  transform:scale(.72);
  transition:transform .9s cubic-bezier(.2,.7,.2,1);
}
.synch[data-blob-state="listening"] .sy-blob--inner,
.synch[data-blob-state="thinking"] .sy-blob--inner{
  transform:scale(.62);
  transition:transform .9s cubic-bezier(.2,.7,.2,1);
}

/* 中央の state ピル（blob の中に重ねる） */
.sy-statepill{
  position:relative;z-index:3;
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--mono);font-size:.6rem;letter-spacing:.32em;
  color:rgba(255,255,255,.85);
  background:rgba(0,0,0,.32);padding:.45em .8em;
  border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(6px);
  text-transform:uppercase;
  transform:translateY(28%);
}
.sp-bar{
  display:inline-block;width:18px;height:1px;background:var(--hi);
  position:relative;
  transition:background .35s ease;
}
.sp-bar::after{
  content:"";position:absolute;left:0;top:-1px;width:6px;height:3px;background:var(--hi);
  animation:sp-bar-run 1.8s cubic-bezier(.4,.0,.6,1) infinite;
  transition:background .35s ease, box-shadow .35s ease, animation-duration .35s ease;
}
@keyframes sp-bar-run{
  0%  {transform:translateX(0)}
  100%{transform:translateX(12px)}
}
.synch[data-blob-state="thinking"] .sp-bar{background:var(--alt)}
.synch[data-blob-state="thinking"] .sp-bar::after{
  background:var(--alt);box-shadow:0 0 6px rgba(0,102,255,.7);
  animation-duration:.7s;
}
.synch[data-blob-state="speaking"] .sp-bar::after{
  box-shadow:0 0 8px rgba(255,45,85,.85);
  animation-duration:1.1s;
}

/* ── text panel ── */
.sy-text{
  display:flex;flex-direction:column;gap:1.2rem;min-width:0;
  padding:0 .2rem;
}
.sy-h{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(2.4rem,5.8vw,4.8rem);
  line-height:.98;letter-spacing:-.015em;color:#fff;
  text-wrap:balance;
}
.sy-h em{font-style:italic;color:var(--hi)}
.sy-lead{
  font-size:.96rem;line-height:1.85;color:rgba(255,255,255,.75);
  max-width:38em;margin-top:.2rem;
}

.sy-cta{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:.4rem}
.cta{
  position:relative;display:inline-flex;align-items:center;gap:.6em;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.24em;font-weight:500;
  color:rgba(255,255,255,.95);
  background:transparent;border:1px solid rgba(255,255,255,.32);
  padding:.95em 1.4em;cursor:pointer;overflow:hidden;
  transition:color .25s ease,border-color .25s ease,transform .35s cubic-bezier(.2,.7,.2,1);
}
.cta::before{
  content:"";position:absolute;inset:0;background:#fff;
  transform:translateX(-101%);
  transition:transform .42s cubic-bezier(.7,0,.2,1);
}
.cta > *{position:relative;z-index:1}
.cta:hover{color:#0a0a0a;border-color:#fff}
.cta:hover::before{transform:translateX(0)}
.cta-arrow{transition:transform .35s cubic-bezier(.2,.7,.2,1)}
.cta:hover .cta-arrow{transform:translateX(.3em)}
.cta--solid{background:#fff;color:#0a0a0a;border-color:#fff}
.cta--solid::before{background:var(--hi)}
.cta--solid:hover{color:#fff}

/* metrics row */
.sy-metrics{
  list-style:none;
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:.4rem .8rem;margin-top:.8rem;
  border-top:1px solid var(--sy-line);
  padding-top:1rem;
}
@media(min-width:480px){.sy-metrics{grid-template-columns:repeat(4,minmax(0,1fr))}}
.sy-metrics li{display:flex;flex-direction:column;gap:.2rem}
.sy-metrics strong{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(1.4rem,2.2vw,1.95rem);
  line-height:1;color:#fff;font-variant-numeric:tabular-nums;
}
.sy-metrics strong i{font-style:normal;font-family:var(--mono);font-size:.55em;color:var(--hi);margin-left:.1em;font-weight:500}
.sy-metrics span{font-family:var(--mono);font-size:.58rem;letter-spacing:.24em;color:rgba(255,255,255,.42)}

/* ════════════════════════════════════════════
   会話パネル（自動循環）
   ════════════════════════════════════════════ */
.sy-chat{
  position:relative;z-index:2;
  background:var(--sy-bg-2);color:var(--sy-ink);
  border-top:1px solid var(--sy-line);
  display:grid;
  grid-template-rows:auto 1fr auto;
}
.sy-chat-head{
  display:flex;justify-content:space-between;align-items:center;gap:1rem;
  padding:.95rem clamp(1.2rem,3vw,2.4rem);
  border-bottom:1px solid var(--sy-line);
  font-family:var(--mono);font-size:.62rem;letter-spacing:.28em;color:var(--sy-dim);
}
.sy-chat-title{color:rgba(255,255,255,.85);font-weight:700}
.sy-chat-meta{display:inline-flex;align-items:center;gap:.7rem;color:#fff}
.sy-chat-tick{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--hi);
  animation:sy-tick-pulse 1.2s ease-in-out infinite;
}
@keyframes sy-tick-pulse{
  0%,100%{opacity:1;transform:scale(1)}
  50%    {opacity:.4;transform:scale(.7)}
}

.sy-chat-body{
  position:relative;
  display:grid;
  padding:clamp(1.4rem,3vw,2.4rem) clamp(1.2rem,3vw,2.4rem);
  min-height:280px;
}
.turn{
  grid-column:1;grid-row:1;
  display:flex;flex-direction:column;gap:1.1rem;max-width:760px;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .35s ease, visibility 0s linear .35s;
}
.turn.is-active{
  opacity:1;visibility:visible;pointer-events:auto;
  transition:opacity .5s ease;
}
.msg{
  position:relative;font-size:1.05rem;line-height:1.7;
  padding-left:5rem;color:rgba(255,255,255,.92);
}
.msg-who{
  position:absolute;left:0;top:.2em;
  font-family:var(--mono);font-size:.58rem;letter-spacing:.32em;
  color:rgba(255,255,255,.4);font-weight:500;
}
.msg--user{color:rgba(255,255,255,.62)}
.msg--user .msg-who{color:rgba(255,255,255,.32)}
.msg--ai{
  font-family:var(--serif);font-size:1.45rem;line-height:1.45;
  color:#fff;font-style:italic;font-weight:400;
}
.msg--ai .msg-who{
  color:var(--hi);font-style:normal;
}

/* 各メッセージは少し遅れて表れる */
.turn.is-active .msg--user{
  animation:msg-up .55s cubic-bezier(.2,.7,.2,1) both;
}
.turn.is-active .msg--ai{
  animation:msg-up .65s cubic-bezier(.2,.7,.2,1) .35s both;
}
@keyframes msg-up{
  0%  {opacity:0;transform:translateY(.6em)}
  100%{opacity:1;transform:none}
}

/* typing インジケータ（thinking 中だけ表示） */
.sy-typing{
  grid-column:1;grid-row:1;
  align-self:end;
  display:inline-flex;align-items:center;gap:.6rem;
  padding-left:5rem;
  font-family:var(--mono);font-size:.62rem;letter-spacing:.24em;
  color:rgba(255,255,255,.55);
  opacity:0;visibility:hidden;
  transition:opacity .25s ease, visibility 0s linear .25s;
}
.sy-chat[data-thinking="true"] .sy-typing{
  opacity:1;visibility:visible;transition:opacity .25s ease;
}
.ty-who{color:var(--hi);font-weight:500}
.ty-dots{display:inline-flex;gap:.25rem}
.ty-dots i{
  width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.55);
  animation:ty-bounce 1.1s ease-in-out infinite;
}
.ty-dots i:nth-child(2){animation-delay:.18s}
.ty-dots i:nth-child(3){animation-delay:.36s}
@keyframes ty-bounce{
  0%,100%{transform:translateY(0);  opacity:.5}
  40%    {transform:translateY(-3px);opacity:1}
}

.sy-chat-foot{
  display:flex;justify-content:space-between;align-items:center;gap:.8rem;
  padding:.85rem clamp(1.2rem,3vw,2.4rem);
  border-top:1px solid var(--sy-line);
  font-family:var(--mono);font-size:.6rem;letter-spacing:.26em;color:rgba(255,255,255,.4);
}
.sy-chat-progress{
  flex:1;height:1px;background:var(--sy-faint);position:relative;overflow:hidden;
  margin:0 1rem;max-width:400px;
}
.sy-chat-progress i{
  position:absolute;left:0;top:0;height:100%;background:var(--hi);
  width:0%;
  transition:width .12s linear;
}
.sy-chat-skip{
  background:transparent;border:1px solid rgba(255,255,255,.18);
  color:rgba(255,255,255,.75);
  font-family:var(--mono);font-size:.6rem;letter-spacing:.28em;
  padding:.5em .9em;cursor:pointer;
  transition:background .2s,color .2s,border-color .2s;
}
.sy-chat-skip:hover{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.4)}

@media(max-width:680px){
  .msg{padding-left:0;display:flex;flex-direction:column;gap:.2rem}
  .msg-who{position:static;display:block}
  .msg--ai{font-size:1.15rem}
  .sy-typing{padding-left:0}
}

/* ── stage 下部 footer ── */
.sy-foot{
  background:var(--sy-bg);color:var(--sy-dim);
  display:flex;justify-content:space-between;align-items:center;gap:1rem;
  padding:.85rem clamp(1.2rem,3vw,2.4rem);
  border-top:1px solid var(--sy-line);
  font-family:var(--mono);font-size:.6rem;letter-spacing:.26em;
}
.sy-foot em{font-style:normal;color:#4ade80;letter-spacing:.22em}

/* ════════════ reduced motion ════════════ */
@media (prefers-reduced-motion: reduce){
  .sy-blob--outer{animation:none}
  .sy-dot,.sp-bar::after,.sy-glyph-arc,.sy-chat-tick,.ty-dots i{animation:none}
  .turn.is-active .msg--user,
  .turn.is-active .msg--ai{animation:none;opacity:1;transform:none}
}

/* END COMPONENT */


/* ─── NOTES ─── */
.notes{max-width:1100px;margin:0 auto;padding:clamp(3rem,6vw,5rem) clamp(1.5rem,4vw,3rem)}
.shou{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding-bottom:1rem;border-bottom:1px solid var(--ink);margin-bottom:2.5rem}
.shou h2{font-size:clamp(1.3rem,2vw,1.7rem);font-weight:700;letter-spacing:.04em}
.shou .no{font-family:var(--mono);font-size:.78rem;letter-spacing:.25em;color:var(--muted)}
.frame{font-size:.92rem;line-height:1.9;color:var(--muted);max-width:46em;margin:-1rem 0 2rem;padding:1rem 1.2rem;border-left:3px solid var(--hi);background:var(--paper)}
.frame code{font-family:var(--mono);font-size:.88em;background:var(--bg);padding:.1em .35em;border:1px solid var(--line)}
.notes-grid{display:grid;grid-template-columns:1fr;gap:1.2rem;margin-bottom:3rem}
@media(min-width:780px){.notes-grid{grid-template-columns:repeat(3,1fr)}}
.note{position:relative;background:var(--paper);border:1px solid var(--ink);padding:1.5rem 1.4rem 1.4rem}
.note-no{position:absolute;top:1rem;right:1rem;font-family:var(--mono);font-size:.7rem;letter-spacing:.2em;color:var(--muted)}
.note h3{font-size:1.02rem;font-weight:700;margin-bottom:.7rem;letter-spacing:.02em}
.note p{font-size:.86rem;color:var(--muted);line-height:1.8}
.note code,.var span code{font-family:var(--mono);font-size:.85em;background:var(--bg);padding:.1em .35em;border:1px solid var(--line)}
.sub-h{font-size:1rem;font-weight:700;letter-spacing:.04em;margin:2rem 0 1rem;padding-bottom:.7rem;border-bottom:1px dashed var(--ink)}
.vars{display:grid;grid-template-columns:1fr;gap:0;border:1px solid var(--ink);background:var(--paper)}
.var{display:grid;grid-template-columns:minmax(8rem,auto) 1fr auto;gap:1rem;padding:.8rem 1rem;border-bottom:1px solid var(--line);align-items:center}
.var:last-child{border-bottom:none}
.var code{font-family:var(--mono);font-size:.82rem;color:var(--hi);font-weight:500}
.var span{font-size:.85rem;color:var(--muted);line-height:1.5}
.var em{font-family:var(--mono);font-size:.78rem;font-style:normal;color:var(--ink);background:var(--bg);padding:.15em .55em;border:1px solid var(--line);white-space:nowrap}
@media(max-width:680px){.var{grid-template-columns:1fr;gap:.3rem;padding:.9rem 1rem}.var em{justify-self:start}}
.a11y{list-style:none;display:grid;gap:.6rem;background:var(--paper);border:1px solid var(--ink);padding:1rem 1.2rem;margin-top:1rem}
.a11y li{position:relative;padding-left:1.2em;font-size:.88rem;line-height:1.75;color:var(--muted)}
.a11y li::before{content:"→";position:absolute;left:0;top:0;color:var(--hi);font-family:var(--mono)}
.a11y code{font-family:var(--mono);font-size:.85em;background:var(--bg);padding:.1em .35em;border:1px solid var(--line)}

/* ─── FOOTER ─── */
footer{
  padding:2rem clamp(1.2rem,4vw,3rem) 1.5rem;
  display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:center;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;color:var(--muted);
  border-top:1px solid var(--ink);
}
footer a{color:var(--ink)}