/* ============================================================
   Subtitle with Script — /sub-title
   Theme: near-black + violet, matching /photo-edit
   ============================================================ */
:root{
  --bg:#0A0510; --bg-2:#0E0718; --panel:#150B24; --panel-2:#1B0F2E;
  --line:rgba(167,139,250,.14); --line-str:rgba(167,139,250,.28);
  --violet:#8B5CF6; --violet-lt:#A78BFA; --violet-dk:#5B3F9E; --violet-cta:#7C3AED;
  --amber:#F59E0B; --red:#EF4444; --green:#34D399;
  --ink:#F5F2FF; --muted:#B7ADCB; --muted-2:#8A7FA3;
  --radius:18px; --maxw:1160px;
  --shadow:0 24px 60px -24px rgba(0,0,0,.8);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; font-family:"Prompt",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg); color:var(--ink); line-height:1.6;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:"Sora","Prompt",sans-serif;letter-spacing:-.02em;line-height:1.15;margin:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,5,16,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:.85rem 1.25rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{display:inline-flex;align-items:center;gap:.6rem;font-family:"Sora","Prompt",sans-serif;font-weight:700;letter-spacing:-.02em}
.brand-glyph{width:30px;height:30px;flex:none}
.brand-accent{color:var(--violet-lt)}
.nav-links{display:flex;align-items:center;gap:1.4rem;font-size:.9rem}
.nav-link{color:var(--muted)}
.nav-link:hover{color:var(--ink)}
.nav-back{color:var(--muted-2);font-size:.85rem}
.nav-cta{background:var(--violet-cta);color:#fff;padding:.42rem .95rem;border-radius:999px;font-weight:600;font-size:.85rem}
@media(max-width:820px){.nav-links .nav-link{display:none}}
@media(max-width:560px){
  .nav-inner{padding:.7rem 1rem}
  .brand-text{font-size:.92rem;white-space:nowrap}
  .nav-back{display:none}
}

/* ---------- hero ---------- */
.hero{position:relative;padding:4.5rem 1.25rem 2.5rem;overflow:hidden}
.hero-glow{position:absolute;inset:-30% 20% auto;height:520px;background:radial-gradient(closest-side,rgba(139,92,246,.30),transparent 70%);filter:blur(30px);pointer-events:none}
.hero-inner{position:relative;max-width:var(--maxw);margin:0 auto}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;margin:0 0 1.1rem;
  font-family:"Sora","Prompt",sans-serif;font-size:.72rem;font-weight:600;letter-spacing:.16em;
  text-transform:uppercase;color:var(--violet-lt);
  border:1px solid var(--line-str);border-radius:999px;padding:.34rem .85rem;background:rgba(139,92,246,.07)
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--violet-lt);box-shadow:0 0 10px var(--violet-lt)}
h1{font-size:clamp(2.1rem,5.6vw,3.9rem);font-weight:800}
.chrome{
  background:linear-gradient(175deg,#fff 8%,#CFC6E8 38%,#8E82AE 58%,#F2EDFF 82%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lede{max-width:60ch;margin:1.15rem 0 0;color:var(--muted);font-size:1.06rem}
.hero-facts{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:1.6rem}
.fact{font-size:.82rem;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:.35rem .8rem;background:rgba(255,255,255,.02)}
.fact b{color:var(--ink);font-weight:600}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.25rem}
section{scroll-margin-top:80px}
.panel{background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.tool{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:1.25rem;margin:2rem 0 3rem}
@media(max-width:960px){.tool{grid-template-columns:1fr}}
.pad{padding:1.35rem}
.card-title{font-family:"Sora","Prompt",sans-serif;font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--violet-lt);margin:0 0 .9rem}

/* ---------- drop zone ---------- */
.drop{
  border:1.5px dashed var(--line-str);border-radius:14px;padding:1.6rem 1.1rem;text-align:center;
  background:rgba(139,92,246,.045);cursor:pointer;transition:border-color .18s,background .18s
}
.drop:hover,.drop.over{border-color:var(--violet-lt);background:rgba(139,92,246,.11)}
.drop strong{display:block;font-family:"Sora","Prompt",sans-serif;font-size:.98rem;margin-bottom:.25rem}
.drop span{font-size:.83rem;color:var(--muted-2)}
.drop.filled{border-style:solid;border-color:var(--violet-dk);text-align:left}

textarea,input[type=text],select{
  width:100%;background:rgba(0,0,0,.32);color:var(--ink);
  border:1px solid var(--line);border-radius:12px;padding:.75rem .85rem;
  font-family:inherit;font-size:.92rem;line-height:1.7;resize:vertical
}
textarea:focus,select:focus{outline:none;border-color:var(--violet-lt)}
textarea{min-height:170px}
label.fieldlabel{display:block;font-size:.85rem;color:var(--muted);margin:1.1rem 0 .45rem}
.hint{font-size:.78rem;color:var(--muted-2);margin:.45rem 0 0}

.row{display:flex;gap:.7rem;flex-wrap:wrap;align-items:center}
.row>*{flex:none}

button{font-family:inherit;cursor:pointer;border:none;border-radius:999px;font-weight:600}
.btn-primary{background:var(--violet-cta);color:#fff;padding:.72rem 1.5rem;font-size:.96rem}
.btn-primary:disabled{background:#3A2A55;color:var(--muted-2);cursor:not-allowed}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line-str);padding:.55rem 1.05rem;font-size:.86rem}
.btn-ghost:hover{border-color:var(--violet-lt)}

/* ---------- progress ---------- */
.status{margin-top:1.1rem;font-size:.88rem;color:var(--muted);min-height:1.4em}
.status.err{color:#FCA5A5}
.status.ok{color:var(--green)}
.bar{height:5px;border-radius:999px;background:rgba(255,255,255,.07);overflow:hidden;margin-top:.6rem}
.bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--violet-dk),var(--violet-lt));transition:width .25s}

/* ---------- preview ---------- */
.stage{position:relative;background:#000;border-radius:14px;overflow:hidden;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center}
.stage video{width:100%;height:100%;object-fit:contain;display:block}
.stage video[hidden]{display:none}
.stage .empty{color:var(--muted-2);font-size:.88rem;padding:2rem;text-align:center}
.caption{
  position:absolute;left:5%;right:5%;bottom:9%;text-align:center;pointer-events:none;
  font-family:"Sarabun","Prompt",sans-serif;font-weight:600;line-height:1.35;white-space:pre-line;
}

/* ---------- style controls ---------- */
.controls{display:grid;grid-template-columns:repeat(auto-fit,minmax(128px,1fr));gap:.85rem;margin-top:1.1rem}
.ctl label{display:block;font-size:.76rem;color:var(--muted-2);margin-bottom:.3rem}
.ctl input[type=range]{width:100%;accent-color:var(--violet-lt)}
.ctl input[type=color]{width:100%;height:34px;background:transparent;border:1px solid var(--line);border-radius:8px;padding:2px;cursor:pointer}

/* ---------- cue list ---------- */
.cues{margin-top:1.1rem;max-height:260px;overflow:auto;border:1px solid var(--line);border-radius:12px}
.cue{display:grid;grid-template-columns:auto 1fr;gap:.75rem;padding:.5rem .8rem;font-size:.85rem;border-bottom:1px solid rgba(255,255,255,.04);cursor:pointer}
.cue:last-child{border-bottom:none}
.cue:hover{background:rgba(139,92,246,.09)}
.cue.active{background:rgba(139,92,246,.16)}
.cue time{color:var(--violet-lt);font-variant-numeric:tabular-nums;font-size:.8rem}

/* ---------- info blocks ---------- */
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1rem;margin:1.4rem 0 0}
.info h3{font-size:1.02rem;margin-bottom:.4rem}
.info p{margin:0;color:var(--muted);font-size:.9rem}
.note{border-left:2px solid var(--amber);padding:.55rem 0 .55rem .9rem;color:var(--muted);font-size:.9rem;margin:1.2rem 0 0}
.note b{color:var(--ink)}
h2.sec{font-size:clamp(1.5rem,3.2vw,2.1rem);font-weight:800;margin-top:3.2rem}
.sec-lede{color:var(--muted);max-width:65ch;margin:.7rem 0 0}
ul.plain{color:var(--muted);font-size:.92rem;padding-left:1.1rem;margin:.8rem 0 0}
ul.plain li{margin:.35rem 0}
ul.plain b{color:var(--ink)}

.foot{border-top:1px solid var(--line);margin-top:4rem;padding:2.4rem clamp(1.1rem,4vw,2rem);text-align:center}
.foot-inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.foot-brand{font-family:"Sora","Prompt",sans-serif;font-weight:700;font-size:1.1rem;margin:0}
.foot-links{display:flex;gap:1.4rem;font-size:.9rem}
.foot-links a{color:var(--muted)}
.foot-links a:hover{color:var(--violet-lt)}
.foot-credit{max-width:var(--maxw);margin:1.6rem auto 0;color:var(--muted-2);font-size:.85rem}
.foot-bp{color:#F59E0B;font-weight:600}
.foot-badge{display:block;margin:12px auto 0;height:22px;width:auto;opacity:.9}

/* ---------- gpu toggle ---------- */
.toggle{display:flex;align-items:flex-start;gap:.6rem;margin-top:.75rem;font-size:.82rem;color:var(--muted);cursor:pointer}
.toggle input{margin:.2rem 0 0;accent-color:var(--violet-lt);flex:none}
.toggle:hover{color:var(--ink)}