:root{
  --paper:#F5F1E8; --card:#FFFDF8; --ink:#16181F; --ink-2:#3A3D4A; --mute:#6F7280;
  --line:rgba(22,24,31,.13); --accent:#FF5B2E; --accent-ink:#C93A12; --blue:#2B45FF; --ok:#1B7F4B; --warn:#9A5B00;
  --r:14px; --shadow:0 20px 50px -28px rgba(22,24,31,.45);
  --display:'Rubik','Heebo',system-ui,sans-serif; --text:'Heebo',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--text);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
.wrap{width:min(1180px,100% - 32px);margin-inline:auto}
.muted{color:var(--mute);font-size:.9rem}
a{color:inherit}
h1,h2,h3{font-family:var(--display);line-height:1.15;margin:0;text-wrap:balance}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:6px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:10px 18px;border-radius:999px;border:1.5px solid var(--ink);background:transparent;color:var(--ink);font:600 1rem/1 var(--text);text-decoration:none;cursor:pointer;transition:transform .15s,background .15s,color .15s}
.btn:active{transform:scale(.97)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent-ink);border-color:var(--accent-ink)}
.btn.ghost:hover{background:var(--ink);color:var(--paper)}
.btn.small{min-height:36px;padding:6px 14px;font-size:.9rem}
.btn.big{min-height:54px;padding:14px 28px;font-size:1.1rem}

/* ---------- header / hero ---------- */
.top{position:sticky;top:0;z-index:10;background:rgba(22,24,31,.92);backdrop-filter:blur(8px);color:var(--paper)}
.top-in{display:flex;align-items:center;justify-content:space-between;height:60px}
.top .btn{border-color:rgba(245,241,232,.4);color:var(--paper)}
.top .btn:hover{background:var(--paper);color:var(--ink)}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--display);font-weight:800;font-size:1.1rem}
.brand-mark{width:22px;height:16px;border-radius:3px;background:var(--accent);box-shadow:5px -5px 0 -1px var(--paper)}
.hero{background:var(--ink);color:var(--paper);overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:72px 0 88px}
.eyebrow{font-weight:700;color:var(--accent);letter-spacing:.02em;margin:0 0 14px}
.hero h1{font-size:clamp(2rem,4.4vw,3.4rem);font-weight:800}
.hero h1 em{font-style:normal;color:#FFD9CC}
.lead{font-size:1.12rem;color:rgba(245,241,232,.78);max-width:58ch;margin:22px 0 30px}
.hero-cta{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.hero .muted{color:rgba(245,241,232,.6)}

.hero-art{position:relative;aspect-ratio:16/11}
.sheet{position:absolute;inset:0;border-radius:16px;background:#23262F;border:1px solid rgba(255,255,255,.08)}
.s3{transform:translate(-26px,-26px) rotate(-4deg);opacity:.5}
.s2{transform:translate(-13px,-13px) rotate(-2deg);opacity:.75}
.s1{background:var(--paper);color:var(--ink);padding:7% 7% 0;display:flex;flex-direction:column;gap:5%;box-shadow:0 30px 60px -20px rgba(0,0,0,.6);animation:float 6s ease-in-out infinite}
.s-bar{display:flex;gap:6px}.s-bar i{width:9px;height:9px;border-radius:50%;background:var(--line)}
.s-title{height:9%;width:78%;border-radius:6px;background:var(--ink)}
.s-sub{height:4%;width:52%;border-radius:4px;background:var(--line)}
.s-chart{flex:1;display:flex;align-items:flex-end;gap:6%;padding-inline:4%}
.s-chart b{flex:1;height:var(--h);border-radius:6px 6px 0 0;background:var(--blue);transform-origin:bottom;animation:grow 3.6s ease-in-out infinite}
.s-chart b:nth-child(4){background:var(--accent)}
.s-chart b:nth-child(2){animation-delay:.15s}.s-chart b:nth-child(3){animation-delay:.3s}.s-chart b:nth-child(4){animation-delay:.45s}
.s-decide{display:flex;gap:6px;flex-wrap:wrap;font-size:clamp(.6rem,1.1vw,.8rem)}
.s-decide span{padding:3px 10px;border-radius:999px;border:1px solid var(--line)}
.s-decide .on{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.s-ui{display:flex;align-items:center;gap:10px;margin:0 -8%;padding:8px 8%;border-top:1px solid var(--line);font-size:clamp(.6rem,1.1vw,.8rem);color:var(--mute)}
.s-ui .note{margin-inline-start:auto;color:var(--accent-ink);font-weight:700}
@keyframes grow{0%,100%{transform:scaleY(.55)}50%{transform:scaleY(1)}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

.how{border-bottom:1px solid var(--line)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.how-i{padding:34px 28px;border-inline-start:1px solid var(--line)}
.how-i:first-child{border-inline-start:0;padding-inline-start:0}
.how-i b{font-family:var(--display);font-size:2rem;color:var(--accent)}
.how-i h3{font-size:1.2rem;margin:4px 0 6px}
.how-i p{margin:0;color:var(--ink-2)}

/* ---------- studio ---------- */
.studio{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:32px;align-items:start;padding:56px 0 80px}
.brief{display:grid;gap:22px}
fieldset{margin:0;border:1px solid var(--line);border-radius:var(--r);background:var(--card);padding:22px 22px 8px;min-width:0}
legend{font-family:var(--display);font-weight:800;font-size:1.2rem;padding:0 8px;margin-inline-start:-8px}
legend span{color:var(--accent);margin-inline-end:6px;font-size:.95rem}
.f{display:grid;gap:6px;margin-bottom:16px;min-width:0}
.f2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
label,.label{font-weight:600;font-size:.95rem}
.opt{font-weight:400;color:var(--mute);font-size:.82rem;margin-inline-start:4px}
input,select,textarea{width:100%;font:inherit;font-size:1rem;color:var(--ink);background:var(--paper);border:1.5px solid var(--line);border-radius:10px;padding:11px 12px;transition:border-color .15s,background .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue);background:#fff}
input[aria-invalid="true"]{border-color:var(--accent)}
textarea{resize:vertical;min-height:70px}
.hint{margin:0;color:var(--mute);font-size:.85rem}
.check{display:flex;align-items:center;gap:10px;margin-bottom:14px;cursor:pointer;font-weight:500}
.check input{width:20px;height:20px;accent-color:var(--accent);flex:none}

.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip,.seg button{min-height:40px;padding:8px 14px;border-radius:999px;border:1.5px solid var(--line);background:var(--paper);font:500 .92rem var(--text);color:var(--ink);cursor:pointer;transition:background .15s,border-color .15s,color .15s}
.chip:hover,.seg button:hover{border-color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}

.drop{display:grid;gap:4px;place-items:center;text-align:center;padding:22px;border:1.5px dashed rgba(22,24,31,.3);border-radius:12px;background:var(--paper);cursor:pointer;font-weight:500;transition:background .15s,border-color .15s}
.drop.over,.drop:hover{border-color:var(--blue);background:#EEF0FF}
.drop input{position:absolute;width:1px;height:1px;opacity:0}
.drop small{color:var(--mute);font-weight:400;max-width:48ch}
.files{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.files li{display:flex;align-items:center;gap:8px;padding:6px 10px;border-radius:10px;background:var(--paper);font-size:.9rem}
.files .fn{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tag{flex:none;font-size:.78rem;font-weight:600;padding:2px 9px;border-radius:999px}
.tag.in{background:#DDF3E6;color:var(--ok)}.tag.man{background:#FCEBD0;color:var(--warn)}
.x{flex:none;width:32px;height:32px;border:0;border-radius:8px;background:transparent;cursor:pointer;color:var(--mute)}
.x:hover{background:var(--line);color:var(--ink)}

.actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}

/* ---------- output ---------- */
.out{position:sticky;top:84px;border-radius:var(--r);background:var(--ink);color:var(--paper);padding:26px;box-shadow:var(--shadow);min-width:0}
.out h2{font-size:1.35rem}
.out-empty p{color:rgba(245,241,232,.7)}
.incl{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px}
.incl li{display:flex;gap:10px;color:rgba(245,241,232,.86)}
.incl li::before{content:"";flex:none;width:8px;height:8px;margin-top:.55em;border-radius:2px;background:var(--accent)}
.out-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:12px}
.out .muted{color:rgba(245,241,232,.6)}
#prompt{height:min(52vh,520px);background:#0E1015;color:#E8E4DA;border-color:rgba(255,255,255,.12);font:400 .8rem/1.55 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;resize:vertical}
#prompt:focus{background:#0E1015;border-color:var(--accent)}
.out-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.out .btn.ghost{border-color:rgba(245,241,232,.4);color:var(--paper)}
.out .btn.ghost:hover{background:var(--paper);color:var(--ink)}
.warn{margin:0 0 10px;padding:10px 12px;border-radius:10px;background:rgba(255,91,46,.14);color:#FFD9CC;font-size:.9rem}
.next{margin:18px 0 0;padding-inline-start:20px;color:rgba(245,241,232,.8);font-size:.93rem;display:grid;gap:4px}

.foot{border-top:1px solid var(--line);padding:22px 0}
.foot-in{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-weight:600}

@media (max-width:980px){
  .hero-in{grid-template-columns:1fr;padding:48px 0 60px}
  .hero-art{max-width:460px;width:90%;margin-inline:auto}
  .studio{grid-template-columns:1fr}
  .out{position:static}
}
@media (max-width:640px){
  .grid3{grid-template-columns:1fr}
  .how-i{border-inline-start:0;border-top:1px solid var(--line);padding:22px 0}
  .how-i:first-child{border-top:0}
  .f2{grid-template-columns:1fr;gap:0}
  fieldset{padding:18px 16px 4px}
  .actions .btn.big{width:100%}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}