:root{
  --bg:#F6F0E1; --surface:#FFFBF1; --line:#DDD2B8; --text:#0E2243; --muted:#51607A;
  --navy:#0E2243; --on-navy:#F6F0E1; --track:#E8DFC7;
  --real:#2C7A58; --ai:#B3363A; --unsure:#A87A1F;
  --radius:18px;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0A1730; --surface:#12264A; --line:#2A4170; --text:#F6F0E1; --muted:#A9B5CC;
    --navy:#F6F0E1; --on-navy:#0E2243; --track:#1E345C;
    --real:#58C493; --ai:#FF7A7E; --unsure:#E9B94F;
  }
}
:root[data-theme="dark"]{
  --bg:#0A1730; --surface:#12264A; --line:#2A4170; --text:#F6F0E1; --muted:#A9B5CC;
  --navy:#F6F0E1; --on-navy:#0E2243; --track:#1E345C;
  --real:#58C493; --ai:#FF7A7E; --unsure:#E9B94F;
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Manrope",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3{line-height:1.15;margin:0;letter-spacing:-.02em}
p{margin:0}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
a{color:inherit}
:focus-visible{outline:3px solid var(--unsure);outline-offset:3px;border-radius:6px}

/* header */
header{display:flex;align-items:center;justify-content:space-between;padding:22px 0}
.logo{font-weight:800;font-size:1.35rem;letter-spacing:-.03em;text-decoration:none}
.logo span{background:var(--navy);color:var(--on-navy);padding:2px 8px;border-radius:8px;margin-left:2px}
nav{display:flex;gap:22px;font-size:.95rem;font-weight:500}
nav a{text-decoration:none;color:var(--muted)}
nav a:hover{color:var(--text)}
.demo-pill{font-size:.8rem;font-weight:700;border:1.5px solid var(--unsure);color:var(--unsure);padding:3px 10px;border-radius:99px}

/* hero */
.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;padding:36px 0 64px}
.hero h1{font-size:clamp(2.2rem,5vw,3.6rem);font-weight:800}
.hero p.lead{margin-top:18px;color:var(--muted);font-size:1.1rem;max-width:46ch}
.types{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}
.types span{background:var(--surface);border:1px solid var(--line);padding:8px 14px;border-radius:12px;font-weight:700;font-size:.92rem}

/* upload card */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.drop{border:2px dashed var(--line);border-radius:14px;min-height:230px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:6px;padding:22px;cursor:pointer;transition:border-color .15s,background .15s}
.drop:hover,.drop.over{border-color:var(--navy);background:var(--track)}
.drop svg{width:44px;height:44px;stroke:var(--navy);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;margin-bottom:6px}
.drop strong{font-size:1.1rem}
.drop small{color:var(--muted)}
.preview{display:none;margin-bottom:14px;border-radius:12px;overflow:hidden;background:var(--track);text-align:center}
.preview img,.preview video{display:block;max-width:100%;max-height:260px;margin:0 auto}
.preview audio{width:100%;margin:16px 0}
.fileinfo{display:none;justify-content:space-between;gap:12px;font-size:.92rem;margin-bottom:14px}
.fileinfo b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fileinfo span{color:var(--muted);white-space:nowrap}
button.main{width:100%;border:0;background:var(--navy);color:var(--on-navy);font:inherit;font-weight:700;font-size:1rem;padding:14px;border-radius:12px;cursor:pointer;margin-top:14px;transition:opacity .15s}
button.main:disabled{opacity:.4;cursor:not-allowed}
button.ghost{border:1.5px solid var(--line);background:transparent;color:var(--text);font:inherit;font-weight:700;padding:10px 16px;border-radius:12px;cursor:pointer}
.err{color:var(--ai);font-size:.9rem;margin-top:10px;min-height:1.2em}
.bar{display:none;height:8px;background:var(--track);border-radius:9px;overflow:hidden;margin-top:14px}
.bar i{display:block;height:100%;width:0;background:var(--navy);transition:width .3s}
.step{display:none;font-size:.9rem;color:var(--muted);margin-top:8px}

/* results */
#hasil{display:none;padding:10px 0 56px}
.result{display:grid;grid-template-columns:300px 1fr;gap:22px}
.gauge{text-align:center}
.gauge svg{width:210px;height:210px;transform:rotate(-90deg)}
.gauge .t{fill:none;stroke:var(--track);stroke-width:11}
.gauge .v{fill:none;stroke-width:11;stroke-linecap:round;stroke-dasharray:326.7;stroke-dashoffset:326.7;transition:stroke-dashoffset 1.1s cubic-bezier(.2,.8,.2,1),stroke .3s}
.gauge .num{margin-top:-210px;height:210px;display:flex;flex-direction:column;align-items:center;justify-content:center}
.gauge .num b{font-size:2.8rem;font-weight:800;line-height:1}
.gauge .num small{color:var(--muted);font-size:.8rem;max-width:11ch;line-height:1.3;margin-top:4px}
.verdict{display:inline-block;margin-top:16px;font-weight:800;padding:7px 16px;border-radius:99px;color:#fff}
.result.is-visible .gauge{animation:result-enter .65s cubic-bezier(.2,.8,.2,1) both}
.result.is-visible>div:nth-child(2){animation:result-enter .65s cubic-bezier(.2,.8,.2,1) .1s both}
.result.is-visible .verdict{animation:verdict-enter .45s cubic-bezier(.2,.8,.2,1) .3s both}
.result.is-visible .reasons li{animation:result-enter .45s cubic-bezier(.2,.8,.2,1) .25s both}
.result.is-visible .reasons li:nth-child(2){animation-delay:.33s}
.result.is-visible .reasons li:nth-child(3){animation-delay:.41s}
.result.is-visible .meta{animation:result-enter .5s cubic-bezier(.2,.8,.2,1) .48s both}
@keyframes result-enter{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes verdict-enter{from{opacity:0;transform:translateY(5px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
.v-real{background:var(--real)} .v-ai{background:var(--ai)} .v-unsure{background:var(--unsure)}
:root[data-theme="dark"] .verdict,:root:not([data-theme="light"]) .verdict{color:#0A1730}

.result h2{font-size:1.5rem;margin-bottom:6px}
.result .sum{color:var(--muted);margin-bottom:18px}
.reasons{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.reasons li{display:flex;gap:12px;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.reasons li b{display:block;font-size:.95rem}
.reasons li span{color:var(--muted);font-size:.9rem}
.dot{flex:none;width:10px;height:10px;border-radius:50%;margin-top:8px;background:var(--navy)}
.meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-top:18px}
.meta div{border:1px solid var(--line);border-radius:12px;padding:10px 14px}
.meta small{display:block;color:var(--muted);font-size:.78rem}
.meta b{font-size:.95rem;word-break:break-word}
.note{margin-top:18px;font-size:.85rem;color:var(--muted);border-left:3px solid var(--unsure);padding-left:12px}
.actions{margin-top:18px;display:flex;gap:10px;flex-wrap:wrap}

/* sections */
section.block{padding:56px 0;border-top:1px solid var(--line)}
section.block h2{font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:10px}
section.block>.wrap>p{color:var(--muted);max-width:56ch}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
.grid3 .card h3{font-size:1.1rem;margin-bottom:6px}
.grid3 .card p{color:var(--muted);font-size:.95rem}
.hist{margin-top:22px;display:grid;gap:8px}
.hist .row{display:flex;justify-content:space-between;gap:12px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 14px;font-size:.92rem}
.hist .row em{font-style:normal;font-weight:700}
.hist .empty{color:var(--muted)}
footer{background:var(--navy);color:var(--on-navy);padding:34px 0;margin-top:30px;font-size:.9rem}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer p{max-width:60ch;opacity:.85}
body.has-scroll-reveal [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .85s cubic-bezier(.22,1,.36,1),transform .85s cubic-bezier(.22,1,.36,1)}
body.has-scroll-reveal [data-reveal].is-revealed{opacity:1;transform:translateY(0)}
.who > span:nth-child(2),.grid3 .card:nth-child(2){transition-delay:.06s}
.who > span:nth-child(3),.grid3 .card:nth-child(3){transition-delay:.12s}
.who > span:nth-child(4){transition-delay:.18s}
.who > span:nth-child(5){transition-delay:.24s}

html:root:not([data-theme="none"]){--bg:rgba(255,255,255,.06);--surface:rgba(16,20,56,.58);--line:rgba(246,240,225,.2);--text:#F6F0E1;--muted:#B9BFD8;--navy:#F6F0E1;--on-navy:#0E2243;--track:rgba(255,255,255,.12);--real:#58C493;--ai:#FF7A7E;--unsure:#E9B94F}
body{background:radial-gradient(760px 520px at 2% 0%,rgba(242,217,184,.3),transparent 62%),radial-gradient(1000px 760px at 55% 22%,rgba(123,92,196,.62),transparent 65%),#080E24;background-repeat:no-repeat;background-color:#080E24}
.hero{padding:28px 0 36px}
.hero h1{font-size:clamp(2.4rem,5.4vw,4rem);color:#F6F0E1}
.cta{display:inline-flex;margin-top:28px;background:#0A0F26;color:#F6F0E1;border:1px solid rgba(190,170,255,.55);box-shadow:0 0 22px rgba(139,107,230,.55);padding:13px 26px;border-radius:99px;font-weight:700;text-decoration:none}
.card{backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.orbit{position:relative;width:min(440px,88vw);aspect-ratio:1;margin:0 auto}
.orbit::before{content:"";position:absolute;inset:18%;border-radius:50%;background:radial-gradient(circle,rgba(139,107,230,.45),transparent 70%)}
.ring{position:absolute;border:1px solid rgba(246,240,225,.28);border-radius:50%}
.r1{inset:0}.r2{inset:15%}.r3{inset:31%}
.spin{position:absolute;inset:-1px;border-radius:50%;animation:orb var(--d) linear infinite}
.pos{position:absolute;inset:0;transform:rotate(var(--a))}
.node{position:absolute;top:0;left:50%;width:48px;height:48px;margin:-24px 0 0 -24px;border-radius:15px;background:linear-gradient(145deg,#1B1740,#07091C);border:1px solid rgba(190,170,255,.4);box-shadow:0 0 20px rgba(139,107,230,.55);display:grid;place-items:center;animation:unorb var(--d) linear infinite}
.node svg{width:22px;height:22px;stroke:#D5C8FF;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.center b{font-size:2.8rem;font-weight:800;line-height:1}
.center span{font-size:.85rem;color:var(--muted)}
@keyframes orb{to{transform:rotate(360deg)}}
@keyframes unorb{from{transform:rotate(calc(var(--a)*-1))}to{transform:rotate(calc(var(--a)*-1 - 360deg))}}
@media (prefers-reduced-motion: reduce){.spin,.node{animation:none}.node{transform:rotate(calc(var(--a)*-1))}}
.who{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:22px 0 44px;color:var(--muted);font-weight:700}
.who span{display:inline-flex;align-items:center;gap:8px}
.who svg{width:20px;height:20px;stroke:#C9B8FF;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.uploadwrap{max-width:560px;margin:0 auto 56px;scroll-margin-top:20px}
footer{background:rgba(5,8,24,.55);color:#F6F0E1}
/* tab file / link */
.tabs{display:flex;gap:6px;background:var(--bg);padding:5px;border-radius:14px;margin-bottom:16px}
.tabs button{flex:1;border:0;background:transparent;color:var(--muted);font:inherit;font-weight:700;padding:10px;border-radius:10px;cursor:pointer}
.tabs button[aria-selected="true"]{background:var(--navy);color:var(--on-navy)}
.linkbox{display:grid;gap:10px;min-height:230px;align-content:center}
.linkbox label{font-weight:700}
.linkbox input{width:100%;font:inherit;color:var(--text);background:var(--bg);border:1.5px solid var(--line);border-radius:12px;padding:13px 14px}
.linkbox input:focus{border-color:var(--navy)}
.linkbox small{color:var(--muted)}
.chip{display:none;width:fit-content;font-weight:700;font-size:.85rem;padding:4px 12px;border-radius:99px;background:var(--track)}
.chip.ok{display:inline-block;color:var(--real)}
.chip.bad{display:inline-block;color:var(--ai)}
.hist .row span{min-width:0;overflow-wrap:anywhere}
@media(max-width:860px){
  .hero{grid-template-columns:1fr;gap:30px;padding-top:12px}
  .result{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  nav a{display:none}
}
@media (prefers-reduced-motion: reduce){
  .result.is-visible .gauge,.result.is-visible>div:nth-child(2),.result.is-visible .verdict,
  .result.is-visible .reasons li,.result.is-visible .meta{animation:none}
  body.has-scroll-reveal [data-reveal]{opacity:1;transform:none;transition:none}
}
@media (prefers-reduced-motion: reduce){*{transition:none!important;scroll-behavior:auto!important}}