/* ============================================================
   BytePeek — design tokens
   Porselin dingin + amber terminal. Archivo / JetBrains Mono.
   ============================================================ */
:root{
  --bg:#F4F5F2;
  --surface:#FDFDFA;
  --ink:#1B1F1E;
  --muted:#5A6360;
  --line:#E1E4DE;
  --amber:#E8A013;
  --amber-deep:#C4870B;
  --amber-soft:rgba(232,160,19,.14);
  --terminal-bg:#14171A;
  --terminal-ink:#E9ECEF;
  --terminal-dim:#8B949E;
  --ok:#3E9257;
  --err:#C0392B;
  --radius:16px;
  --radius-sm:10px;
  --shadow-rest:0 1px 2px rgba(27,31,30,.06),0 8px 28px rgba(27,31,30,.07);
  --shadow-lift:0 2px 6px rgba(27,31,30,.08),0 18px 50px rgba(27,31,30,.12);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
body{
  font-family:'Archivo',system-ui,-apple-system,sans-serif;
  background:
    radial-gradient(1100px 500px at 85% -10%, var(--amber-soft), transparent 60%),
    var(--bg);
  color:var(--ink);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
.mono{font-family:'JetBrains Mono',ui-monospace,monospace}
.wrap{max-width:1160px;margin-inline:auto;padding-inline:24px}
.dim{opacity:.55}
.grow{flex:1}

::selection{background:var(--amber);color:#14171A}

/* ---------- focus ---------- */
:focus-visible{outline:2px solid var(--amber-deep);outline-offset:2px;border-radius:4px}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-in{opacity:1;transform:none}

/* ============================================================
   Buttons & controls
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font:600 15px/1 'Archivo',sans-serif;
  padding:13px 22px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
  white-space:nowrap;text-decoration:none;color:var(--ink);
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:#000;box-shadow:var(--shadow-lift)}
.btn-outline{border-color:var(--ink);background:transparent}
.btn-outline:hover{background:var(--ink);color:#fff}
.btn-ghost{color:var(--muted)}
.btn-ghost:hover{color:var(--ink);background:rgba(27,31,30,.05)}
.btn-sm{padding:9px 16px;font-size:14px}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;
  border-radius:10px;border:1px solid var(--line);background:var(--surface);
  cursor:pointer;color:var(--ink);transition:border-color .2s ease, background .2s ease;
}
.icon-btn:hover{border-color:var(--ink)}

select.ctl,input.ctl{
  font:500 14px/1.2 'Archivo',sans-serif;
  padding:10px 12px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  transition:border-color .2s ease;
}
select.ctl:hover,input.ctl:hover{border-color:var(--muted)}
input.ctl:focus-visible{outline-offset:0}
input.mono{font-family:'JetBrains Mono',monospace;font-size:13px}

/* ============================================================
   Topbar
   ============================================================ */
.topbar{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;justify-content:space-between;
  max-width:1160px;margin-inline:auto;padding:14px 24px;
  background:color-mix(in srgb,var(--bg) 82%, transparent);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid color-mix(in srgb,var(--line) 70%, transparent);
}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink)}
.brand-mark{
  display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;
  background:var(--ink);color:var(--amber);
  font:800 13px/1 'JetBrains Mono',monospace;letter-spacing:-.5px;
}
.brand-mark.small{width:26px;height:26px;font-size:10px;border-radius:7px}
.brand-name{font-weight:800;font-size:17px;letter-spacing:-.02em}
.topnav{display:flex;align-items:center;gap:22px}
.topnav > a{color:var(--muted);text-decoration:none;font-size:14.5px;font-weight:500;transition:color .2s ease}
.topnav > a:hover{color:var(--ink)}

/* ============================================================
   Hero
   ============================================================ */
.hero{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
  padding-block:72px 64px;
}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--amber-deep);margin-bottom:18px;
}
.hero h1{
  font-size:clamp(42px,5.6vw,68px);font-weight:800;line-height:1.02;letter-spacing:-.03em;
  margin-bottom:20px;
}
.accent{color:var(--amber-deep)}
.lede{font-size:17.5px;color:var(--muted);max-width:46ch;margin-bottom:30px}

.hero-actions{display:flex;flex-direction:column;gap:10px}
.dropzone{
  border:1.6px dashed #B9BFAC;border-radius:var(--radius);
  background:var(--surface);padding:26px 22px;text-align:center;cursor:pointer;
  transition:border-color .2s ease, background .25s ease, transform .2s ease, box-shadow .25s ease;
}
.dropzone:hover,.dropzone:focus-visible{border-color:var(--amber-deep);transform:translateY(-2px);box-shadow:var(--shadow-rest)}
.dropzone.dragover{border-style:solid;border-color:var(--amber-deep);background:var(--amber-soft)}
.dropzone svg{margin-bottom:8px;color:var(--amber-deep)}
.dropzone-inner{display:flex;flex-direction:column;gap:3px}
.dropzone-inner strong{font-size:16.5px;font-weight:700}
.dropzone-inner span{font-size:13px;color:var(--muted)}
.hint{font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:6px}
.hint::before{content:"";display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--ok)}

.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px;padding:0;list-style:none}
.chips li{
  font:600 11px/1 'JetBrains Mono',monospace;letter-spacing:.08em;
  padding:7px 11px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--muted);
}

/* hero terminal panel */
.hero-panel{
  background:var(--terminal-bg);border-radius:calc(var(--radius) + 4px);
  box-shadow:var(--shadow-lift);overflow:hidden;
  transform:rotate(.6deg);
  transition:transform .35s ease;
}
.hero-panel:hover{transform:rotate(0deg) translateY(-4px)}
.panel-head{display:flex;align-items:center;gap:7px;padding:13px 16px;border-bottom:1px solid rgba(233,236,239,.09)}
.dot{width:10px;height:10px;border-radius:50%;background:#2E3438}
.panel-head code{margin-left:8px;font:500 12px/1 'JetBrains Mono',monospace;color:var(--terminal-dim)}
.panel-code{
  padding:16px 18px;font:400 12.5px/1.75 'JetBrains Mono',monospace;
  color:var(--terminal-ink);overflow:hidden;white-space:pre;
}
.ln{color:#5E6A73}
.hl{color:var(--amber)}
.pulse{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--amber);animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}

.ruler{position:relative;height:26px;border-top:1px solid rgba(233,236,239,.09)}
.panel-foot{
  display:flex;align-items:center;justify-content:space-between;
  padding:11px 16px;border-top:1px solid rgba(233,236,239,.09);
}
.panel-foot code{font:500 11.5px/1 'JetBrains Mono',monospace;color:var(--terminal-dim)}

/* signature: byte ruler */
.tick-row{position:relative;height:100%}
.tick{position:absolute;bottom:0;width:1px;background:currentColor;opacity:.45}
.tick.major{height:100%!important;opacity:.95!important}
.tick-label{
  position:absolute;top:1px;left:0;font:500 8.5px/1 'JetBrains Mono',monospace;
  letter-spacing:.02em;white-space:nowrap;opacity:.75;
}
.ruler-strip{position:relative;height:74px;margin-block:10px 30px;color:#6A7370;overflow:hidden}
#rulerTrack{height:100%;padding-inline:clamp(12px,4vw,80px);display:flex}
.ruler-track .tick-row{flex:1;min-width:120px}
.ruler-sweep{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg,transparent 44%,var(--amber) 50%,transparent 56%);
  mix-blend-mode:multiply;opacity:0;
}
body.sweep-play .ruler-sweep{animation:sweep 2.6s ease-in-out infinite}
@keyframes sweep{
  0%{transform:translateX(-52%);opacity:0}
  12%{opacity:.9}
  88%{opacity:.9}
  100%{transform:translateX(52vw);opacity:0}
}

/* ============================================================
   Features / steps / cta
   ============================================================ */
.features{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;
  padding-block:26px 30px;
}
.feature{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-rest);border-color:#CFD4C9}
.feature svg{color:var(--amber-deep);margin-bottom:14px}
.feature h3{font-size:16.5px;font-weight:700;letter-spacing:-.01em;margin-bottom:7px}
.feature p{font-size:13.5px;color:var(--muted)}
.feature code{font:500 12px/1 'JetBrains Mono',monospace;background:var(--amber-soft);padding:2px 6px;border-radius:5px;color:var(--amber-deep)}

.steps{padding-block:54px 66px}
.steps-head{margin-bottom:34px}
.steps-head h2{font-size:clamp(28px,3.6vw,40px);font-weight:800;letter-spacing:-.025em}
.step-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;list-style:none}
.step{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
}
.step-num{font:300 clamp(30px,3vw,38px)/1 'Archivo',sans-serif;color:var(--amber-deep);letter-spacing:-.03em}
.step h3{font-size:15.5px;font-weight:700;margin-bottom:5px}
.step p{font-size:13.5px;color:var(--muted)}

.cta-band{
  margin-inline:auto;max-width:1112px;
  background:var(--terminal-bg);border-radius:calc(var(--radius) + 6px);
  padding:52px 56px;color:var(--terminal-ink);
  background-image:
    linear-gradient(90deg,var(--terminal-bg) 0,var(--terminal-bg) 100%);
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset:auto -10% -60% -10%;height:70%;
  background:radial-gradient(closest-side,var(--amber-soft),transparent 70%);
  opacity:.55;pointer-events:none;
}
.cta-grid{display:flex;align-items:center;justify-content:space-between;gap:32px;position:relative;z-index:1}
.cta-band h2{font-size:clamp(26px,3.2vw,36px);font-weight:800;letter-spacing:-.02em;margin-bottom:8px}
.cta-band p{color:var(--terminal-dim);font-size:15px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn-primary{background:var(--amber);color:#14171A}
.cta-band .btn-primary:hover{background:#F2AE29;box-shadow:0 10px 30px rgba(232,160,19,.35)}
.cta-band .btn-outline{border-color:rgba(233,236,239,.35);color:var(--terminal-ink)}
.cta-band .btn-outline:hover{background:var(--terminal-ink);color:var(--terminal-bg)}

.faq{padding-block:64px 30px}
.faq-list{display:grid;gap:12px;max-width:820px}
.faq details{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0;overflow:hidden;transition:border-color .2s ease;
}
.faq details[open]{border-color:#CFD4C9}
.faq summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  cursor:pointer;padding:17px 20px;font-weight:650;font-size:15.5px;
}
.faq summary::-webkit-details-marker{display:none}
.chev{
  flex:none;width:22px;height:22px;border-radius:50%;position:relative;
  border:1px solid var(--line);transition:transform .25s ease,background .2s ease;
}
.chev::before{
  content:"";position:absolute;left:50%;top:50%;width:7px;height:7px;
  border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:translate(-50%,-58%) rotate(45deg);
}
details[open] .chev{transform:rotate(180deg);background:var(--amber-soft)}
.faq details > p{padding:0 20px 18px;color:var(--muted);font-size:14px;max-width:64ch}

.foot{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding-block:30px 42px;margin-top:26px;border-top:1px solid var(--line);
}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600}
.foot-meta{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px}
.sep{opacity:.5}

/* ============================================================
   Reader workspace
   ============================================================ */
#reader{position:fixed;inset:0;display:flex;flex-direction:column;background:var(--bg);z-index:50}
.rd-top{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  padding:12px 18px;background:var(--surface);border-bottom:1px solid var(--line);
}
.rd-file{min-width:0;flex:1}
.rd-file-name-row{display:flex;align-items:center;gap:10px;min-width:0}
.rd-file-name{font-weight:700;font-size:15px;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rd-file-size{font-size:11.5px;color:var(--muted)}
.badge{
  flex:none;font:700 10px/1 'JetBrains Mono',monospace;letter-spacing:.1em;text-transform:uppercase;
  padding:4px 8px;border-radius:999px;
}
.badge-ok{background:rgba(62,146,87,.14);color:var(--ok);border:1px solid rgba(62,146,87,.3)}
.rd-tools{display:flex;align-items:center;gap:10px}

.search-drawer{
  background:var(--terminal-bg);color:var(--terminal-ink);
  border-bottom:1px solid #23282D;padding:14px 18px;display:flex;flex-direction:column;gap:10px;
}
.sd-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.sd-row select.ctl,.sd-row input.ctl{background:#1D2226;border-color:#33393F;color:var(--terminal-ink)}
.sd-row input.ctl::placeholder{color:#6E7880}
.chk{display:flex;align-items:center;gap:6px;font:600 12.5px/1 'JetBrains Mono',monospace;color:var(--terminal-dim);cursor:pointer;user-select:none}
.chk input{accent-color:var(--amber);width:15px;height:15px;cursor:pointer}
.sd-status{font-size:12px;color:var(--terminal-dim);min-height:15px}
.hit-list{list-style:none;display:flex;flex-direction:column;gap:6px;max-height:220px;overflow:auto}
.hit-item{
  width:100%;text-align:left;background:#1D2226;border:1px solid #33393F;border-radius:9px;
  padding:9px 12px;cursor:pointer;color:var(--terminal-ink);
  font:400 12.5px/1.5 'JetBrains Mono',monospace;
  transition:border-color .15s ease,background .15s ease;
}
.hit-item:hover,.hit-item:focus-visible{border-color:var(--amber);background:#23292E}
.hit-off{color:var(--amber);margin-right:10px;font-weight:600}
.hit-text em{font-style:normal;background:var(--amber);color:#14171A;border-radius:3px;padding:0 2px}

.seekbar{display:flex;align-items:center;gap:12px;padding:10px 18px;background:var(--surface);border-bottom:1px solid var(--line)}
.seekbar input[type=range]{
  flex:1;appearance:none;-webkit-appearance:none;height:26px;background:transparent;cursor:pointer;
}
.seekbar input[type=range]::-webkit-slider-runnable-track{
  height:6px;border-radius:99px;
  background:linear-gradient(to right,var(--amber) 0%,var(--amber) var(--fill,0%),#E1E4DE var(--fill,0%));
}
.seekbar input[type=range]::-webkit-slider-thumb{
  appearance:none;-webkit-appearance:none;width:18px;height:18px;margin-top:-6px;
  border-radius:50%;background:var(--ink);border:3px solid var(--amber);
  transition:transform .15s ease;
}
.seekbar input[type=range]:active::-webkit-slider-thumb{transform:scale(1.2)}
.seekbar input[type=range]::-moz-range-track{height:6px;border-radius:99px;background:#E1E4DE}
.seekbar input[type=range]::-moz-range-progress{height:6px;border-radius:99px;background:var(--amber)}
.seekbar input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--ink);border:3px solid var(--amber)}

.viewport{flex:1;min-height:0;display:flex;flex-direction:column;padding:14px 18px 18px}
.vp-head{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--muted);padding:2px 4px 10px}
.code-wrap{
  position:relative;flex:1;min-height:0;display:flex;gap:0;
  background:var(--terminal-bg);border-radius:var(--radius);overflow:hidden;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.05);
}
.code-ruler,.code{
  margin:0;padding:16px 14px 16px 0;
  font:400 13px/1.65 'JetBrains Mono',monospace;
  overflow:auto;white-space:pre;
}
.code-ruler{
  flex:none;text-align:right;color:#4E5961;user-select:none;min-width:86px;
  padding-left:14px;border-right:1px solid rgba(233,236,239,.08);
}
.code{flex:1;color:var(--terminal-ink);padding-left:14px}
.line-mark{color:#39424B}
.hit-highlight{background:rgba(232,160,19,.32);border-radius:3px;padding:0 1px}
.line-toggle{
  position:absolute;right:12px;top:12px;width:32px;height:32px;border-radius:9px;
  border:1px solid #33393F;background:#1D2226;color:var(--amber);cursor:pointer;
  font-family:'JetBrains Mono',monospace;font-size:14px;
  transition:background .15s ease,border-color .15s ease;
}
.line-toggle[aria-pressed=true]{background:var(--amber);color:#14171A;border-color:var(--amber)}

.vp-nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-top:14px}
.jump{display:flex;align-items:center;gap:8px;margin-left:auto}
.jump input{width:190px}

.drop-overlay{
  position:fixed;inset:0;z-index:90;display:grid;place-items:center;
  background:color-mix(in srgb,var(--bg) 55%,transparent);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
}
.drop-overlay-card{
  background:var(--surface);border:2px dashed var(--amber-deep);border-radius:var(--radius);
  padding:34px 44px;display:flex;flex-direction:column;gap:6px;text-align:center;box-shadow:var(--shadow-lift);
}
.drop-overlay-card strong{font-size:18px}
.drop-overlay-card span{color:var(--muted);font-size:13.5px}

/* toast */
.toast{
  position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#fff;padding:12px 20px;border-radius:999px;
  font-size:14px;font-weight:550;opacity:0;pointer-events:none;z-index:100;
  transition:opacity .3s ease,transform .3s ease;box-shadow:var(--shadow-lift);
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:1020px){
  .hero{grid-template-columns:1fr;gap:40px;padding-block:52px 48px}
  .hero-panel{transform:none;max-width:640px}
  .step-list{grid-template-columns:1fr;gap:12px}
  .cta-grid{flex-direction:column;align-items:flex-start}
}
@media (max-width:720px){
  .topnav > a{display:none}
  .topnav .btn-ghost{display:none}
  .rd-tools{width:100%;order:3}
  .jump{margin-left:0;width:100%}
  .jump input{flex:1;width:auto}
  .vp-head{flex-direction:column;gap:2px}
  .cta-band{padding:38px 26px}
  .foot{flex-direction:column;align-items:flex-start}
}