/* Chat Detective · home. Self-contained: r.html keeps app.css. Dark by default, light on request. */
:root {
  --bg: #0b1020; --bg-2: #121a33; --bg-3: #1a2447;
  --surface: rgba(255, 255, 255, .045); --surface-2: rgba(255, 255, 255, .08);
  --ink: #f4efe6; --muted: #aab1c4; --line: rgba(255, 255, 255, .11);
  --amber: #f6b76b; --amber-ink: #2a1a05; --coral: #ff8571; --coral-deep: #e85f4c;
  --ok: #7fd6a2; --warn-bg: #3d3010; --warn-ink: #ffe3a3;
  --accent: var(--coral); --accent-ink: #1a0a06;
  --radius: 20px; --radius-s: 14px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 24px 60px -20px rgba(0, 0, 0, .7);
  --glow: 0 0 0 1px rgba(246, 183, 107, .18), 0 20px 60px -24px rgba(246, 183, 107, .45);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg: #f8f2e9; --bg-2: #f1e8da; --bg-3: #e8dcc8;
  --surface: rgba(255, 255, 255, .72); --surface-2: rgba(255, 255, 255, .92);
  --ink: #1b1a24; --muted: #5f5b6b; --line: rgba(27, 26, 36, .12);
  --amber: #c9791c; --amber-ink: #fff; --coral: #d9553f; --coral-deep: #b8402d;
  --ok: #2f7a4d; --warn-bg: #fff3c4; --warn-ink: #5a4500;
  --accent-ink: #fff;
  --shadow: 0 1px 2px rgba(0, 0, 0, .06), 0 24px 60px -24px rgba(60, 30, 10, .25);
  --glow: 0 0 0 1px rgba(201, 121, 28, .18), 0 20px 50px -24px rgba(201, 121, 28, .35);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.55 var(--sans); -webkit-tap-highlight-color: transparent;
  overflow-x: hidden; min-height: 100svh;
}
img, video, svg { display: block; max-width: 100%; }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; letter-spacing: -.01em; margin: 0; }
h1 { font-size: clamp(2.2rem, 7vw + .5rem, 4.6rem); line-height: 1.02; }
h2 { font-size: clamp(1.7rem, 3.2vw + .8rem, 2.6rem); line-height: 1.1; }
h3 { font-size: 1.2rem; line-height: 1.25; }
h1 em, h2 em { font-style: italic; color: var(--amber); }
p { margin: .6em 0; }
a { color: var(--amber); }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.wrap { width: min(100% - 32px, 1080px); margin-inline: auto; }
.narrow { width: min(100% - 32px, 640px); margin-inline: auto; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font: 700 .78rem/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--amber); margin-bottom: 14px; }
.eyebrow::before { content: ""; width: 18px; height: 2px; background: currentColor; border-radius: 2px; }
.lead { font-size: clamp(1.05rem, 1vw + .8rem, 1.25rem); color: var(--muted); max-width: 34em; }
.hint { color: var(--muted); font: .88rem/1.45 var(--sans); }

/* ---------- header */
.top {
  position: fixed; inset: 0 0 auto 0; z-index: 20; padding: max(10px, env(safe-area-inset-top)) 0 10px;
  background: linear-gradient(to bottom, rgba(11, 16, 32, .75), rgba(11, 16, 32, 0));
  transition: background .3s, backdrop-filter .3s;
}
:root[data-theme="light"] .top { background: linear-gradient(to bottom, rgba(248, 242, 233, .85), rgba(248, 242, 233, 0)); }
.top.solid { background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 700 1.05rem var(--sans); text-decoration: none; color: var(--ink); min-height: 44px; }
.brand svg { width: 30px; height: 30px; }
.brand span { color: var(--amber); }
.icon-btn {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px;
  min-width: 44px; min-height: 44px; font-size: 1.1rem; cursor: pointer; display: grid; place-items: center;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}

/* ---------- buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 54px; padding: 0 26px;
  border-radius: 999px; border: 0; font: 700 1.02rem var(--sans); cursor: pointer; text-decoration: none;
  background: linear-gradient(135deg, var(--amber), var(--coral)); color: var(--accent-ink);
  box-shadow: 0 10px 30px -10px rgba(255, 133, 113, .6), inset 0 1px 0 rgba(255, 255, 255, .35);
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
  transform: translateZ(0);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -12px rgba(255, 133, 113, .7), inset 0 1px 0 rgba(255, 255, 255, .35); }
.btn:active { transform: translateY(0) scale(.98); }
.btn:disabled { opacity: .4; cursor: not-allowed; transform: none; box-shadow: none; }
.btn.ghost { background: var(--surface); color: var(--ink); border: 1px solid var(--line); box-shadow: none; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.btn.ghost:hover { background: var(--surface-2); }
.btn.block { width: 100%; }
.btn svg { width: 20px; height: 20px; }
.row { display: grid; gap: 10px; margin-top: 12px; }

/* ---------- hero */
.hero { position: relative; min-height: 100svh; display: grid; align-items: end; isolation: isolate; overflow: hidden; }
.hero-media { position: absolute; inset: 0; z-index: -1; background: var(--bg); }
.hero-media img, .hero-media video { width: 100%; height: 100%; object-fit: cover; object-position: 50% 35%; }
.hero-media img { animation: kenburns 26s ease-in-out infinite alternate; transform-origin: 50% 40%; }
.hero-media video { position: absolute; inset: 0; }
.hero-media video.on + .hero-shade { opacity: 1; }
@keyframes kenburns { from { transform: scale(1.02); } to { transform: scale(1.1); } }
.hero-shade {
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 50% at 70% 45%, rgba(246, 183, 107, .18), transparent 70%),
    linear-gradient(to top, var(--bg) 0%, rgba(11, 16, 32, .88) 28%, rgba(11, 16, 32, .25) 62%, rgba(11, 16, 32, .35) 100%);
}
:root[data-theme="light"] .hero-shade { background: linear-gradient(to top, var(--bg) 0%, rgba(248, 242, 233, .9) 30%, rgba(27, 26, 36, .25) 70%, rgba(27, 26, 36, .35) 100%); }
:root[data-theme="light"] .hero .lead { color: var(--ink); }
.hero-inner { padding: 120px 0 44px; position: relative; }
.hero h1 { max-width: 11em; text-wrap: balance; text-shadow: 0 2px 24px rgba(0, 0, 0, .35); }
.hero .lead { margin-top: 18px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.trust { display: flex; align-items: center; gap: 10px; margin-top: 22px; font: .9rem/1.4 var(--sans); color: var(--muted); max-width: 30em; }
.trust svg { flex: none; width: 20px; height: 20px; color: var(--ok); }
.scroll-cue { display: none; position: absolute; right: 16px; bottom: 26px; width: 26px; height: 42px; border: 2px solid var(--line); border-radius: 14px; opacity: .8; }
.scroll-cue::after { content: ""; position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--amber); animation: cue 1.8s ease-in-out infinite; }
@keyframes cue { 0%, 100% { transform: translateY(0); opacity: 1; } 60% { transform: translateY(14px); opacity: 0; } }

/* ---------- parallax layers */
.hero-inner > * { will-change: transform; }

/* ---------- sections */
section.block { padding: 72px 0; position: relative; }
section.block + section.block { border-top: 1px solid var(--line); }
.sec-head { max-width: 40em; margin-bottom: 30px; }
.sec-head p { color: var(--muted); font-size: 1.05rem; }

/* ---------- discover cards (3D tilt) */
.discover { display: grid; gap: 40px; }
.cards { display: grid; gap: 14px; perspective: 1200px; }
.card3d {
  --rx: 0deg; --ry: 0deg; --gx: 50%; --gy: 50%;
  position: relative; border-radius: var(--radius); padding: 22px; background: var(--surface); border: 1px solid var(--line);
  box-shadow: var(--shadow); transform: rotateX(var(--rx)) rotateY(var(--ry)); transform-style: preserve-3d;
  transition: transform .25s ease, box-shadow .25s ease; overflow: hidden;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.card3d::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; border-radius: inherit;
  background: radial-gradient(360px circle at var(--gx) var(--gy), rgba(255, 255, 255, .13), transparent 55%);
  opacity: 0; transition: opacity .3s;
}
.card3d:hover::before, .card3d.live::before { opacity: 1; }
.card3d > * { transform: translateZ(24px); }
.card3d .ico {
  width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 16px;
  background: linear-gradient(145deg, rgba(246, 183, 107, .28), rgba(255, 133, 113, .18)); color: var(--amber);
  border: 1px solid rgba(246, 183, 107, .3); box-shadow: inset 0 1px 0 rgba(255, 255, 255, .25);
}
.card3d .ico svg { width: 24px; height: 24px; }
.card3d h3 { margin-bottom: 6px; }
.card3d p { margin: 0; color: var(--muted); font-size: .98rem; }

/* ---------- phone mockup */
.phone-stage { perspective: 1400px; display: grid; place-items: center; padding: 20px 0; }
.phone {
  --rx: 6deg; --ry: -14deg;
  width: min(300px, 78vw); aspect-ratio: 9 / 18.6; border-radius: 42px; padding: 12px;
  background: linear-gradient(160deg, #2a3356, #0d1327); border: 1px solid rgba(255, 255, 255, .18);
  box-shadow: 0 50px 90px -40px rgba(0, 0, 0, .9), 0 0 0 1px rgba(0, 0, 0, .4), inset 0 0 0 1px rgba(255, 255, 255, .06), var(--glow);
  transform: rotateX(var(--rx)) rotateY(var(--ry)); transform-style: preserve-3d; transition: transform .35s ease;
  animation: float 7s ease-in-out infinite; position: relative;
}
.phone::after { content: ""; position: absolute; left: 50%; top: 22px; width: 92px; height: 24px; margin-left: -46px; border-radius: 14px; background: #060913; }
@keyframes float { 0%, 100% { translate: 0 0; } 50% { translate: 0 -12px; } }
.phone-screen {
  height: 100%; border-radius: 32px; overflow: hidden; padding: 58px 18px 20px; color: #f4efe6;
  background: radial-gradient(120% 60% at 50% 0%, #1b2650 0%, #0b1020 70%);
  display: flex; flex-direction: column; gap: 12px; font-family: var(--sans);
}
.pv-head { font: 600 .72rem/1 var(--sans); letter-spacing: .1em; text-transform: uppercase; color: #aab1c4; display: flex; align-items: center; gap: 8px; }
.pv-head i { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 10px var(--ok); }
.pv-ring { --p: 0; width: 120px; height: 120px; border-radius: 50%; margin: 4px auto; display: grid; place-items: center;
  background: conic-gradient(var(--amber) calc(var(--p) * 1%), rgba(255, 255, 255, .1) 0); box-shadow: 0 0 40px -10px rgba(246, 183, 107, .7); }
.pv-ring span { width: 96px; height: 96px; border-radius: 50%; background: #0f1630; display: grid; place-items: center; font: 800 2rem/1 var(--sans); }
.pv-ring small { font-size: .9rem; opacity: .7; }
.phone-screen h4 { font-size: 1.15rem; text-align: center; }
.phone-screen p { margin: 0; font-size: .82rem; line-height: 1.4; color: #c9cfe0; text-align: center; }
.pv-bar { display: flex; height: 8px; border-radius: 999px; overflow: hidden; background: rgba(255, 255, 255, .1); }
.pv-bar i:first-child { background: var(--amber); } .pv-bar i:last-child { background: #5db3d3; }
.pv-row { display: flex; justify-content: space-between; align-items: center; font-size: .82rem; color: #c9cfe0; padding: 8px 10px; border-radius: 10px; background: rgba(255, 255, 255, .05); }
.pv-row b { color: #fff; }

/* ---------- how it works */
.how { display: grid; gap: 28px; }
.steps { list-style: none; counter-reset: s; padding: 0; margin: 0; display: grid; gap: 16px; }
.steps li { counter-increment: s; display: flex; gap: 16px; align-items: flex-start; }
.steps li::before {
  content: counter(s); flex: 0 0 40px; height: 40px; border-radius: 50%; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--amber), var(--coral)); color: var(--accent-ink); font: 800 1rem var(--sans);
  box-shadow: 0 8px 20px -8px rgba(255, 133, 113, .7);
}
.steps strong { display: block; font-family: var(--serif); font-size: 1.15rem; font-weight: 600; }
.steps span { color: var(--muted); }
.how-visual { position: relative; perspective: 1200px; }
.how-visual figure { margin: 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); transform: rotateY(8deg) rotateX(2deg); transform-style: preserve-3d; }
.how-visual img { aspect-ratio: 1; object-fit: cover; width: 100%; height: auto; display: block; }
.how-visual figcaption { position: absolute; left: 14px; right: 14px; bottom: 14px; padding: 12px 14px; border-radius: 14px; background: rgba(11, 16, 32, .72); color: #f4efe6; font: .88rem/1.4 var(--sans); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid rgba(255, 255, 255, .12); }
.export { margin-top: 28px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); padding: 6px 18px; }
details { border-top: 1px solid var(--line); padding: 10px 0; }
details:first-of-type { border-top: 0; }
summary { cursor: pointer; font: 600 1rem var(--sans); min-height: 44px; display: flex; align-items: center; justify-content: space-between; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-size: 1.4rem; color: var(--amber); transition: transform .2s; }
details[open] summary::after { transform: rotate(45deg); }
details ol { margin: .4em 0 .6em; padding-left: 1.3em; color: var(--muted); }
details em { font-style: normal; color: var(--ink); font-weight: 600; }
code { font: .92em ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--surface-2); padding: 1px 6px; border-radius: 6px; }

/* ---------- upload */
.upload-sec { padding-bottom: 90px; }
.panel {
  position: relative; border-radius: var(--radius); padding: 24px 20px; background: var(--surface); border: 1px solid var(--line);
  box-shadow: var(--shadow), var(--glow); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.panel::before { content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: linear-gradient(135deg, rgba(246, 183, 107, .55), transparent 40%, transparent 60%, rgba(255, 133, 113, .45));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; }
.panel h3 { margin-bottom: 6px; }
.drop {
  display: grid; place-items: center; gap: 8px; border: 2px dashed rgba(246, 183, 107, .45); border-radius: var(--radius-s); padding: 28px 16px; text-align: center;
  cursor: pointer; background: rgba(246, 183, 107, .06); color: var(--ink); transition: border-color .2s, background .2s; position: relative;
}
.drop svg { width: 34px; height: 34px; color: var(--amber); }
.drop:focus-within, .drop.over { border-color: var(--amber); background: rgba(246, 183, 107, .12); }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.drop small { color: var(--muted); font-size: .85rem; }
.fname { font-weight: 700; word-break: break-all; }
.checks { display: grid; gap: 2px; margin: 16px 0; }
.check { display: flex; gap: 12px; align-items: flex-start; padding: 9px 0; font: .95rem/1.4 var(--sans); cursor: pointer; }
.check input { flex: 0 0 24px; width: 24px; height: 24px; margin: 0; accent-color: var(--coral); }
.error { color: var(--coral); font: 600 .95rem var(--sans); margin: 10px 0 0; }
.bar { height: 12px; border-radius: 999px; background: var(--surface-2); overflow: hidden; margin: 14px 0 6px; }
.bar > i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--amber), var(--coral)); transition: width .3s; }
.pick { display: grid; gap: 10px; margin-top: 12px; }
.phases { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 10px; font-family: var(--sans); }
.phases li { display: flex; gap: 12px; align-items: center; color: var(--muted); }
.phases li::before { content: ""; width: 12px; height: 12px; border-radius: 50%; border: 2px solid var(--line); flex: none; }
.phases li.doing { color: var(--ink); font-weight: 700; }
.phases li.doing::before { border-color: var(--amber); box-shadow: 0 0 12px var(--amber); animation: pulse 1.2s ease-in-out infinite; }
.phases li.done::before { background: var(--ok); border-color: var(--ok); }
@keyframes pulse { 50% { opacity: .4; } }
.closed { border-color: var(--coral); }

/* ---------- closing */
.closing { padding: 80px 0 40px; text-align: center; }
.closing h2 { text-wrap: balance; }
.closing p { color: var(--muted); max-width: 36em; margin-inline: auto; }
footer { border-top: 1px solid var(--line); padding: 20px 0 calc(28px + env(safe-area-inset-bottom)); color: var(--muted); font: .85rem/1.5 var(--sans); }
footer nav { display: flex; gap: 18px; margin-bottom: 8px; }
footer a { color: var(--ink); text-decoration: none; min-height: 32px; display: inline-flex; align-items: center; }

/* ---------- floating CTA (mobile) */
.float-cta {
  position: fixed; left: 16px; right: 16px; bottom: calc(14px + env(safe-area-inset-bottom)); z-index: 15;
  transform: translateY(120%); transition: transform .35s cubic-bezier(.2, .7, .2, 1);
}
.float-cta.show { transform: none; }
.float-cta .btn { width: 100%; box-shadow: 0 16px 40px -10px rgba(0, 0, 0, .7), 0 10px 30px -10px rgba(255, 133, 113, .6); }

/* ---------- reveal on scroll */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s cubic-bezier(.2, .7, .2, 1); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; } .reveal.d2 { transition-delay: .16s; } .reveal.d3 { transition-delay: .24s; }

/* ---------- ambient glow blobs */
section:has(> .glow) { overflow-x: clip; }
.glow { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .35; pointer-events: none; z-index: -1; }
.glow.a { width: 380px; height: 380px; background: var(--amber); right: -120px; top: -80px; }
.glow.b { width: 320px; height: 320px; background: var(--coral); left: -140px; bottom: -60px; opacity: .22; }
:root[data-theme="light"] .glow { opacity: .18; }

/* ---------- larger screens */
@media (min-width: 640px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .row.two { grid-template-columns: 1fr 1fr; }
  .panel { padding: 30px 28px; }
}
@media (min-width: 880px) {
  .hero-inner { padding: 140px 0 70px; }
  .discover { grid-template-columns: 1.15fr .85fr; align-items: center; }
  .how { grid-template-columns: 1fr 1fr; align-items: center; gap: 48px; }
  section.block { padding: 96px 0; }
  .float-cta { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-media img, .phone, .scroll-cue::after, .phases li.doing::before { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card3d, .phone, .btn { transition: none; }
}