/* Flash-AI.pro v4 — ice-light aurora theme, deep navy text, dark holo stage */
:root {
  --bg: #F2F5FD;
  --card: #FFFFFF;
  --ink: #0A102E;
  --dim: #3E4870;
  --line: rgba(20,30,80,.10);
  --line-bright: rgba(106,72,255,.35);
  --violet: #6A48FF;
  --cyan: #0E9FD8;
  --cyan-bright: #36D6FF;
  --mint: #0CC99B;
  --grad: linear-gradient(100deg, #6A48FF, #2BAAE2 55%, #0CC99B);
  --stage: #070B1E;
  --max: 1160px;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; background:var(--bg); }
body {
  background: var(--bg); color: var(--ink);
  font-family:'Outfit',system-ui,sans-serif; font-size:17px; line-height:1.66;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
body::before { /* soft aurora wash */
  content:''; position:fixed; inset:-15%; z-index:0; pointer-events:none;
  background:
    radial-gradient(36% 28% at 14% 8%, rgba(106,72,255,.10), transparent 70%),
    radial-gradient(32% 26% at 88% 16%, rgba(43,170,226,.10), transparent 70%),
    radial-gradient(38% 30% at 55% 100%, rgba(12,201,155,.07), transparent 70%);
}
main, nav, header, section, footer, .strip { position:relative; z-index:1; }
.display { font-family:'Unbounded',sans-serif; font-weight:400; }
.mono { font-family:'JetBrains Mono',monospace; }
.wrap { max-width:var(--max); margin:0 auto; padding:0 24px; }
.grad-text { background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent; }

/* ===== NAV ===== */
nav { position:fixed; top:0; left:0; right:0; z-index:60;
  backdrop-filter:blur(18px); background:rgba(255,255,255,.78);
  border-bottom:1px solid var(--line); }
.nav-in { display:flex; align-items:center; justify-content:space-between; height:70px; gap:18px; }
.logo { display:flex; align-items:center; gap:11px; text-decoration:none; }
.logo svg { width:34px; height:34px; flex:none; }
.logo .wordmark { font-family:'Unbounded',sans-serif; font-weight:400; font-size:1.02rem;
  letter-spacing:.05em; color:var(--ink); }
.logo .wordmark em { font-style:normal; background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent; }
.nav-center { display:flex; gap:30px; align-items:center; }
.nav-center a { color:var(--dim); text-decoration:none; font-size:.9rem; font-weight:500;
  padding:6px 2px; position:relative; transition:color .2s; }
.nav-center a::after { content:''; position:absolute; left:0; right:100%; bottom:0; height:2px;
  background:var(--grad); border-radius:2px; transition:right .25s; }
.nav-center a:hover, .nav-center a.here { color:var(--ink); }
.nav-center a:hover::after, .nav-center a.here::after { right:0; }
.nav-right { display:flex; align-items:center; gap:14px; }
/* language dropdown */
.lang-dd { position:relative; }
.lang-dd summary { list-style:none; cursor:pointer; display:flex; align-items:center; gap:7px;
  font-family:'JetBrains Mono',monospace; font-size:.76rem; color:var(--ink); font-weight:500;
  border:1px solid var(--line); border-radius:9px; padding:8px 13px; background:var(--card);
  transition:border-color .2s; user-select:none; }
.lang-dd summary::-webkit-details-marker { display:none; }
.lang-dd summary::after { content:''; width:7px; height:7px; border-right:1.6px solid var(--dim);
  border-bottom:1.6px solid var(--dim); transform:rotate(45deg) translateY(-2px); transition:transform .2s; }
.lang-dd[open] summary::after { transform:rotate(225deg) translateY(-1px); }
.lang-dd summary:hover { border-color:var(--line-bright); }
.lang-menu { position:absolute; right:0; top:calc(100% + 8px); background:var(--card);
  border:1px solid var(--line); border-radius:12px; padding:6px; min-width:130px;
  box-shadow:0 14px 40px rgba(10,16,46,.14); }
.lang-menu a { display:flex; justify-content:space-between; align-items:center; gap:14px;
  padding:9px 12px; border-radius:8px; text-decoration:none; color:var(--dim);
  font-size:.86rem; font-weight:500; }
.lang-menu a:hover { background:rgba(106,72,255,.07); color:var(--ink); }
.lang-menu a.on { color:var(--violet); }
.lang-menu a.on::after { content:'✓'; font-size:.75rem; }
.btn { display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:13px 26px;
  border-radius:11px; text-decoration:none; font-size:.92rem; font-weight:600;
  white-space:nowrap; transition:all .25s; }
.btn-grad { background:var(--grad); color:#fff; box-shadow:0 6px 22px rgba(106,72,255,.30); }
.btn-grad:hover { transform:translateY(-2px); box-shadow:0 10px 30px rgba(106,72,255,.42); }
.btn-line { border:1.5px solid var(--line-bright); color:var(--violet); background:var(--card); }
.btn-line:hover { background:rgba(106,72,255,.06); }
.nav-cta { padding:10px 20px; font-size:.84rem; }
@media (max-width:920px){ .nav-center { display:none; } }
@media (max-width:480px){ .logo .wordmark { font-size:.9rem; } .nav-cta { padding:9px 14px; font-size:.78rem; } }

/* ===== HERO ===== */
.hero { padding:150px 0 90px; }
.hero-grid { display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; }
@media (max-width:980px){ .hero-grid { grid-template-columns:1fr; gap:42px; } }
.eyebrow { font-family:'JetBrains Mono',monospace; font-size:.72rem; letter-spacing:.24em;
  text-transform:uppercase; color:var(--violet); margin-bottom:20px; display:flex; align-items:center; gap:12px; font-weight:500; }
.eyebrow::before { content:''; width:30px; height:2px; background:var(--grad); border-radius:2px; }
h1 { font-family:'Unbounded',sans-serif; font-weight:400; font-size:clamp(1.85rem,4.3vw,3.2rem);
  line-height:1.16; letter-spacing:-.01em; color:var(--ink); }
h2, h3, h4 { color:var(--ink); }
.hero-sub { margin-top:24px; max-width:50ch; color:var(--dim); font-size:1.05rem; }
.hero-cta { margin-top:36px; display:flex; gap:14px; flex-wrap:wrap; }
.hero-meta { margin-top:44px; display:flex; gap:34px; flex-wrap:wrap; }
.hm { font-family:'JetBrains Mono',monospace; font-size:.7rem; color:var(--dim); letter-spacing:.1em; }
.hm b { display:block; font-size:1.05rem; color:var(--ink); font-weight:600; letter-spacing:0; margin-bottom:3px; }

/* ===== HOLO STAGE (stays dark) ===== */
.holo-stage { position:relative; aspect-ratio:1/1.02; max-width:560px; margin:0 auto; width:100%;
  border-radius:22px; overflow:hidden; background:
    radial-gradient(62% 55% at 50% 42%, rgba(106,72,255,.16), transparent 75%), var(--stage);
  box-shadow:0 30px 70px rgba(10,16,46,.25); }
.holo-stage::before { content:''; position:absolute; inset:0; border-radius:22px; padding:1.5px;
  background:linear-gradient(140deg, rgba(106,72,255,.8), rgba(54,214,255,.25) 40%, rgba(54,214,255,.25) 60%, rgba(12,201,155,.8));
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude; pointer-events:none; }
#holo { position:absolute; inset:0; width:100%; height:100%; }
.holo-hud { position:absolute; left:18px; top:16px; right:18px; display:flex; justify-content:space-between;
  font-family:'JetBrains Mono',monospace; font-size:.62rem; letter-spacing:.18em; color:rgba(255,255,255,.45); z-index:2; }
.holo-hud .live { color:#5CFFC9; display:flex; align-items:center; gap:7px; }
.holo-hud .live::before { content:''; width:6px; height:6px; border-radius:50%; background:#5CFFC9;
  box-shadow:0 0 10px #5CFFC9; animation:blink 1.6s infinite; }
@keyframes blink { 50% { opacity:.25; } }
.holo-label { position:absolute; bottom:16px; left:0; right:0; text-align:center; z-index:2;
  font-family:'JetBrains Mono',monospace; font-size:.68rem; letter-spacing:.32em; color:#36D6FF;
  text-transform:uppercase; transition:opacity .5s; text-shadow:0 0 18px rgba(54,214,255,.6); }

/* ===== SECTIONS ===== */
section { padding:104px 0; }
.sec-head { max-width:700px; margin-bottom:54px; }
.sec-head h2 { font-family:'Unbounded',sans-serif; font-weight:400; font-size:clamp(1.45rem,2.9vw,2.2rem); line-height:1.24; margin-top:14px; }
.sec-head p { margin-top:16px; color:var(--dim); }
.center { text-align:center; margin-left:auto; margin-right:auto; }
.center .eyebrow { justify-content:center; }
.center .eyebrow::before { display:none; }

/* bento */
.bento { display:grid; grid-template-columns:repeat(6,1fr); gap:20px; }
.cell { border:1px solid var(--line); border-radius:20px; padding:36px 32px; background:var(--card);
  box-shadow:0 4px 24px rgba(10,16,46,.05); position:relative; overflow:hidden;
  transition:box-shadow .3s, transform .3s, border-color .3s; }
.cell:hover { transform:translateY(-4px); box-shadow:0 16px 44px rgba(10,16,46,.12); border-color:var(--line-bright); }
.cell.big { grid-column:span 6; display:grid; grid-template-columns:1fr 1fr; gap:36px; align-items:center; }
.cell.half { grid-column:span 3; }
@media (max-width:880px){ .cell.big { grid-template-columns:1fr; } .cell.half { grid-column:span 6; } }
.cell .ico { width:48px; height:48px; border-radius:13px; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(140deg, rgba(106,72,255,.12), rgba(43,170,226,.12)); border:1px solid var(--line-bright); margin-bottom:20px; }
.cell .ico svg { width:23px; height:23px; stroke:var(--violet); fill:none; stroke-width:1.7; stroke-linecap:round; stroke-linejoin:round; }
.cell h3 { font-family:'Unbounded',sans-serif; font-weight:400; font-size:1.16rem; line-height:1.3; margin-bottom:12px; }
.cell p { font-size:.94rem; color:var(--dim); }
.cell ul { margin-top:16px; list-style:none; }
.cell li { font-size:.88rem; color:var(--dim); padding:9px 0 9px 26px; position:relative; border-top:1px solid var(--line); }
.cell li::before { content:'▸'; position:absolute; left:4px; color:var(--cyan); }
.cell .more { margin-top:20px; display:inline-flex; align-items:center; gap:7px; font-size:.88rem;
  color:var(--violet); font-weight:600; text-decoration:none; transition:gap .25s; }
.cell .more:hover { gap:11px; }

/* strip */
.strip { border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  background:var(--card); padding:34px 0; }
.strip-in { display:flex; justify-content:space-between; flex-wrap:wrap; gap:26px; }
.tk { font-family:'JetBrains Mono',monospace; font-size:.68rem; letter-spacing:.14em; color:var(--dim); }
.tk b { display:block; font-family:'Unbounded',sans-serif; font-weight:400; font-size:1.45rem;
  color:var(--ink); margin-bottom:4px; letter-spacing:0; }

/* accord cards */
.acc-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
@media (max-width:880px){ .acc-grid { grid-template-columns:1fr; } }
.acc { border:1px solid var(--line); border-radius:20px; padding:34px 30px; background:var(--card);
  box-shadow:0 4px 24px rgba(10,16,46,.05); text-decoration:none; color:var(--ink); display:block;
  transition:box-shadow .3s, transform .3s; position:relative; overflow:hidden; }
.acc:hover { transform:translateY(-4px); box-shadow:0 16px 44px rgba(10,16,46,.12); }
.acc::after { content:''; position:absolute; top:0; left:0; right:0; height:3px; background:var(--grad); opacity:0; transition:opacity .3s; }
.acc:hover::after { opacity:1; }
.acc .mono-top { font-family:'JetBrains Mono',monospace; font-size:.66rem; color:var(--dim);
  letter-spacing:.14em; display:flex; justify-content:space-between; }
.acc .mono-top span:last-child { color:var(--mint); font-weight:600; }
.acc h3 { font-family:'Unbounded',sans-serif; font-weight:400; font-size:1.18rem; margin:18px 0 12px; line-height:1.3; }
.acc p { font-size:.92rem; color:var(--dim); }

/* page hero */
.page-hero { padding:160px 0 64px; }
.page-hero h1 { max-width:20ch; }
.crumbs { font-family:'JetBrains Mono',monospace; font-size:.7rem; color:var(--dim); margin-bottom:26px; letter-spacing:.12em; }
.crumbs a { color:var(--dim); text-decoration:none; } .crumbs a:hover { color:var(--violet); }

/* prose / duo */
.duo { display:grid; grid-template-columns:1fr 1fr; gap:54px; align-items:start; }
@media (max-width:880px){ .duo { grid-template-columns:1fr; gap:36px; } }
.prose p + p { margin-top:16px; }
.prose p { color:var(--dim); font-size:.99rem; }
.prose strong { color:var(--ink); font-weight:600; }
.prose h3 { font-family:'Unbounded',sans-serif; font-weight:400; font-size:1.18rem; margin:36px 0 14px; }
.callout { border-left:3px solid; border-image:var(--grad) 1; padding:18px 24px; margin:28px 0;
  background:var(--card); border-radius:0 14px 14px 0; font-size:.95rem; color:var(--ink);
  box-shadow:0 4px 18px rgba(10,16,46,.06); }

/* diagram panel (dark, like holo stage) */
.diagram { border-radius:20px; background:var(--stage); padding:30px; position:sticky; top:96px;
  box-shadow:0 24px 56px rgba(10,16,46,.22); }
.diagram svg { width:100%; height:auto; display:block; }
.diagram .cap { margin-top:14px; font-family:'JetBrains Mono',monospace; font-size:.66rem;
  letter-spacing:.16em; color:rgba(255,255,255,.5); text-align:center; text-transform:uppercase; }
@media (max-width:880px){ .diagram { position:static; } }

/* steps (kept on internal pages) */
.steps { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; counter-reset:s; }
@media (max-width:880px){ .steps { grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .steps { grid-template-columns:1fr; } }
.step { border:1px solid var(--line); border-radius:18px; padding:28px 24px; background:var(--card);
  box-shadow:0 4px 20px rgba(10,16,46,.05); }
.step::before { counter-increment:s; content:counter(s,decimal-leading-zero);
  font-family:'JetBrains Mono',monospace; font-size:.74rem; color:var(--violet); letter-spacing:.2em; font-weight:600; }
.step h4 { font-family:'Unbounded',sans-serif; font-weight:400; font-size:.96rem; margin:12px 0 8px; }
.step p { font-size:.86rem; color:var(--dim); }

/* form */
.form-wrap { max-width:680px; margin:0 auto; border:1px solid var(--line); border-radius:22px;
  padding:46px; background:var(--card); box-shadow:0 20px 60px rgba(10,16,46,.10); position:relative; }
.f-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; margin-bottom:16px; }
@media (max-width:600px){ .f-row { grid-template-columns:1fr; } .form-wrap { padding:32px 22px; } }
label { display:block; font-family:'JetBrains Mono',monospace; font-size:.66rem; letter-spacing:.16em;
  text-transform:uppercase; color:var(--dim); margin-bottom:8px; font-weight:500; }
input, select, textarea { width:100%; background:var(--bg); border:1.5px solid var(--line);
  border-radius:11px; padding:13px 16px; color:var(--ink); font-family:'Outfit',sans-serif;
  font-size:.95rem; transition:border-color .25s, box-shadow .25s; }
input:focus, select:focus, textarea:focus { outline:none; border-color:var(--violet);
  box-shadow:0 0 0 4px rgba(106,72,255,.12); background:var(--card); }
textarea { resize:vertical; min-height:110px; }
.f-submit { width:100%; border:none; cursor:pointer; margin-top:8px; font-family:'Outfit',sans-serif; }

/* footer */
footer { border-top:1px solid var(--line); padding:44px 0; background:var(--card); }
.foot-in { display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px;
  font-size:.82rem; color:var(--dim); }
.foot-links { display:flex; gap:24px; }
.foot-links a { color:var(--dim); text-decoration:none; font-size:.84rem; font-weight:500; }
.foot-links a:hover { color:var(--violet); }

/* reveal */
.rv { opacity:0; transform:translateY(22px); transition:opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1); }
.rv.in { opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce) { .rv { opacity:1; transform:none; transition:none; } html { scroll-behavior:auto; } }
:focus-visible { outline:2.5px solid var(--violet); outline-offset:3px; }