/* FlashGPT shared styles: dark, Apple-native, system font only (no third-party font requests). */
:root {
  --bg: #000;
  --s1: #0d0d0f;
  --s2: #16161a;
  --s3: #1f1f24;
  --line: rgba(255, 255, 255, .09);
  --text: #f5f5f7;
  --muted: #a1a1a8;
  --dim: #6e6e76;
  --radius: 22px;
  --wrap: 1120px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body { background: var(--bg); color: var(--text); font: 400 17px/1.55 var(--font); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img, video { display: block; max-width: 100%; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 2px solid #fff; outline-offset: 3px; border-radius: 6px; }
::selection { background: #fff; color: #000; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: 24px; padding-right: 24px; }
h1, h2, h3 { letter-spacing: -0.03em; line-height: 1.05; font-weight: 700; }
.muted { color: var(--muted); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; padding: 0 24px; border-radius: 999px; background: #fff; color: #000; font-weight: 600; font-size: 16px; text-decoration: none; transition: transform .15s var(--ease), background .15s; white-space: nowrap; }
.btn:hover { background: #e8e8ed; }
.btn:active { transform: scale(.97); }
.btn.ghost { background: var(--s2); color: var(--text); }
.btn.ghost:hover { background: var(--s3); }
.btn.sm { height: 38px; padding: 0 16px; font-size: 14px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 20; background: rgba(0, 0, 0, .78); backdrop-filter: saturate(160%) blur(16px); -webkit-backdrop-filter: saturate(160%) blur(16px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: -0.02em; text-decoration: none; }
.brand img { width: 26px; height: 26px; border-radius: 7px; }
.nav nav { display: flex; align-items: center; gap: 28px; font-size: 14px; }
.nav nav a:not(.btn) { color: var(--muted); text-decoration: none; transition: color .15s; }
.nav nav a:not(.btn):hover { color: var(--text); }

/* footer */
footer { border-top: 1px solid var(--line); margin-top: 120px; padding: 48px 0 40px; font-size: 14px; color: var(--muted); }
footer .top { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
footer .cols { display: flex; gap: 56px; flex-wrap: wrap; }
footer .cols div { display: grid; gap: 10px; align-content: start; }
footer .cols b { color: var(--text); font-weight: 600; }
footer a { text-decoration: none; } footer a:hover { color: var(--text); }
footer .fine { margin-top: 40px; font-size: 12px; color: var(--dim); max-width: 760px; }

/* legal + contact pages */
.doc { max-width: 760px; margin: 0 auto; padding: 72px 24px 0; }
.doc h1 { font-size: clamp(36px, 5vw, 52px); }
.doc .updated { margin-top: 10px; color: var(--dim); font-size: 14px; }
.doc .lede { margin-top: 24px; font-size: 19px; color: var(--muted); }
.doc h2 { font-size: 22px; letter-spacing: -0.015em; margin: 44px 0 12px; }
.doc h3 { font-size: 17px; letter-spacing: 0; margin: 22px 0 6px; }
.doc p, .doc li { color: #d2d2d7; font-size: 16px; }
.doc p + p { margin-top: 12px; }
.doc ul { margin: 10px 0 0 20px; display: grid; gap: 6px; }
.doc a { color: #fff; text-underline-offset: 3px; }
.doc .caps { text-transform: uppercase; font-size: 14px; letter-spacing: .01em; }
.doc .box { background: var(--s1); border: 1px solid var(--line); border-radius: 16px; padding: 20px 22px; margin-top: 24px; }
.doc .box ul { margin-top: 6px; }
.doc table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 15px; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px 10px 0; border-bottom: 1px solid var(--line); color: #d2d2d7; }
.doc th { color: var(--text); font-weight: 600; }
.doc .scroll { overflow-x: auto; }

.form { display: grid; gap: 16px; margin-top: 32px; }
.form label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
.form input, .form select, .form textarea { background: var(--s1); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; font-size: 16px; color: var(--text); }
.form textarea { min-height: 160px; resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: rgba(255, 255, 255, .4); }
.form .hp { position: absolute; left: -9999px; }
.form .note { font-size: 14px; color: var(--muted); min-height: 1.4em; }

@media (max-width: 760px) {
  .nav nav a:not(.btn) { display: none; }
  footer .cols { gap: 32px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }