:root {
  color-scheme: dark;
  --bg: #07090e;
  --surface: rgba(24, 28, 39, .72);
  --line: rgba(255, 255, 255, .12);
  --line-soft: rgba(255, 255, 255, .075);
  --text: #f5f7fb;
  --muted: #9aa3b3;
  --blue: #58a6ff;
  --green: #45d6a0;
  --amber: #ffc45c;
  --red: #ff6b7d;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", Inter, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { min-width: 320px; min-height: 100%; background: var(--bg); scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(900px 620px at 12% -8%, rgba(58, 128, 255, .21), transparent 62%),
    radial-gradient(760px 540px at 92% 20%, rgba(116, 78, 255, .13), transparent 65%),
    linear-gradient(145deg, #090c13, #06080c 72%);
  letter-spacing: -.008em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .24;
  background-image: linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
  content: "";
}
.portal-shell { position: relative; width: min(1100px, calc(100% - 40px)); margin: auto; padding: 28px 0 48px; }
.portal-brand { display: flex; align-items: center; gap: 13px; letter-spacing: .14em; }
.portal-brand b { font-size: 14px; font-weight: 760; letter-spacing: .17em; }
.portal-brand span { display: block; margin-top: 4px; color: #82b7ff; font-size: 9px; font-weight: 650; letter-spacing: .14em; }
.portal-logo {
  position: relative;
  width: 46px;
  height: 46px;
  overflow: hidden;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.4);
  border-radius: 14px;
  background: linear-gradient(155deg, #70dbff 0%, #2786ff 45%, #6b57ff 100%);
  color: white;
  font-size: 28px;
  font-weight: 780;
  letter-spacing: -.08em;
  text-indent: -.08em;
  box-shadow: 0 14px 38px rgba(38,106,255,.31), inset 0 1px rgba(255,255,255,.7);
}
.portal-logo::before { position: absolute; inset: 1px 1px 50%; border-radius: 13px 13px 55% 55%; background: linear-gradient(rgba(255,255,255,.3), transparent); content: ""; }
.portal-hero { max-width: 820px; padding: clamp(72px, 11vw, 130px) 0 42px; }
.portal-hero h1 { max-width: 760px; margin: 13px 0 18px; font-size: clamp(42px, 7vw, 76px); font-weight: 710; line-height: .98; letter-spacing: -.06em; }
.portal-hero p { max-width: 660px; margin: 0; color: #a4adbb; font-size: clamp(15px, 1.6vw, 18px); line-height: 1.65; letter-spacing: -.012em; }
.eyebrow { color: #7bb8ff; font-size: 10px; font-weight: 760; letter-spacing: .18em; }
.portal-card {
  padding: 26px;
  border: 1px solid rgba(255,255,255,.105);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(31,36,49,.72), rgba(15,18,26,.78));
  box-shadow: 0 28px 80px rgba(0,0,0,.27), inset 0 1px rgba(255,255,255,.055);
  backdrop-filter: blur(28px) saturate(120%);
  -webkit-backdrop-filter: blur(28px) saturate(120%);
}
.portal-card p, footer { color: var(--muted); line-height: 1.65; }
#portalForm { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(260px, 1fr) auto; align-items: end; gap: 14px; }
label { display: grid; gap: 8px; color: #bbc3cf; font-size: 12px; font-weight: 540; }
input, button {
  min-height: 48px;
  padding: 0 15px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 13px;
  color: var(--text);
  background: rgba(4,6,10,.42);
  font: inherit;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease;
}
input::placeholder { color: #657080; }
input:hover { border-color: rgba(255,255,255,.2); background: rgba(5,7,12,.58); }
input:focus { outline: none; border-color: rgba(88,166,255,.75); background: rgba(5,7,12,.74); box-shadow: 0 0 0 4px rgba(66,137,255,.14); }
button, .download-button {
  cursor: pointer;
  border-color: rgba(116,173,255,.5);
  background: linear-gradient(180deg, #4f9cff, #3474ed);
  color: white;
  font-weight: 650;
  box-shadow: 0 12px 30px rgba(42,105,225,.28), inset 0 1px rgba(255,255,255,.28);
}
button:hover, .download-button:hover { transform: translateY(-1px); background: linear-gradient(180deg, #65a9ff, #3e7cf2); box-shadow: 0 15px 36px rgba(42,105,225,.36), inset 0 1px rgba(255,255,255,.34); }
button:active, .download-button:active { transform: scale(.98); }
button:disabled { cursor: wait; opacity: .55; transform: none; }
.portal-error { grid-column: 1 / -1; min-height: 20px; margin: 0; color: #ff8fa0; }
.portal-result { margin-top: 20px; animation: reveal .3s cubic-bezier(.2,.75,.2,1); }
@keyframes reveal { from { opacity: 0; transform: translateY(10px); } }
.portal-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.portal-card h2 { margin: 8px 0 15px; font-size: clamp(22px, 3vw, 30px); font-weight: 680; letter-spacing: -.035em; }
.portal-badge { display: inline-flex; padding: 7px 10px; border-radius: 999px; background: rgba(255,180,54,.12); color: #ffd07d; font-size: 10px; font-weight: 780; letter-spacing: .04em; }
.portal-badge.ok { background: rgba(46,202,145,.12); color: #68e0b2; }
dl { margin: 20px 0 0; display: grid; gap: 10px; }
dl div { display: flex; justify-content: space-between; gap: 12px; padding-top: 11px; border-top: 1px solid rgba(255,255,255,.07); }
dt { color: var(--muted); }
dd { margin: 0; font-weight: 650; }
.download-button { min-height: 46px; margin-top: 4px; padding: 0 16px; display: inline-flex; align-items: center; border-radius: 12px; text-decoration: none; }
#resultIntegrity { display: block; margin-top: 15px; color: #747f90; line-height: 1.45; overflow-wrap: anywhere; }
footer { padding: 36px 5px 0; text-align: center; font-size: 11px; }
[hidden] { display: none !important; }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid rgba(88,166,255,.34); outline-offset: 3px; }

@media (max-width: 760px) {
  .portal-shell { width: min(100% - 24px, 620px); padding-top: 18px; }
  .portal-hero { padding: 72px 4px 30px; }
  .portal-hero h1 { font-size: clamp(39px, 12vw, 58px); }
  #portalForm, .portal-grid { grid-template-columns: 1fr; }
  .portal-card { padding: 20px; border-radius: 20px; }
  #portalForm button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}