:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --panel: #151920;
  --panel-2: #10141a;
  --text: #f2f5f7;
  --muted: #9aa7b3;
  --line: #29313b;
  --accent: #70e0b8;
  --accent-2: #f2c36b;
  --danger: #ff6f7b;
  --blue: #7aa7ff;
}
* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(135deg, rgba(112, 224, 184, .10), transparent 34%), linear-gradient(225deg, rgba(122, 167, 255, .12), transparent 38%), var(--bg);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 28px;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
  pointer-events: none;
}
.shell {
  width: min(980px, 100%);
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  border: 1px solid var(--line);
  background: rgba(13, 16, 21, .86);
  box-shadow: 0 28px 90px rgba(0,0,0,.42);
  min-height: 560px;
}
.shell.not-found { grid-template-columns: 1fr; min-height: 520px; }
.brand-panel, .auth-panel { padding: clamp(28px, 5vw, 56px); position: relative; overflow: hidden; }
.brand-panel {
  background: linear-gradient(145deg, rgba(112,224,184,.14), rgba(122,167,255,.08)), var(--panel-2);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.brand-panel.wide { border-right: 0; align-items: flex-start; }
.signal-grid { display: grid; grid-template-columns: repeat(4, 44px); gap: 10px; opacity: .82; }
.signal-grid span { aspect-ratio: 1; border: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.035); }
.signal-grid span:nth-child(3n) { background: rgba(112,224,184,.18); border-color: rgba(112,224,184,.42); }
.signal-grid span:nth-child(5n) { background: rgba(242,195,107,.16); border-color: rgba(242,195,107,.36); }
.kicker, .section-label { margin: 0 0 14px; text-transform: uppercase; color: var(--accent); letter-spacing: .14em; font-size: 12px; font-weight: 700; }
h1 { margin: 0; font-size: clamp(52px, 9vw, 92px); line-height: .9; letter-spacing: 0; }
.not-found h1 { font-size: clamp(96px, 18vw, 180px); }
h2 { margin: 0 0 28px; font-size: 34px; letter-spacing: 0; }
.copy { max-width: 460px; color: var(--muted); font-size: 18px; line-height: 1.6; }
.status-row { display: flex; flex-wrap: wrap; gap: 10px; color: var(--muted); font-size: 13px; }
.status-row span { border: 1px solid var(--line); padding: 8px 10px; background: rgba(255,255,255,.03); }
.auth-panel { background: rgba(21,25,32,.94); align-self: stretch; display: flex; flex-direction: column; justify-content: center; }
.panel-topline { position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--blue)); }
form { display: grid; gap: 18px; }
label span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
input { width: 100%; height: 46px; border: 1px solid var(--line); background: #0c1015; color: var(--text); padding: 0 14px; font: inherit; outline: none; }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(112,224,184,.12); }
button, .home-link { height: 46px; border: 0; background: var(--accent); color: #06100c; font: inherit; font-weight: 800; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; padding: 0 18px; }
button:hover, .home-link:hover { background: #8af2ce; }
.home-link { margin-top: 18px; }
.error { min-height: 22px; margin: 0; color: var(--danger); font-size: 14px; line-height: 1.45; }
.shake { animation: shake .28s ease-in-out; }
@keyframes shake { 0%,100% { transform: translateX(0); } 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }
@media (max-width: 760px) {
  body { padding: 14px; place-items: stretch; }
  .shell { grid-template-columns: 1fr; min-height: auto; }
  .brand-panel { border-right: 0; border-bottom: 1px solid var(--line); min-height: 360px; }
  .signal-grid { grid-template-columns: repeat(4, 34px); }
  .auth-panel { min-height: 360px; }
}