:root {
  color-scheme: dark;
  --ink: #f3f0e8;
  --muted: #9fa8a5;
  --line: rgba(255, 255, 255, .14);
  --panel: rgba(19, 24, 26, .82);
  --accent: #8df0c6;
  --amber: #f4ca72;
  --danger: #ff8585;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 10%, rgba(141, 240, 198, .18), transparent 30%),
    radial-gradient(circle at 85% 80%, rgba(244, 202, 114, .14), transparent 28%),
    linear-gradient(135deg, #0c0f10 0%, #151a1d 48%, #0b0d0e 100%);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.login-shell {
  width: min(1120px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 36px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) 420px;
  gap: 28px;
  align-items: center;
}

.identity,
.login-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(18px);
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .38);
}

.identity {
  min-height: 540px;
  padding: 34px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  position: relative;
}

.identity::after {
  content: "";
  position: absolute;
  inset: auto -20% -35% 25%;
  height: 260px;
  background: repeating-linear-gradient(90deg, rgba(141, 240, 198, .18) 0 1px, transparent 1px 34px);
  transform: rotate(-8deg);
  opacity: .75;
}

.system-line {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.system-line span {
  height: 1px;
  background: var(--line);
}

.brand-lockup {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 24px;
}

.brand-mark {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--accent);
  color: #07120d;
  font-size: 36px;
  font-weight: 900;
}

.brand-lockup p,
.panel-head p {
  margin: 0 0 8px;
  color: var(--amber);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1.05;
}

h1 {
  max-width: 720px;
  font-size: clamp(40px, 6vw, 72px);
}

h2 {
  font-size: 36px;
}

.signal-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.signal-grid div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: rgba(255, 255, 255, .04);
}

.signal-grid b,
.signal-grid span {
  display: block;
}

.signal-grid b {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 5px;
}

.login-panel {
  padding: 28px;
}

form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
}

input {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0 13px;
  background: rgba(0, 0, 0, .28);
  color: var(--ink);
  outline: none;
  font: inherit;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(141, 240, 198, .14);
}

button {
  min-height: 50px;
  border: 0;
  border-radius: 7px;
  background: var(--accent);
  color: #07120d;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}

button:disabled {
  opacity: .65;
  cursor: wait;
}

.error {
  min-height: 20px;
  margin: 0;
  color: var(--danger);
}

@media (max-width: 860px) {
  .login-shell {
    padding: 14px;
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .identity {
    min-height: 360px;
    padding: 22px;
  }

  .signal-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 40px;
  }
}