:root {
  --bg: #070b12;
  --panel: rgba(14, 22, 34, 0.88);
  --line: #243247;
  --text: #e8f0fa;
  --muted: #8fa3bb;
  --accent: #3ee0b5;
  --accent-2: #5b9dff;
  --danger: #ff6b7a;
  font-family: "IBM Plex Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
.login-body {
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(900px 480px at 8% -10%, rgba(62, 224, 181, 0.12), transparent 55%),
    radial-gradient(800px 420px at 100% 0%, rgba(91, 157, 255, 0.1), transparent 50%),
    var(--bg);
  display: grid;
  place-items: center;
  padding: 28px 16px;
  position: relative;
  overflow: hidden;
}

.login-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(62, 224, 181, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(62, 224, 181, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  pointer-events: none;
}

.login-scan {
  position: absolute;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(180deg, transparent, rgba(62, 224, 181, 0.07), transparent);
  animation: scan-y 7s linear infinite;
  pointer-events: none;
}

@keyframes scan-y {
  0% { top: -20%; }
  100% { top: 110%; }
}

.login-shell {
  position: relative;
  z-index: 1;
  width: min(920px, 100%);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: stretch;
}

.login-hero {
  padding: 28px 8px 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.login-brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 28px;
}

.login-mark {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #062218;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 24px rgba(62, 224, 181, 0.25);
}

.login-brand strong {
  display: block;
  font-size: 22px;
  letter-spacing: 0.02em;
}

.login-brand span {
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
}

.login-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
  font-weight: 700;
}

.login-hero > p {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 15px;
}

.login-chips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.login-chips li {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--accent);
  border: 1px solid rgba(62, 224, 181, 0.28);
  background: rgba(62, 224, 181, 0.06);
  border-radius: 999px;
  padding: 6px 10px;
}

.login-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(10px);
}

.login-kicker {
  margin: 0 0 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--accent-2);
}

.login-panel h2 {
  margin: 0 0 6px;
  font-size: 24px;
}

.login-sub {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 13px;
}

.login-panel form {
  display: grid;
  gap: 14px;
}

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

.login-panel input {
  width: 100%;
  border: 1px solid var(--line);
  background: #0a121c;
  color: var(--text);
  border-radius: 10px;
  padding: 12px 14px;
  font: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.login-panel input:focus {
  border-color: rgba(62, 224, 181, 0.55);
  box-shadow: 0 0 0 3px rgba(62, 224, 181, 0.12);
}

.login-btn {
  margin-top: 6px;
  border: 0;
  border-radius: 10px;
  padding: 12px 16px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  color: #062218;
  background: linear-gradient(135deg, var(--accent), #2bbf9a);
  transition: transform 0.12s, filter 0.12s;
}

.login-btn:hover { filter: brightness(1.05); }
.login-btn:active { transform: translateY(1px); }
.login-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.login-error {
  margin: 0;
  color: var(--danger);
  font-size: 13px;
}

@media (max-width: 820px) {
  .login-shell { grid-template-columns: 1fr; gap: 18px; }
  .login-hero { padding: 8px 4px 0; }
}