:root {
  --bg: #0d1017;
  --bg-secondary: #141923;
  --bg-tertiary: #1d2430;
  --border: #262e3d;
  --border-strong: #333c4e;
  --text: #e6e8eb;
  --text-muted: #8a94a6;
  --accent: #5b8dff;
  --accent-soft: rgba(91, 141, 255, 0.14);
  --danger: #ee5a6d;
  --danger-soft: rgba(238, 90, 109, 0.14);
  --violet: #b794ff;
  --radius: 12px;
  --radius-sm: 6px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 20% 10%, rgba(91, 141, 255, 0.10), transparent 60%),
    radial-gradient(900px 500px at 80% 90%, rgba(183, 148, 255, 0.10), transparent 60%),
    var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-shell { width: 100%; padding: 24px; display: flex; justify-content: center; }

.login-card {
  width: 360px;
  max-width: 92vw;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: var(--shadow);
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.login-mark {
  width: 28px;
  height: 28px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--violet) 100%);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
}

.login-hint { color: var(--text-muted); font-size: 13px; margin-top: -2px; }

.login-input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: inherit;
  font-size: 14px;
  letter-spacing: 0.02em;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}
.login-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.login-submit {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: filter 120ms ease, transform 120ms ease;
}
.login-submit:hover { filter: brightness(1.12); }
.login-submit:active { transform: translateY(1px); }
.login-submit:disabled { opacity: 0.6; cursor: not-allowed; filter: none; }

.login-error {
  background: var(--danger-soft);
  color: var(--danger);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
  text-align: center;
}
.hidden { display: none !important; }