:root {
  --bg: #0b1017;
  --surface: #151d2b;
  --surface-2: #1f2a3d;
  --text: #eef3fa;
  --muted: #8fa3be;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --critical: #ef4444;
  --border: #2a3850;
  --radius: 16px;
  --font: "Segoe UI", Tahoma, "Vazirmatn", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
}

.login-bg {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.login-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
}

.login-glow-a {
  width: 420px;
  height: 420px;
  background: #2563eb;
  top: -120px;
  right: -80px;
}

.login-glow-b {
  width: 360px;
  height: 360px;
  background: #7c3aed;
  bottom: -100px;
  left: -60px;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: rgba(21, 29, 43, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(12px);
}

.login-brand {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.25rem;
}

.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.35rem;
}

.login-brand h1 {
  margin: 0;
  font-size: 1.25rem;
}

.login-brand p {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.login-lead {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field span {
  font-size: 0.82rem;
  color: var(--muted);
}

.field input {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.password-wrap {
  position: relative;
}

.password-wrap input {
  padding-left: 2.75rem;
}

.toggle-password {
  position: absolute;
  left: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 1rem;
  opacity: 0.65;
  padding: 0.25rem;
}

.toggle-password:hover { opacity: 1; }

.login-error {
  margin: 0;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
  font-size: 0.85rem;
}

.login-submit {
  margin-top: 0.25rem;
  width: 100%;
  padding: 0.85rem 1rem;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: transform 0.12s, opacity 0.12s;
}

.login-submit:hover:not(:disabled) {
  background: linear-gradient(135deg, #1d4ed8, var(--accent-hover));
}

.login-submit:active:not(:disabled) {
  transform: scale(0.98);
}

.login-submit:disabled {
  opacity: 0.7;
  cursor: wait;
}

.btn-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.login-footer {
  margin-top: 1.75rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
}

.login-footer p { margin: 0.25rem 0; }

.muted { opacity: 0.75; }

@media (max-width: 480px) {
  .login-card { padding: 1.5rem 1.25rem; }
}