:root {
  --login-bg: #0f172a;
  --login-card: #ffffff;
  --login-text: #0f172a;
  --login-muted: #64748b;
  --login-border: #e2e8f0;
  --login-accent: #2563eb;
  --login-accent-dark: #1d4ed8;
  --login-error: #b91c1c;
  --login-error-bg: #fef2f2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: radial-gradient(circle at top, #1e3a8a 0, #0f172a 55%);
  color: var(--login-text);
}

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 390px;
  background: var(--login-card);
  border-radius: 18px;
  padding: 32px 28px 24px;
  box-shadow: 0 24px 70px rgba(2, 6, 23, 0.45);
}

.login-brand {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

h1 {
  margin: 0 0 6px;
  font-size: 26px;
  letter-spacing: -0.03em;
}

.login-subtitle {
  margin: 0 0 22px;
  color: var(--login-muted);
  font-size: 13px;
  line-height: 1.5;
}

.login-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 600;
}

.login-field input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--login-border);
  border-radius: 10px;
  font-size: 15px;
  color: var(--login-text);
  background: #f8fafc;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.login-field input:focus {
  border-color: var(--login-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  background: #fff;
}

.login-button {
  width: 100%;
  margin-top: 6px;
  padding: 12px 16px;
  border: 0;
  border-radius: 10px;
  background: var(--login-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}

.login-button:hover { background: var(--login-accent-dark); }
.login-button:disabled { opacity: 0.65; cursor: wait; }

.login-error {
  display: none;
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--login-error-bg);
  color: var(--login-error);
  font-size: 13px;
  line-height: 1.45;
}
.login-error.visible { display: block; }

.login-info {
  display: none;
  margin-top: 12px;
  color: var(--login-muted);
  font-size: 12px;
  line-height: 1.45;
}
.login-info.visible { display: block; }

.login-help {
  margin: 20px 0 10px;
  color: var(--login-muted);
  font-size: 12px;
  line-height: 1.45;
}

.login-demo {
  display: inline-block;
  color: var(--login-accent);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
}
.login-demo:hover { text-decoration: underline; }

@media (max-width: 480px) {
  .login-wrap { padding: 12px; align-items: flex-start; padding-top: 40px; }
  .login-card { padding: 26px 20px 20px; border-radius: 14px; }
}