*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: linear-gradient(140deg, #eff6ff 0%, #f1f5f9 60%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: #1e293b;
}

.login-card {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 8px 40px rgba(0,0,0,.11);
  padding: 40px 36px;
  width: 100%;
  max-width: 380px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.logo svg { color: #2563eb; }
.logo h1 { font-size: 1.25rem; font-weight: 700; }
.subtitle { color: #64748b; font-size: .875rem; margin-bottom: 28px; }

.form-group { display: flex; flex-direction: column; gap: 5px; margin-bottom: 14px; }
label {
  font-size: .78rem;
  font-weight: 700;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: .04em;
}
input {
  padding: 10px 12px;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-size: .9rem;
  color: #1e293b;
  font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
input:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

.btn-submit {
  width: 100%;
  padding: 11px;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 10px;
  font-family: inherit;
  transition: background .15s;
}
.btn-submit:hover { background: #1d4ed8; }

.alert-error {
  padding: 10px 14px;
  border-radius: 7px;
  background: #fef2f2;
  border-left: 4px solid #dc2626;
  color: #991b1b;
  font-size: .875rem;
  margin-bottom: 18px;
}