:root {
  --forest: #0A3E27;
  --forest-deep: #062B1B;
  --forest-light: #1F6B45;
  --ochre: #915405;
  --ochre-light: #B8790F;
  --ochre-pale: #E8C98A;
  --cream: #F6F1E4;
  --paper: #FCFAF3;
  --earth: #241B10;
  --earth-soft: #3D3022;
  --white: #FFFFFF;
  --line: rgba(10,62,39,0.14);
  --serif: 'Fraunces', Georgia, serif;
  --sans: 'Work Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--sans);
  color: var(--earth);
  background: var(--forest-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(10,62,39,0.4) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(145,84,5,0.15) 0%, transparent 50%);
}
.login-card {
  background: var(--paper);
  border-radius: 12px;
  box-shadow: 0 25px 80px -20px rgba(0,0,0,0.5);
  width: 100%;
  max-width: 420px;
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
}
.login-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--forest), var(--ochre));
}
.login-header {
  text-align: center;
  margin-bottom: 36px;
}
.login-header img {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 0 auto 16px;
  display: block;
  border: 3px solid var(--cream);
  box-shadow: 0 4px 12px rgba(10,62,39,0.15);
}
.login-header h1 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--forest-deep);
  margin-bottom: 4px;
}
.login-header p {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ochre);
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--forest-deep);
  margin-bottom: 6px;
}
.form-group input {
  width: 100%;
  padding: 13px 16px;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--earth);
  background: var(--white);
  border: 1.5px solid var(--line);
  border-radius: 6px;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.form-group input:focus {
  border-color: var(--ochre);
  box-shadow: 0 0 0 3px rgba(145,84,5,0.12);
}
.form-group input::placeholder {
  color: #aaa;
}
.error-msg {
  display: none;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  font-size: 13.5px;
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
  line-height: 1.4;
}
.btn-login {
  width: 100%;
  padding: 14px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
  background: var(--forest);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn-login:hover {
  background: var(--forest-light);
  transform: translateY(-1px);
}
.btn-login:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}
.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.login-footer {
  text-align: center;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.login-footer a {
  font-size: 13px;
  color: var(--ochre);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.login-footer a:hover {
  color: var(--forest);
}
.login-footer p {
  font-size: 11.5px;
  color: #999;
  margin-top: 10px;
}
@media (max-width: 480px) {
  .login-card { padding: 36px 24px; }
  .login-header h1 { font-size: 19px; }
}