:root {
  --bg: #0b0d17;
  --panel: #161a2b;
  --text: #f0f2f8;
  --text-dim: #9aa0bd;
  --primary: #9d4edd;
  --primary-hover: #b451ff;
  --danger: #fb5b78;
  --border: #23283f;
  /* Keep authentication independent of remote font CDNs while covering Thai text. */
  --font-login: "Leelawadee UI", "Noto Sans Thai", Thonburi, Tahoma, Arial, sans-serif;
}

* { box-sizing: border-box; }

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  background-image: radial-gradient(circle at 50% 0%, rgba(157, 78, 221, 0.15) 0%, transparent 50%);
  color: var(--text);
  font-family: var(--font-login);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.login-wrapper {
  width: 100%;
  max-width: 400px;
  padding: 20px;
}

.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 30px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.login-brand {
  text-align: center;
  margin-bottom: 30px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100px;
  height: 100px;
  margin-bottom: 16px;
}

.login-brand h1 {
  margin: 0 0 8px 0;
  font-size: 24px;
  font-weight: 700;
  color: #eef0f8;
}
.brand-logo img {
  filter: drop-shadow(0 0 20px rgba(157, 78, 221, 0.6));
}

.login-brand p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.4;
}

.field {
  margin-bottom: 20px;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.input-icon {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon svg {
  position: absolute;
  left: 14px;
  color: var(--text-dim);
}

.input-icon input {
  width: 100%;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px 12px 40px;
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  transition: all 0.2s;
}

.input-icon input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(157, 78, 221, 0.2);
}

.btn-primary {
  width: 100%;
  background: linear-gradient(135deg, var(--primary), #7b2cbf);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  transition: all 0.2s;
  margin-top: 10px;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover), var(--primary));
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(157, 78, 221, 0.3);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.error-msg {
  background: rgba(251, 91, 120, 0.1);
  color: var(--danger);
  border: 1px solid rgba(251, 91, 120, 0.2);
  padding: 10px;
  border-radius: 6px;
  font-size: 13px;
  margin-bottom: 16px;
  text-align: center;
}

.login-footer {
  margin-top: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s linear infinite;
}

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

@media (max-width: 480px) {
  .login-wrapper {
    padding: 12px;
  }
  .login-card {
    padding: 24px 18px;
    border-radius: 12px;
  }
  .brand-logo {
    width: 76px;
    height: 76px;
    margin-bottom: 12px;
  }
  .login-brand h1 {
    font-size: 20px;
  }
  .login-brand p {
    font-size: 13px;
  }
  .btn-primary, .input-icon input {
    min-height: 44px;
  }
}