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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: #f5f5f5;
  color: #1a1a1a;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 16px;
}

.login-card {
  background: #fff;
  border-radius: 12px;
  padding: 40px 32px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

h1 {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4px;
}

.subtitle {
  text-align: center;
  color: #666;
  font-size: 14px;
  margin-bottom: 28px;
}

.input-group {
  margin-bottom: 16px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: #444;
  margin-bottom: 6px;
}

input[type="tel"],
input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #d0d0d0;
  border-radius: 8px;
  font-size: 16px;
  outline: none;
  transition: border-color 0.15s;
}

input:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s, opacity 0.15s;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: #2563eb;
  color: #fff;
  margin-bottom: 10px;
}

.btn-primary:hover:not(:disabled) {
  background: #1d4ed8;
}

.btn-secondary {
  background: transparent;
  color: #2563eb;
  border: 1px solid #d0d0d0;
}

.btn-secondary:hover:not(:disabled) {
  background: #f0f4ff;
}

.otp-hint {
  font-size: 14px;
  color: #444;
  margin-bottom: 20px;
  text-align: center;
  line-height: 1.5;
}

.error {
  margin-top: 16px;
  padding: 10px 14px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 8px;
  color: #b91c1c;
  font-size: 14px;
  text-align: center;
}

.error a,
.otp-hint a {
  color: inherit;
  text-decoration: underline;
  font-weight: 600;
}

.hidden {
  display: none;
}

#turnstile-container {
  margin-bottom: 16px;
  display: flex;
  justify-content: center;
}

.loading .btn-primary {
  position: relative;
  color: transparent;
}

.loading .btn-primary::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid #fff;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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