* {
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(135deg, #f0f4f8 0%, #d9e4ec 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  padding: 20px;
}

.form-container {
  background: #fff;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 440px;
}

.form-header {
  text-align: center;
  margin-bottom: 28px;
}

h1 {
  font-size: 24px;
  margin: 0 0 6px 0;
  color: #1a1a1a;
}

.subtitle {
  font-size: 13.5px;
  color: #777;
  margin: 0;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-row .form-group {
  flex: 1;
}

.form-group {
  margin-bottom: 18px;
}

label {
  display: block;
  margin-bottom: 6px;
  font-size: 13.5px;
  font-weight: 600;
  color: #333;
}

input {
  width: 100%;
  padding: 11px 12px;
  border: 1.5px solid #dde3ea;
  border-radius: 6px;
  font-size: 14px;
  transition: border-color 0.15s ease;
}

input:focus {
  outline: none;
  border-color: #2d7dfe;
}

.hint {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  color: #999;
}

button {
  width: 100%;
  padding: 13px;
  background: #2d7dfe;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  margin-top: 6px;
  transition: background 0.15s ease;
}

button:hover {
  background: #1c65e0;
}

.alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 13px 14px;
  border-radius: 8px;
  font-size: 13.5px;
  margin-bottom: 20px;
  line-height: 1.4;
}

.alert-icon {
  font-weight: bold;
  flex-shrink: 0;
}

.alert-error {
  background: #fdecec;
  color: #b02a2a;
  border: 1px solid #f5c6c6;
}

.alert-success {
  background: #e9f7ee;
  color: #1e7e34;
  border: 1px solid #c3e8cf;
}

@media (max-width: 480px) {
  .form-container {
    padding: 28px 22px;
    border-radius: 10px;
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  h1 {
    font-size: 21px;
  }

  input {
    font-size: 16px;
    /* prevents iOS Safari from auto-zooming on focus */
  }

  button {
    padding: 14px;
    font-size: 16px;
  }
}