/* Root scales for consistent spacing */
:root {
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --radius: 8px;
  --brand: #007bff;
  --brand-dark: #0056b3;
  --border: #ddd;
  --bg: #f4f4f4;
  --text: #333;
  --shadow: 0 4px 10px rgba(0,0,0,0.10);
}

/* Page background + safe-area padding */
body {
  font-family: Georgia, 'Times New Roman', Times, serif;
  color: var(--text);
  background-color: var(--bg);
  margin: 0;
}

/* Center content vertically without 100vh bugs on mobile */
.login-page {
  min-height: 100dvh; /* handles mobile browser UI better than 100vh */
  padding:
    max(env(safe-area-inset-top), var(--space-4))
    var(--space-4)
    max(env(safe-area-inset-bottom), var(--space-4));
  display: grid;
  place-items: center;
}

/* Card */
.login-container {
  width: min(100%, 420px);
  background-color: #fff;
  padding: clamp(16px, 3vw, 28px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Form */
form {
  display: grid;
  gap: var(--space-4);
}

h2 {
  margin: 0 0 var(--space-4);
  text-align: center;
  font-size: clamp(20px, 2.5vw, 24px);
}

.form-group {
  display: grid;
  gap: var(--space-2);
}

label {
  font-weight: bold;
}

/* Inputs: 16px prevents iOS zoom; large hit area on mobile */
input[type="text"],
input[type="email"],
input[type="password"] {
  width: 92%;
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 16px; /* keep >=16px to avoid iOS zoom */
  font-family: Georgia, 'Times New Roman', Times, serif;
  background: #fff;
  transition: box-shadow .2s ease, border-color .2s ease;
}

input:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, .15);
}

/* Submit button */
button.login-button {
  width: 100%;
  padding: var(--space-4);
  background-color: var(--brand);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-family: Georgia, 'Times New Roman', Times, serif;
  cursor: pointer;
  transition: background-color .2s ease, transform .08s ease-in-out;
}

button.login-button:hover {
  background-color: var(--brand-dark);
}

button.login-button:active {
  transform: translateY(1px);
}

/* Footer link */
.signup-link {
  text-align: center;
  margin-top: var(--space-3);
  font-size: 14px;
}

.signup-link a {
  color: var(--brand);
  text-decoration: none;
}

.signup-link a:hover {
  text-decoration: underline;
}

/* =========================
   Responsive Tweaks
   ========================= */

/* Tablets */
@media (max-width: 992px) {
  .login-container {
    width: min(100%, 440px);
  }
}

/* Phones */
@media (max-width: 768px) {
  .login-page {
    padding: var(--space-4);
  }

  .login-container {
    padding: 18px;
    border-radius: 8px;
  }
}

/* Small phones */
@media (max-width: 480px) {
  h2 {
    font-size: 20px;
  }

  input[type="text"],
  input[type="email"],
  input[type="password"] {
    padding: 12px 14px;
  }

  button.login-button {
    padding: 12px 14px;
    font-size: 16px; /* stay >=16px */
  }
}