/* ============================================================
   Auth Pages (Login, Callback) — Apple HIG Compliant
   ============================================================ */

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

html, body {
  height: 100%;
  font-family: var(--font-system);
  background-color: var(--color-bg-secondary);
  color: var(--color-label);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}


/* ============================================================
   PAGE LAYOUT
   ============================================================ */

.auth-page {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-24);
  overflow: hidden;
}

.auth-glow {
  position: absolute;
  top: 25%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, color-mix(in srgb, var(--color-accent) 6%, transparent) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}


/* ============================================================
   AUTH CARD
   ============================================================ */

.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 400px;
  background: var(--color-bg);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-48) var(--space-40);
  text-align: center;
  animation: auth-card-in 0.5s var(--ease-out) forwards;
}

@keyframes auth-card-in {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-brand {
  display: inline-block;
  margin-bottom: var(--space-24);
  text-decoration: none;
  transition: transform var(--duration-fast) var(--ease-default);
}

.auth-brand:hover {
  transform: scale(1.04);
  opacity: 1;
}

.auth-brand img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.auth-title {
  font-size: var(--text-title1);
  font-weight: var(--weight-bold);
  letter-spacing: -0.02em;
  line-height: var(--leading-tight);
  color: var(--color-label);
  margin-bottom: var(--space-8);
}

.auth-subtitle {
  font-size: var(--text-subheadline);
  font-weight: var(--weight-regular);
  color: var(--color-label-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-32);
}


/* ============================================================
   AUTH FORM
   ============================================================ */

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
  text-align: left;
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.auth-label {
  font-size: var(--text-subheadline);
  font-weight: var(--weight-medium);
  color: var(--color-label-secondary);
}

.auth-input {
  width: 100%;
  min-height: var(--tap-min);
  padding: var(--space-10) var(--space-14);
  font-family: var(--font-system);
  font-size: var(--text-body);
  color: var(--color-label);
  background: var(--color-fill-quaternary);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
}

.auth-input::placeholder {
  color: var(--color-label-tertiary);
}

.auth-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 16%, transparent);
}

.auth-form-error {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-12) var(--space-16);
  margin-bottom: var(--space-8);
  background: color-mix(in srgb, var(--color-red) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-red) 20%, transparent);
  border-radius: var(--radius-md);
  color: var(--color-destructive);
  font-size: var(--text-subheadline);
  line-height: var(--leading-normal);
  text-align: left;
}

.auth-form-error svg {
  flex-shrink: 0;
}


/* ============================================================
   AUTH BUTTON
   ============================================================ */

.auth-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  width: 100%;
  min-height: var(--tap-min);
  padding: var(--space-12) var(--space-24);
  font-family: var(--font-system);
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  color: #FFFFFF;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: 0 2px 12px color-mix(in srgb, var(--color-accent) 28%, transparent);
  transition: filter var(--duration-fast) var(--ease-default),
              transform var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
  -webkit-user-select: none;
  user-select: none;
}

.auth-btn:hover {
  filter: brightness(1.08);
  box-shadow: 0 4px 20px color-mix(in srgb, var(--color-accent) 36%, transparent);
}

.auth-btn:active {
  transform: scale(0.98);
  filter: brightness(0.96);
}

.auth-btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.auth-btn svg {
  flex-shrink: 0;
}


/* ============================================================
   AUTH FOOTER
   ============================================================ */

.auth-footer {
  margin-top: var(--space-24);
  font-size: var(--text-caption1);
  color: var(--color-label-tertiary);
  line-height: var(--leading-normal);
}

.auth-back {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-24);
  font-size: var(--text-subheadline);
  font-weight: var(--weight-medium);
  color: var(--color-label-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

.auth-back:hover {
  color: var(--color-accent);
  opacity: 1;
}


/* ============================================================
   DEBUG / TEST ACCOUNTS
   ============================================================ */

.auth-debug {
  margin-top: var(--space-24);
  padding: var(--space-16);
  background: var(--color-fill-quaternary);
  border: 1px solid var(--color-separator);
  border-radius: var(--radius-md);
  text-align: left;
}

.auth-debug-title {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--text-caption1);
  font-weight: var(--weight-semibold);
  color: var(--color-label-secondary);
  margin-bottom: var(--space-12);
}

.auth-debug-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-caption1);
}

.auth-debug-table th {
  text-align: left;
  padding: var(--space-4) var(--space-8);
  color: var(--color-label-tertiary);
  font-weight: var(--weight-medium);
  border-bottom: 1px solid var(--color-separator);
}

.auth-debug-table td {
  padding: var(--space-4) var(--space-8);
  color: var(--color-label-secondary);
}

.auth-debug-table code {
  font-family: var(--font-mono);
  font-size: var(--text-caption2);
  padding: var(--space-2) var(--space-6);
  background: var(--color-fill-secondary);
  border-radius: 4px;
  color: var(--color-label);
}


/* ============================================================
   CALLBACK PAGE — Spinner & States
   ============================================================ */

.auth-spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-fill-secondary);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: auth-spin 0.75s linear infinite;
  margin-bottom: var(--space-24);
}

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

.auth-message {
  font-size: var(--text-headline);
  font-weight: var(--weight-semibold);
  color: var(--color-label);
  margin-bottom: var(--space-8);
}

.auth-submessage {
  font-size: var(--text-subheadline);
  color: var(--color-label-secondary);
  line-height: var(--leading-normal);
}

.auth-error {
  display: none;
  margin-top: var(--space-24);
  padding: var(--space-16);
  background: color-mix(in srgb, var(--color-red) 6%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-red) 20%, transparent);
  border-radius: var(--radius-md);
  color: var(--color-destructive);
  font-size: var(--text-subheadline);
  line-height: var(--leading-normal);
}

.auth-error a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: var(--weight-semibold);
}

.auth-error a:hover {
  text-decoration: underline;
  opacity: 1;
}


/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 480px) {
  .auth-page {
    padding: var(--space-16);
  }

  .auth-card {
    padding: var(--space-40) var(--space-24);
    border-radius: var(--radius-lg);
  }

  .auth-title {
    font-size: var(--text-title2);
  }
}

@media (prefers-reduced-motion: reduce) {
  .auth-card {
    animation: none;
  }

  .auth-spinner {
    animation-duration: 1.5s;
  }
}