/* ===========================================
   Auth Page — Login & Signup (Premium UI)
   =========================================== */

/* ── Full-page shell ── */
html, body { height: 100%; overflow: hidden; margin: 0; }

.auth-page {
  display: flex;
  height: 100vh;
  background: var(--bg-app);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text-primary);
}

/* ── Left panel (branding) ── */
.auth-brand-panel {
  width: 440px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--bg-surface-solid) 0%, var(--bg-app) 100%);
  border-right: 1px solid var(--border-default);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.auth-brand-bg {
  position: absolute;
  top: -20%; left: -20%; width: 140%; height: 140%;
  background: radial-gradient(circle at top left, rgba(59,130,246,0.15) 0%, transparent 40%),
              radial-gradient(circle at bottom right, rgba(16,185,129,0.1) 0%, transparent 50%);
  z-index: 0;
  pointer-events: none;
  animation: pulse-bg 15s ease-in-out infinite alternate;
}

@keyframes pulse-bg {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.1); opacity: 1; }
}

[data-theme="light"] .auth-brand-bg {
  background: radial-gradient(circle at top left, rgba(37,99,235,0.08) 0%, transparent 40%),
              radial-gradient(circle at bottom right, rgba(5,150,105,0.05) 0%, transparent 50%);
}

.auth-brand-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  padding: var(--space-12) var(--space-10);
  height: 100%;
}

.auth-brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: auto;
}
.auth-brand-mark {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
  border-radius: var(--radius-xl);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 1.25rem;
  box-shadow: 0 4px 14px rgba(59,130,246,0.3);
}
.auth-brand-name { 
  font-size: 1.5rem; font-weight: 800; color: var(--text-primary); letter-spacing: -0.04em; 
}

.auth-brand-taglines { margin-top: auto; }
.auth-brand-headline {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: var(--space-8);
  background: linear-gradient(to right, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-brand-features { 
  list-style: none; display: flex; flex-direction: column; gap: var(--space-4); padding: 0; margin: 0;
}
.auth-brand-features li {
  display: flex; align-items: center; gap: var(--space-4);
  font-size: 0.95rem; color: var(--text-secondary); font-weight: 500;
}
.auth-brand-features li i {
  width: 32px; height: 32px;
  background: rgba(59,130,246,0.1); color: var(--color-primary-400);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(59,130,246,0.2);
}
[data-theme="light"] .auth-brand-features li i { 
  background: var(--color-primary-50); color: var(--color-primary-600); 
  box-shadow: inset 0 0 0 1px rgba(37,99,235,0.1);
}

.auth-brand-copy {
  margin-top: var(--space-12);
  font-size: 0.8rem; color: var(--text-tertiary); font-weight: 500;
}

/* ── Right panel (form) ── */
.auth-form-panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  overflow-y: auto;
  position: relative;
}

.auth-form-panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(circle at center, rgba(59,130,246,0.03) 0%, transparent 100%);
  pointer-events: none;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-surface-solid);
  padding: var(--space-10);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-default);
  box-shadow: 0 20px 40px -10px rgba(0,0,0,0.1);
  position: relative;
  z-index: 1;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
[data-theme="dark"] .auth-card {
  background: rgba(30,41,59,0.7); /* slate-800 with opacity for glassmorphism */
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
}

.auth-card-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.04em;
  margin-bottom: var(--space-2);
  margin-top: 0;
}
.auth-card-sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}
.auth-link {
  color: var(--color-primary-500);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}
.auth-link:hover { color: var(--color-primary-400); text-decoration: underline; }

/* ── Form ── */
.auth-form { display: flex; flex-direction: column; gap: var(--space-5); }
.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-label { 
  font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); 
  display: flex; justify-content: space-between; align-items: center;
}
.form-label-sub { font-size: 0.75rem; color: var(--text-tertiary); font-weight: 400; }

.input {
  background: var(--bg-surface-sunken); border: 1px solid var(--border-strong);
  font-size: 0.95rem; padding: 12px 16px;
  border-radius: var(--radius-lg); color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
}
[data-theme="dark"] .input { background: rgba(15,23,42,0.6); }

.input:hover { border-color: var(--text-tertiary); }
.input:focus { 
  border-color: var(--color-primary-500); 
  background: var(--bg-surface-solid);
  box-shadow: 0 0 0 4px rgba(59,130,246,0.15); 
}
.input::placeholder { color: var(--text-tertiary); }

.auth-submit {
  width: 100%; padding: 14px;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600)); 
  color: #fff; border: none; border-radius: var(--radius-lg);
  font-size: 1rem; font-weight: 700;
  cursor: pointer; transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: inherit; letter-spacing: 0.01em;
  margin-top: var(--space-2);
  display: flex; align-items: center; justify-content: center; gap: 8px;
  box-shadow: 0 4px 12px rgba(59,130,246,0.25);
}
.auth-submit:hover:not(:disabled) { 
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(59,130,246,0.35); 
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-primary-500));
}
.auth-submit:active:not(:disabled) { transform: translateY(0); }
.auth-submit:disabled { opacity: 0.6; cursor: not-allowed; box-shadow: none; filter: grayscale(50%); }

/* ── Guest Section (Divider + Button) ── */
.auth-divider {
  display: flex; align-items: center; margin: var(--space-8) 0;
  text-align: center; color: var(--text-tertiary); font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; border-bottom: 1px solid var(--border-default);
}
.auth-divider span { padding: 0 var(--space-4); }

.auth-guest-btn {
  width: 100%; padding: 12px;
  background: var(--bg-surface-sunken); color: var(--text-primary);
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  font-size: 0.95rem; font-weight: 600;
  cursor: pointer; transition: all 0.2s ease;
  font-family: inherit;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.auth-guest-btn:hover {
  background: var(--bg-surface-hover);
  border-color: var(--text-tertiary);
}
.auth-guest-btn i { transition: transform 0.2s ease; }
.auth-guest-btn:hover i { transform: translateX(4px); }

/* ── Error/info message ── */
.auth-msg {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  display: none;
  margin-bottom: var(--space-6);
  animation: slideDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.auth-msg.show { display: block; }
.auth-msg.error   { background: rgba(239,68,68,0.1);  color: var(--color-danger-400);  border: 1px solid rgba(239,68,68,0.2);  }
.auth-msg.success { background: rgba(16,185,129,0.1); color: var(--color-success-400); border: 1px solid rgba(16,185,129,0.2); }
.auth-msg.info    { background: rgba(59,130,246,0.1); color: var(--color-primary-400); border: 1px solid rgba(59,130,246,0.2); }
[data-theme="light"] .auth-msg.error   { color: var(--color-danger-700);   }
[data-theme="light"] .auth-msg.success { color: var(--color-success-700);  }
[data-theme="light"] .auth-msg.info    { color: var(--color-primary-700);  }

/* ── Turnstile container ── */
.auth-captcha { display: flex; justify-content: center; margin-top: var(--space-2); }

/* ── Signup disabled notice ── */
.auth-disabled {
  text-align: center; padding: var(--space-8);
  color: var(--text-secondary); border: 1px dashed var(--border-strong); background: var(--bg-surface-sunken);
  border-radius: var(--radius-lg); margin-top: var(--space-4); font-weight: 500;
}
.auth-disabled i { font-size: 1.75rem; margin-bottom: var(--space-3); display: block; color: var(--text-tertiary); }
.auth-disabled.hidden { display: none; }

/* ── Theme toggle (top right) ── */
.auth-theme-btn {
  position: fixed; top: var(--space-6); right: var(--space-6);
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full); background: var(--bg-surface-solid);
  border: 1px solid var(--border-default); color: var(--text-secondary);
  cursor: pointer; font-size: 1.1rem; transition: all 0.2s ease;
  z-index: 10;
  box-shadow: var(--shadow-sm);
}
.auth-theme-btn:hover { background: var(--bg-surface-hover); color: var(--text-primary); transform: scale(1.05); }

/* ── Contact support link ── */
.auth-contact-link {
  text-align: center; margin-top: var(--space-6);
  font-size: var(--text-sm);
}
.auth-contact-link a { display: inline-flex; align-items: center; gap: 6px; }

/* ── Password toggle ── */
.pw-wrap { position: relative; }
.pw-wrap .input { padding-right: 42px; }
.pw-toggle {
  position: absolute; right: 1px; top: 1px; bottom: 1px;
  width: 38px; display: flex; align-items: center; justify-content: center;
  background: transparent; border: none; cursor: pointer;
  color: var(--text-tertiary); font-size: 0.85rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  transition: color 0.15s ease;
}
.pw-toggle:hover { color: var(--text-primary); }

/* ── Responsive ── */
@media (max-width: 860px) {
  .auth-brand-panel { display: none; }
  .auth-form-panel { padding: var(--space-6) var(--space-4); }
  .auth-card { padding: var(--space-8) var(--space-6); }
  .auth-theme-btn { top: var(--space-4); right: var(--space-4); width: 36px; height: 36px; font-size: 0.9rem; }
}