/* ============================================================
   VERSE — Auth Page (Login / Sign Up)
   ============================================================ */

body.auth-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 24px 20px;
}

/* ── Brand ── */
.brand {
  text-align: center;
  margin-bottom: 40px;
  user-select: none;
}

.brand-logo {
  width: 72px; height: 72px;
  border-radius: var(--r-xl);
  margin: 0 auto 16px;
  object-fit: cover;
  box-shadow: 0 8px 32px rgba(124, 58, 237, 0.4);
  border: 1px solid var(--glass-border-bright);
  display: block;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1;
  cursor: default;
}

.brand-name span {
  display: block;
  font-size: 1.1rem;
  font-weight: 400;
  font-style: italic;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* ── Auth Card ── */
.auth-card {
  width: 100%;
  max-width: 380px;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: rgba(14, 14, 14, 0.72);
  backdrop-filter: blur(32px) saturate(200%);
  -webkit-backdrop-filter: blur(32px) saturate(200%);
  border: 1px solid var(--glass-border-bright);
  box-shadow: var(--glass-shadow-lg);
}

/* ── Tabs ── */
.auth-tabs {
  display: flex;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--glass-border);
}

.auth-tab {
  flex: 1;
  padding: 14px;
  text-align: center;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--t-fast), background var(--t-fast);
  user-select: none;
  border: none;
  background: transparent;
  letter-spacing: 0.03em;
  -webkit-tap-highlight-color: transparent;
}

.auth-tab.active {
  color: var(--text-primary);
  background: rgba(255,255,255,0.07);
  position: relative;
}
.auth-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 20%; right: 20%;
  height: 2px;
  background: var(--accent-gradient);
  border-radius: 2px 2px 0 0;
}

/* ── Form Body ── */
.auth-body { padding: 28px 28px 32px; }

.auth-form { display: flex; flex-direction: column; gap: 16px; }

.field-group { display: flex; flex-direction: column; gap: 6px; }

.field-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.field-input {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--t-fast), background var(--t-fast), box-shadow var(--t-fast);
  -webkit-appearance: none;
}

.field-input:focus {
  border-color: rgba(124, 58, 237, 0.6);
  background: rgba(124, 58, 237, 0.06);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
}

.field-input::placeholder { color: var(--text-tertiary); }

.field-input.error {
  border-color: rgba(239, 68, 68, 0.6);
  background: rgba(239, 68, 68, 0.05);
}

/* ── Submit Button ── */
.auth-submit {
  width: 100%;
  padding: 15px;
  margin-top: 8px;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: opacity var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
  box-shadow: 0 4px 20px rgba(124, 58, 237, 0.45);
  -webkit-tap-highlight-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.auth-submit:hover { opacity: 0.92; box-shadow: 0 6px 28px rgba(124, 58, 237, 0.55); }
.auth-submit:active { transform: scale(0.98); }
.auth-submit:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ── Error/Success messages ── */
.auth-message {
  padding: 10px 14px;
  border-radius: var(--r-sm);
  font-size: 0.83rem;
  font-weight: 500;
  display: none;
  animation: fadeSlideIn 0.2s ease;
}
.auth-message.show { display: block; }
.auth-message.error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; }
.auth-message.success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: #86efac; }

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Footer ── */
.auth-footer {
  text-align: center;
  margin-top: 28px;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  line-height: 1.6;
}

/* ── Panel visibility ── */
.auth-panel { display: none; }
.auth-panel.active { display: block; }