/* ═══════════════════════════════════════════════
   AUTH PAGES — Login & Register v3
   LeetCode-inspired · Dark · Orange accent
   ═══════════════════════════════════════════════ */

.auth-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 2rem 1rem;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-deep);
}

/* Grid background */
.auth-page::before {
  content: '';
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.018) 1px, transparent 1px);
  background-size: 52px 52px;
  z-index: 0;
  opacity: 0.7;
}

/* Subtle orange ambient glow */
.auth-page::after {
  content: '';
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 700px; height: 400px;
  background: radial-gradient(
    ellipse,
    rgba(255,161,22,0.05) 0%,
    rgba(255,161,22,0.02) 40%,
    transparent 70%
  );
  z-index: 0;
  pointer-events: none;
}

.auth-bottom-glow {
  position: fixed; bottom: -80px; left: 20%; right: 20%;
  height: 160px;
  background: radial-gradient(ellipse, rgba(255,161,22,0.08) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}

/* ── Auth container ──────────────────────────────── */
.auth-container {
  width: 100%; max-width: 460px;
  position: relative; z-index: 1;
  animation: authEntrance 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes authEntrance {
  from { opacity: 0; transform: translateY(24px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Logo area ───────────────────────────────────── */
.auth-logo {
  text-align: center;
  margin-bottom: 1.75rem;
}

.auth-logo .logo-circle img {
  width: 70%; height: 70%;
  object-fit: contain;
}

.auth-logo .logo-circle {
  width: 72px; height: 72px;
  background: linear-gradient(135deg, var(--accent) 0%, #e08000 100%);
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  margin: 0 auto 1rem;
  box-shadow: 0 8px 32px rgba(255,161,22,0.35), inset 0 1px 0 rgba(255,255,255,0.2);
  animation: logoFloat 4s ease-in-out infinite;
  position: relative; overflow: hidden;
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.auth-logo h1 {
  font-family: var(--font-display);
  font-size: 1.8rem; font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-primary);
}

.auth-logo h1 span { color: var(--accent); }

.auth-logo p {
  color: var(--text-muted); font-size: 0.85rem;
  margin-top: 0.3rem;
}

/* ── Auth card ───────────────────────────────────── */
.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
  position: relative; overflow: hidden;
}

/* Top accent line */
.auth-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,161,22,0.5), transparent);
}

.auth-card h2 {
  font-size: 1.3rem; font-weight: 800;
  margin-bottom: 0.3rem;
  letter-spacing: -0.02em;
}

.auth-card .auth-subtitle {
  font-size: 0.85rem; color: var(--text-muted);
  margin-bottom: 1.75rem; line-height: 1.5;
}

/* Corner decorations */
.auth-corner {
  position: absolute;
  width: 10px; height: 10px;
  opacity: 0.4;
}

.auth-corner.tl { top: 10px; left: 10px; border-top: 2px solid var(--accent); border-left: 2px solid var(--accent); }
.auth-corner.tr { top: 10px; right: 10px; border-top: 2px solid var(--accent); border-right: 2px solid var(--accent); }
.auth-corner.bl { bottom: 10px; left: 10px; border-bottom: 2px solid var(--accent); border-left: 2px solid var(--accent); }
.auth-corner.br { bottom: 10px; right: 10px; border-bottom: 2px solid var(--accent); border-right: 2px solid var(--accent); }

/* ── Divider ─────────────────────────────────────── */
.auth-divider {
  text-align: center; margin: 1.25rem 0;
  position: relative;
  color: var(--text-muted); font-size: 0.78rem;
  letter-spacing: 0.05em; text-transform: uppercase;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  position: absolute; top: 50%;
  width: 40%; height: 1px;
  background: var(--border);
}

.auth-divider::before { left: 0; }
.auth-divider::after  { right: 0; }

/* ── Auth footer ─────────────────────────────────── */
.auth-footer {
  text-align: center; margin-top: 1.5rem;
  font-size: 0.85rem; color: var(--text-muted);
}

.auth-footer a {
  color: var(--accent); font-weight: 600;
  transition: var(--transition);
}

.auth-footer a:hover { color: var(--accent-bright); }

/* ── Verification banner ─────────────────────────── */
.verification-banner {
  background: rgba(255,161,22,0.06);
  border: 1px solid rgba(255,161,22,0.2);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  text-align: center; margin-bottom: 1.5rem;
  display: none;
  animation: fadeIn 0.3s ease;
}

.verification-banner.show { display: block; }
.verification-banner p { font-size: 0.87rem; color: var(--text-secondary); line-height: 1.6; }
.verification-banner strong { color: var(--accent); }

/* ── Alerts ──────────────────────────────────────── */
.alert {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem; margin-bottom: 1rem;
  display: none;
  align-items: flex-start; gap: 0.6rem;
  animation: alertSlide 0.2s ease;
}

@keyframes alertSlide {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.alert.show { display: flex; }
.alert.error   { background: rgba(239,71,67,0.08);   border: 1px solid rgba(239,71,67,0.25);   color: #f87171; }
.alert.success { background: rgba(45,181,93,0.08);   border: 1px solid rgba(45,181,93,0.25);   color: var(--success); }
.alert.info    { background: rgba(255,161,22,0.08);  border: 1px solid rgba(255,161,22,0.25);  color: var(--accent); }

.alert-icon { font-size: 1rem; flex-shrink: 0; margin-top: 0.05rem; }
.alert-body { flex: 1; line-height: 1.5; }

/* ── Password strength indicator ────────────────── */
.pwd-strength {
  margin-top: 0.5rem;
  display: flex; gap: 4px;
}

.pwd-strength-bar {
  flex: 1; height: 3px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.06);
  transition: var(--transition-slow);
}

.pwd-strength-bar.active.weak   { background: var(--danger); }
.pwd-strength-bar.active.medium { background: var(--warning); }
.pwd-strength-bar.active.strong { background: var(--success); }

.pwd-strength-label {
  font-size: 0.73rem; margin-top: 0.3rem;
  color: var(--text-muted); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  min-height: 1rem;
}

.pwd-strength-label.weak   { color: var(--danger); }
.pwd-strength-label.medium { color: var(--warning); }
.pwd-strength-label.strong { color: var(--success); }

/* ── OAuth buttons ───────────────────────────────── */
.oauth-btn {
  display: flex; align-items: center; justify-content: center; gap: 0.65rem;
  width: 100%; padding: 0.7rem 1rem;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-main); font-size: 0.88rem; font-weight: 600;
  cursor: pointer; transition: var(--transition);
  margin-bottom: 0.6rem;
}

.oauth-btn:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.15);
  color: var(--text-primary);
}

.oauth-btn img { width: 17px; height: 17px; }

/* ── Step indicator ──────────────────────────────── */
.auth-steps {
  display: flex; align-items: center; justify-content: center;
  gap: 0.5rem; margin-bottom: 1.75rem;
}

.auth-step { display: flex; align-items: center; gap: 0.5rem; }

.auth-step-num {
  width: 26px; height: 26px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700;
  background: rgba(255,255,255,0.04);
  border: 2px solid var(--border);
  color: var(--text-muted);
  transition: var(--transition);
}

.auth-step.active .auth-step-num {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 10px rgba(255,161,22,0.25);
}

.auth-step.done .auth-step-num {
  background: var(--success);
  border-color: var(--success);
  color: #000;
}

.auth-step-label {
  font-size: 0.72rem; color: var(--text-muted); font-weight: 600;
}

.auth-step.active .auth-step-label { color: var(--accent); }
.auth-step.done .auth-step-label   { color: var(--success); }

.auth-step-connector {
  flex: 1; max-width: 40px; height: 1px;
  background: var(--border);
}

.auth-step.done + .auth-step-connector { background: var(--success); }

/* ── Remember me / checkbox ──────────────────────── */
.auth-checkbox-wrap {
  display: flex; align-items: center; gap: 0.6rem;
  cursor: pointer; user-select: none;
  font-size: 0.85rem; color: var(--text-secondary);
}

.auth-checkbox-wrap input[type="checkbox"] { display: none; }

.auth-checkbox {
  width: 16px; height: 16px;
  border: 2px solid var(--border);
  border-radius: 4px;
  background: var(--bg-input);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}

.auth-checkbox-wrap:hover .auth-checkbox { border-color: var(--accent); }
.auth-checkbox-wrap input:checked ~ .auth-checkbox {
  background: var(--accent);
  border-color: var(--accent);
}

.auth-checkbox::after {
  content: '✓';
  color: #0a0a0a;
  font-size: 0.7rem; font-weight: 800;
  opacity: 0; transform: scale(0);
  transition: var(--transition-spring);
}

.auth-checkbox-wrap input:checked ~ .auth-checkbox::after {
  opacity: 1; transform: scale(1);
}

/* ── Forgot password link ────────────────────────── */
.auth-row {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.25rem;
}

.auth-link-sm {
  font-size: 0.8rem; color: var(--text-muted); font-weight: 600;
  transition: var(--transition);
}

.auth-link-sm:hover { color: var(--accent); }

/* ── Submit button ───────────────────────────────── */
.auth-submit {
  width: 100%; padding: 0.82rem 1.5rem;
  background: var(--accent);
  border: none; border-radius: var(--radius-sm);
  color: #0a0a0a; font-family: var(--font-main);
  font-size: 1rem; font-weight: 800;
  cursor: pointer; transition: var(--transition);
  box-shadow: 0 4px 16px rgba(255,161,22,0.35);
  letter-spacing: 0.01em;
  position: relative; overflow: hidden;
  margin-top: 0.5rem;
}

.auth-submit:hover {
  background: var(--accent-bright);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(255,161,22,0.45);
}

.auth-submit:active { transform: translateY(0); }
.auth-submit:disabled { opacity: 0.45; cursor: not-allowed; transform: none !important; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }