/* ═══════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════ */

/* ── Large Desktop ── */
@media (max-width: 1400px) {
  .summary-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1200px) {
  .analytics-grid { grid-template-columns: 1fr; }
  .analytics-card.span-2 { grid-column: span 1; }
  .analytics-summary { grid-template-columns: repeat(2, 1fr); }
  .vault-section { grid-template-columns: 1fr; }
  .vault-visual-container { padding: 20px; }
}

/* ── Tablet ── */
@media (max-width: 1024px) {
  .sidebar {
    width: 200px;
  }
  .main-content {
    margin-left: 200px;
    padding: 24px;
  }
  .summary-grid { grid-template-columns: repeat(3, 1fr); }
  .dash-grid { grid-template-columns: 1fr; }
  .mini-charts-row { grid-template-columns: 1fr; }
  .settings-grid { grid-template-columns: 1fr; }
}

/* ── Mobile ── */
@media (max-width: 768px) {
  /* Hide sidebar, show topbar */
  .sidebar {
    left: -240px;
    width: 240px;
    z-index: 200;
    box-shadow: none;
  }
  .sidebar.open {
    left: 0;
    box-shadow: 4px 0 40px rgba(0,0,0,0.5);
  }
  .mobile-topbar {
    display: flex;
  }
  .main-content {
    margin-left: 0;
    padding: 16px;
    padding-top: 72px;
  }
  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .goals-grid {
    grid-template-columns: 1fr;
  }
  .filter-bar {
    gap: 8px;
  }
  .filter-search {
    width: 100%;
    margin-left: 0;
  }
  .filter-search input {
    width: 100%;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .section-header .header-actions {
    width: 100%;
    justify-content: flex-between;
  }
  .xp-level-display {
    align-self: flex-start;
  }
  .page-title { font-size: 1.5rem; }
  .vault-stat-cards { grid-template-columns: 1fr 1fr; }
  .analytics-summary { grid-template-columns: 1fr 1fr; }
  .streak-header { flex-wrap: wrap; }
  .streak-milestones { flex-wrap: wrap; }
  .tx-filters { flex-direction: column; }
  .settings-grid { grid-template-columns: 1fr; }
  .hero { flex-direction: column; padding: 100px 20px 60px; gap: 40px; }
  .hero-visual { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .steps-container { flex-direction: column; }
  .step-connector { display: none; }
  .hero-stats { flex-direction: column; gap: 8px; }
  .hero-actions { flex-direction: column; }
  .btn-large { width: 100%; text-align: center; justify-content: center; }
  .achievements-grid { grid-template-columns: repeat(2, 1fr); }
  .modal { margin: 16px; max-height: calc(100vh - 32px); overflow-y: auto; }
}

@media (max-width: 480px) {
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .card-value { font-size: 1.1rem; }
  .achievements-grid { grid-template-columns: 1fr; }
  .vault-stat-cards { grid-template-columns: 1fr; }
  .analytics-summary { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.2rem; }
}

/* ── Overlay for mobile sidebar ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 199;
  backdrop-filter: blur(4px);
}
.sidebar-overlay.show {
  display: block;
}