header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  position: relative;
}

header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.6;
}

.header-left {
  display: flex;
  align-items: flex-start;
  gap: 0;
}

.buttons { display: flex; gap: 8px; }

/* Tab panel containers */
.tab-panel {
  display: none;
  flex: 1;
  min-height: 0;
  flex-direction: column;
}

.tab-panel.active {
  display: flex;
}

/* Status bar */
.status-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  color: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: var(--neon-glow);
  padding: 10px 24px;
  border-radius: 4px;
  font-size: 11px;
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 200;
  white-space: nowrap;
}

.status-bar.visible { opacity: 1; }

/* File path display */
.file-path {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

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

/* ── Touch devices: always show delete/action buttons ── */
@media (hover: none) {
  .task-card .delete-btn { display: block; }
  .task-card .add-on-hover { display: block; }
  .article-card .article-delete-btn { opacity: 1; }
}

/* ── 1280px: Large tablets / small laptops ── */
@media (max-width: 1280px) {
  .column {
    min-width: 300px;
    max-width: 300px;
  }
}

/* ── 1024px: Medium tablets (landscape) ── */
@media (max-width: 1024px) {
  body {
    padding: 16px 18px;
  }

  .column {
    min-width: 260px;
    max-width: 260px;
  }

  .memory-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }

  .stat { padding: 12px 16px; min-width: 80px; }
  .stat-value { font-size: 26px; }
}

/* ── 768px: Tablets (portrait) & large phones ── */
@media (max-width: 768px) {
  body {
    padding: 12px 14px;
    height: auto;
    min-height: 100dvh;
    overflow: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* ─ Header ─ */
  header {
    flex-direction: column;
    gap: 10px;
    align-items: stretch;
    margin-bottom: 12px;
    padding-bottom: 12px;
  }

  .header-left {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    gap: 8px 10px;
    width: 100%;
    align-items: center;
  }

  .header-left svg {
    width: 26px;
    height: 26px;
    margin-right: 0;
    grid-row: 1 / 3;
  }

  .header-left > div:first-of-type {
    grid-column: 2;
    grid-row: 1;
  }

  h1 { font-size: 1.15rem; }

  #mainTabToggle {
    grid-column: 1 / 3;
    grid-row: 2;
    margin-left: 0;
    width: 100%;
    display: flex;
  }

  #mainTabToggle button {
    flex: 1;
    text-align: center;
    padding: 8px 6px;
    font-size: 11px;
    min-height: 36px;
  }

  #taskViewToggle { display: none !important; }

  .buttons {
    width: 100%;
    justify-content: flex-end;
    gap: 6px;
    flex-wrap: wrap;
  }

  #saveBtn,
  #articlesSaveBtn { padding: 8px 12px; font-size: 11px; min-height: 36px; }

  /* ─ Board / Kanban ─ */
  .tab-panel.active { display: flex; }

  .board {
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    gap: 14px;
    -webkit-overflow-scrolling: touch;
  }

  .column {
    min-width: 100%;
    max-width: 100%;
    height: auto;
    max-height: none;
  }

  .column-header { padding: 12px 14px; }

  .cards {
    max-height: 360px;
    -webkit-overflow-scrolling: touch;
  }

  .task-card { padding: 14px; }
  .task-card .delete-btn {
    display: block;
    top: 10px;
    right: 10px;
    padding: 6px 8px;
    font-size: 16px;
  }

  /* ─ List view ─ */
  .list-view { overflow-x: hidden; }

  /* ─ Memory panel ─ */
  #memoryPanel.tab-panel.active {
    min-height: 0;
    overflow: hidden;
  }

  .memory-content-area {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    -webkit-overflow-scrolling: touch;
  }

  .memory-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 6px;
  }
  .memory-tabs::-webkit-scrollbar { display: none; }

  .memory-tab {
    font-size: 11px;
    padding: 7px 12px;
    white-space: nowrap;
    min-height: 36px;
  }

  .memory-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
  }

  .memory-card-fields { grid-template-columns: 1fr; }

  .memory-flat-table td:first-child { width: 90px; font-size: 11px; }

  .stats { gap: 10px; margin-bottom: 16px; }
  .stat { padding: 10px 14px; min-width: 70px; }
  .stat-value { font-size: 22px; }

  /* ─ Articles panel ─ */
  .articles-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .articles-stats { gap: 8px; }

  .articles-stat {
    padding: 8px 12px;
    min-width: 68px;
  }

  .articles-stat-value { font-size: 1.2rem; }

  .articles-add-btn {
    width: 100%;
    justify-content: center;
    padding: 10px 16px;
    min-height: 40px;
  }

  .article-card-body { padding: 12px 14px; gap: 10px; }

  .article-progress-input { width: 72px; min-height: 36px; }

  .article-controls { gap: 6px; }

  /* ─ Modal ─ */
  .modal {
    width: calc(100vw - 28px);
    margin: 14px;
    max-height: calc(100dvh - 28px);
    border-radius: 10px;
  }

  /* ─ Password gate ─ */
  .password-box {
    width: calc(100vw - 40px);
    padding: 28px 20px;
  }
}

/* ── 480px: Standard phones ── */
@media (max-width: 480px) {
  body { padding: 10px 12px; }

  h1 { font-size: 1.05rem; }

  .header-left svg { width: 22px; height: 22px; }

  #mainTabToggle button { font-size: 10px; padding: 7px 4px; }

  .buttons { gap: 5px; }

  /* Board */
  .cards { max-height: 320px; }
  .card-title { font-size: 12px; }
  .card-note { font-size: 12px; }

  /* Memory */
  .memory-grid { grid-template-columns: 1fr; }

  .memory-flat-table { font-size: 12px; }
  .memory-flat-table th { padding: 8px 10px; font-size: 10px; }
  .memory-flat-table td { padding: 7px 10px; }
  .memory-flat-table td:first-child { width: 80px; }

  .stats { gap: 8px; }
  .stat { padding: 8px 10px; min-width: 60px; }
  .stat-value { font-size: 20px; }
  .stat-label { font-size: 8px; }

  /* Articles */
  .articles-stat { padding: 7px 10px; min-width: 58px; }
  .articles-stat-value { font-size: 1.05rem; }
  .articles-stat-label { font-size: 10px; }

  .article-card-body { padding: 10px 12px; gap: 8px; }
  .article-title-link { font-size: 13px; }
  .article-num { width: 22px; height: 22px; font-size: 10px; }

  .article-progress-group { width: 100%; }
  .article-progress-input { flex: 1; width: auto; }

  .article-add-form-row { flex-direction: column; }
  .article-add-form input { min-width: 0; width: 100%; }
  .article-add-form-actions { flex-direction: row; }
  .article-add-form-actions button { flex: 1; }

  /* Modal */
  .modal {
    width: calc(100vw - 20px);
    margin: 10px;
    max-height: calc(100dvh - 20px);
  }

  .modal-header { padding: 14px 16px; }
  .modal-body { padding: 14px 16px; }
  .modal-footer { padding: 12px 16px; gap: 8px; }
  .modal-footer button { flex: 1; text-align: center; justify-content: center; }
}

/* ── 360px: Very small / budget phones ── */
@media (max-width: 360px) {
  body { padding: 8px 10px; }

  h1 { font-size: 0.95rem; }

  #mainTabToggle button { font-size: 9px; padding: 6px 2px; letter-spacing: 0; }

  .view-toggle button { padding: 4px 6px; font-size: 9px; }

  .articles-stats { gap: 6px; }
  .articles-stat { min-width: 50px; padding: 6px 8px; }

  .memory-tab { font-size: 10px; padding: 6px 8px; }
}