/**
 * style_km.css — Styles cho trang Quản lý Tri thức
 * ✨ v4.0: Layout ngang (split-pane), tối ưu đa thiết bị
 *   – Desktop/Tablet landscape: sidebar trái cố định, nội dung phải cuộn
 *   – Tablet portrait / Mobile: layout dọc, left-panel dạng drawer
 *   – Resize handle kéo được trên desktop
 */

/* ═══════════════════════════════════════════════════
   CSS CUSTOM PROPERTIES
   ═══════════════════════════════════════════════════ */
:root {
  --km-left-w: 340px;          /* Chiều rộng panel trái (thay đổi khi kéo) */
  --km-topbar-h: 56px;         /* Chiều cao topbar */
  --km-handle-w: 6px;          /* Chiều rộng resize handle */
}

/* ═══════════════════════════════════════════════════
   BODY OVERRIDE — không scroll toàn trang
   ═══════════════════════════════════════════════════ */
body {
  font-family: 'Be Vietnam Pro', sans-serif;
  height: 100vh;
  height: 100dvh;
  display: flex !important;
  flex-direction: column !important;
  overflow: hidden !important;
  position: relative;
}

/* Background gradient overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 10% 10%, rgba(244, 114, 182, 0.07) 0%, transparent 50%),
    radial-gradient(ellipse 40% 60% at 90% 90%, rgba(167, 139, 250, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

body.theme-dark::after {
  background:
    radial-gradient(ellipse 60% 40% at 10% 10%, rgba(124, 58, 237, 0.14) 0%, transparent 50%),
    radial-gradient(ellipse 40% 60% at 90% 90%, rgba(219, 39, 119, 0.11) 0%, transparent 50%);
}

/* ═══════════════════════════════════════════════════
   TOPBAR
   ═══════════════════════════════════════════════════ */
#km-topbar {
  position: relative;
  z-index: 100;
  flex-shrink: 0;
  height: var(--km-topbar-h);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border, #e8d5db);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

#km-topbar::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0%,
    var(--accent, #d46a8a) 20%,
    var(--pink-400, #e4a1b3) 50%,
    var(--accent, #d46a8a) 80%,
    transparent 100%);
  opacity: 0.5;
}

body.theme-dark #km-topbar {
  background: rgba(13, 8, 20, 0.9);
  border-color: rgba(255, 255, 255, 0.08);
}

body.theme-dark #km-topbar::after {
  background: linear-gradient(90deg,
    transparent 0%, #f472b6 20%, #a78bfa 50%, #f472b6 80%, transparent 100%);
  opacity: 0.4;
}

#km-topbar .brand {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent, #d46a8a);
  white-space: nowrap;
}

body.theme-dark #km-topbar .brand { color: #f472b6; }

#km-topbar .sep {
  color: var(--border, #ccc);
  font-size: 18px;
  opacity: 0.4;
  flex-shrink: 0;
}

#km-topbar h1 {
  font-size: 14px;
  font-weight: 600;
  margin: 0;
  color: var(--text, #333);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

body.theme-dark #km-topbar h1 { color: #f3e8ff; }

/* Mobile panel toggle button */
.km-panel-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 18px;
  color: var(--accent, #d46a8a);
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  transition: background 0.2s;
  margin-left: 4px;
  flex-shrink: 0;
}

.km-panel-toggle:hover {
  background: var(--pink-100, #fdecee);
}

body.theme-dark .km-panel-toggle {
  color: #f472b6;
}

body.theme-dark .km-panel-toggle:hover {
  background: rgba(244, 114, 182, 0.12);
}

#km-topbar .back-link {
  font-size: 12.5px;
  color: var(--pink-500, #c08497);
  text-decoration: none;
  margin-left: auto;
  padding: 6px 12px;
  border-radius: 10px;
  transition: all 0.2s ease;
  background: var(--pink-100, #fdecee);
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
  white-space: nowrap;
}

#km-topbar .back-link:hover {
  color: var(--accent, #d46a8a);
  border-color: var(--pink-300, #f4c4cd);
  transform: translateX(-2px);
}

body.theme-dark #km-topbar .back-link {
  background: rgba(244, 114, 182, 0.1);
  color: #c4b5d4;
}

body.theme-dark #km-topbar .back-link:hover {
  background: rgba(244, 114, 182, 0.2);
  color: #f472b6;
  border-color: rgba(244, 114, 182, 0.3);
}

/* ═══════════════════════════════════════════════════
   MAIN LAYOUT — horizontal split pane
   ═══════════════════════════════════════════════════ */
#km-layout {
  flex: 1;
  display: flex;
  flex-direction: row;
  min-height: 0;               /* important: allow flex children to shrink */
  overflow: hidden;
}

/* ── LEFT PANEL ── */
#km-left-panel {
  width: var(--km-left-w);
  min-width: var(--km-left-w);
  max-width: var(--km-left-w);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--border, #e8d5db);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background 0.25s;
}

body.theme-dark #km-left-panel {
  background: rgba(13, 8, 20, 0.5);
  border-color: rgba(255, 255, 255, 0.07);
}

#km-left-inner {
  flex: 1;
  overflow-y: auto;
  padding: 22px 20px 100px;
  scrollbar-width: thin;
  scrollbar-color: var(--pink-300, #f4c4cd) transparent;
}

body.theme-dark #km-left-inner {
  scrollbar-color: rgba(244, 114, 182, 0.3) transparent;
}

/* Section label */
.km-section-label {
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--pink-500, #c08497);
  margin-bottom: 12px;
}

body.theme-dark .km-section-label { color: #c4b5d4; }

/* ── RESIZE HANDLE ── */
#km-resize-handle {
  width: var(--km-handle-w);
  flex-shrink: 0;
  cursor: col-resize;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  transition: background 0.15s;
  position: relative;
  z-index: 10;
}

#km-resize-handle:hover,
#km-resize-handle:active {
  background: var(--pink-200, #f8dfe3);
}

body.theme-dark #km-resize-handle:hover,
body.theme-dark #km-resize-handle:active {
  background: rgba(244, 114, 182, 0.12);
}

.km-resize-grip {
  width: 2px;
  height: 48px;
  border-radius: 2px;
  background: var(--pink-300, #f4c4cd);
  opacity: 0.6;
  transition: opacity 0.2s, height 0.2s;
}

#km-resize-handle:hover .km-resize-grip {
  opacity: 1;
  height: 72px;
}

body.theme-dark .km-resize-grip {
  background: rgba(244, 114, 182, 0.4);
}

/* ── RIGHT PANEL ── */
#km-right-panel {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 22px 24px 24px;
}

/* ── MOBILE BACKDROP ── */
#km-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 200;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

#km-backdrop.active {
  display: block;
  opacity: 1;
  pointer-events: auto;
}

/* ═══════════════════════════════════════════════════
   STATS ROW — 2 cards side by side in panel
   ═══════════════════════════════════════════════════ */
.km-stats-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.km-stat-card {
  padding: 18px 16px;
  border-radius: 16px;
  border: 1px solid var(--border, #e8d5db);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(253, 236, 238, 0.9));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  animation: kmFadeIn 0.4s ease both;
}

.km-stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--pink-300, #f4c4cd), var(--accent, #d46a8a));
  opacity: 0.7;
}

.km-stat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(212, 106, 138, 0.14);
  border-color: var(--pink-300, #f4c4cd);
}

body.theme-dark .km-stat-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  border-color: rgba(255, 255, 255, 0.08);
}

body.theme-dark .km-stat-card::before {
  background: linear-gradient(90deg, #f472b6, #a78bfa);
}

body.theme-dark .km-stat-card:hover {
  box-shadow: 0 10px 36px rgba(244, 114, 182, 0.14);
  border-color: rgba(244, 114, 182, 0.3);
}

.km-stat-card .num {
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent, #d46a8a), var(--pink-400, #e4a1b3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  letter-spacing: -0.02em;
}

body.theme-dark .km-stat-card .num {
  background: linear-gradient(135deg, #f472b6, #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
}

.km-stat-card .lbl {
  font-size: 11px;
  font-weight: 500;
  color: var(--pink-500, #c08497);
  margin-top: 5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

body.theme-dark .km-stat-card .lbl { color: #c4b5d4; }

/* ── HINT CARD ── */
.km-hint-card {
  padding: 14px 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(253, 236, 238, 0.7), rgba(255, 247, 248, 0.5));
  border: 1px dashed var(--pink-300, #f4c4cd);
  font-size: 12.5px;
  color: var(--pink-500, #c08497);
  line-height: 1.7;
  animation: kmFadeIn 0.4s 0.1s ease both;
}

.km-hint-card strong { color: var(--accent, #d46a8a); }

body.theme-dark .km-hint-card {
  background: linear-gradient(135deg, rgba(244, 114, 182, 0.06), rgba(167, 139, 250, 0.04));
  border-color: rgba(244, 114, 182, 0.25);
  color: #c4b5d4;
}

body.theme-dark .km-hint-card strong { color: #f472b6; }

/* ═══════════════════════════════════════════════════
   UPLOAD CARD
   ═══════════════════════════════════════════════════ */
#km-upload-card {
  border-radius: 18px;
  border: 2px dashed var(--pink-300, #f4c4cd);
  padding: 22px 20px;
  background: linear-gradient(145deg, rgba(255, 247, 248, 0.9), rgba(253, 236, 238, 0.7));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.3s ease;
  position: relative;
  animation: kmFadeIn 0.4s 0.2s ease both;
}

#km-upload-card:hover,
#km-upload-card:focus-within {
  border-color: var(--accent, #d46a8a);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 106, 138, 0.12);
}

#km-upload-card.drag-over {
  border-color: var(--accent, #d46a8a);
  background: var(--pink-100, #fdecee);
  transform: scale(1.01);
}

body.theme-dark #km-upload-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  border-color: rgba(244, 114, 182, 0.3);
}

body.theme-dark #km-upload-card:hover,
body.theme-dark #km-upload-card:focus-within {
  border-color: #f472b6;
  box-shadow: 0 8px 32px rgba(244, 114, 182, 0.15);
}

/* File drop zone label */
.km-file-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  text-align: center;
  padding: 10px 0 6px;
}

.km-file-icon {
  font-size: 32px;
  color: var(--pink-400, #e4a1b3);
  transition: transform 0.2s;
}

#km-upload-card:hover .km-file-icon,
#km-upload-card.drag-over .km-file-icon {
  transform: translateY(-4px) scale(1.05);
}

body.theme-dark .km-file-icon { color: #f472b6; }

.km-file-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--text, #333);
}

.km-file-text u {
  color: var(--accent, #d46a8a);
  text-decoration-style: dotted;
}

body.theme-dark .km-file-text { color: #f3e8ff; }
body.theme-dark .km-file-text u { color: #f472b6; }

.km-file-hint {
  font-size: 11px;
  color: var(--pink-500, #c08497);
}

body.theme-dark .km-file-hint { color: #c4b5d4; }

/* Hide real file input, keep accessible */
#km-file-input {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0; pointer-events: none;
}

/* ═══════════════════════════════════════════════════
   TABLE CARD — fills right panel
   ═══════════════════════════════════════════════════ */
#km-table-card {
  flex: 1;
  min-height: 0;
  border-radius: 20px;
  border: 1px solid var(--border, #e8d5db);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(255, 247, 248, 0.9));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(212, 106, 138, 0.07);
  animation: kmFadeIn 0.4s 0.15s ease both;
}

body.theme-dark #km-table-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.3);
}

.tcard-header {
  padding: 14px 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border, #e8d5db);
  background: linear-gradient(135deg, var(--pink-100, #fdecee), rgba(255, 255, 255, 0.8));
  font-size: 13.5px;
  font-weight: 600;
  color: var(--accent, #d46a8a);
}

body.theme-dark .tcard-header {
  background: linear-gradient(135deg, rgba(244, 114, 182, 0.08), rgba(167, 139, 250, 0.05));
  border-color: rgba(255, 255, 255, 0.06);
  color: #f472b6;
}

/* Table scroll wrapper */
.km-table-wrap {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--pink-300, #f4c4cd) transparent;
}

body.theme-dark .km-table-wrap {
  scrollbar-color: rgba(244, 114, 182, 0.3) transparent;
}

/* ═══════════════════════════════════════════════════
   TABLE
   ═══════════════════════════════════════════════════ */
.table {
  margin-bottom: 0;
  font-size: 13px;
}

.table thead th {
  position: sticky;
  top: 0;
  z-index: 5;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--pink-500, #c08497);
  background: var(--pink-100, #fdecee);
  padding: 12px 18px;
  border-bottom-width: 1px;
  border-color: var(--border, #e8d5db);
}

body.theme-dark .table thead th {
  background: rgba(13, 8, 20, 0.9);
  color: #c4b5d4;
  border-color: rgba(255, 255, 255, 0.06);
}

.table tbody td {
  padding: 13px 18px;
  vertical-align: middle;
  border-color: var(--border, #f0e0e5);
  color: var(--text, #333);
}

body.theme-dark .table tbody td {
  border-color: rgba(255, 255, 255, 0.05);
  color: #f3e8ff;
}

.table-hover tbody tr { transition: all 0.2s ease; }

.table-hover tbody tr:hover > td {
  background: var(--pink-100, #fdecee) !important;
}

body.theme-dark .table-hover tbody tr:hover > td {
  background: rgba(244, 114, 182, 0.08) !important;
}

body.theme-dark .table tbody tr > td {
  background-color: transparent !important;
}

body.theme-dark .table {
  --bs-table-bg: transparent;
  --bs-table-hover-bg: rgba(244, 114, 182, 0.08);
  --bs-table-striped-bg: transparent;
  color: #f3e8ff;
}

.src-name {
  font-weight: 500;
  word-break: break-all;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chunk-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  background: linear-gradient(135deg, var(--pink-200, #f8dfe3), var(--pink-100, #fdecee));
  color: var(--accent, #d46a8a);
  border: 1px solid var(--pink-300, #f4c4cd);
}

body.theme-dark .chunk-pill {
  background: linear-gradient(135deg, rgba(244, 114, 182, 0.2), rgba(167, 139, 250, 0.15));
  color: #f472b6;
  border-color: rgba(244, 114, 182, 0.3);
}

/* Inline update row */
.update-tr > td {
  background: var(--pink-50, #fff7f8) !important;
  padding: 16px 18px 20px !important;
  border-top: 1px dashed var(--pink-300, #f4c4cd) !important;
}

body.theme-dark .update-tr > td {
  background: rgba(244, 114, 182, 0.05) !important;
  border-color: rgba(244, 114, 182, 0.2) !important;
}

/* Empty state */
.km-empty {
  padding: 56px 24px;
  text-align: center;
  color: var(--pink-500, #c08497);
  font-size: 14px;
}

.km-empty .ei {
  font-size: 48px;
  margin-bottom: 12px;
  display: block;
}

body.theme-dark .km-empty { color: #c4b5d4; }

/* ═══════════════════════════════════════════════════
   FORM CONTROLS
   ═══════════════════════════════════════════════════ */
.form-control,
.form-select {
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 13px;
  border-color: var(--border, #e8d5db);
  background: white;
  color: var(--text, #333);
  border-radius: 12px;
  padding: 10px 14px;
  transition: all 0.2s ease;
}

.form-control:focus {
  border-color: var(--accent, #d46a8a);
  box-shadow: 0 0 0 4px rgba(212, 106, 138, 0.12);
}

body.theme-dark .form-control,
body.theme-dark .form-select {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  color: #f3e8ff;
}

body.theme-dark .form-control:focus {
  border-color: #f472b6;
  box-shadow: 0 0 0 4px rgba(244, 114, 182, 0.15);
}

body.theme-dark .form-control::file-selector-button {
  background: rgba(244, 114, 182, 0.15);
  color: #f472b6;
  border: 0;
  border-right: 1px solid rgba(244, 114, 182, 0.25);
  padding: 10px 16px;
  margin-right: 12px;
  border-radius: 8px 0 0 8px;
}

/* ═══════════════════════════════════════════════════
   PROGRESS BAR
   ═══════════════════════════════════════════════════ */
.bg-km {
  background: linear-gradient(90deg, var(--pink-400, #e4a1b3), var(--accent, #d46a8a)) !important;
}

body.theme-dark .bg-km {
  background: linear-gradient(90deg, #f472b6, #a78bfa) !important;
}

#km-prog-wrap .progress {
  height: 18px;
  border-radius: 10px;
  background: var(--pink-100, #fdecee);
  overflow: hidden;
}

body.theme-dark #km-prog-wrap .progress {
  background: rgba(255, 255, 255, 0.06);
}

/* ═══════════════════════════════════════════════════
   STATUS TEXT
   ═══════════════════════════════════════════════════ */
.km-status {
  font-size: 12px;
  min-height: 18px;
  color: var(--pink-500, #c08497);
  padding: 4px 0;
}

.km-status.err { color: #dc3545; }
.km-status.ok  { color: #198754; }
.km-status.warn { color: #856404; }

body.theme-dark .km-status.ok  { color: #6ee7b7; }
body.theme-dark .km-status.err { color: #ff8a8a; }

/* ═══════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════ */
.btn-km {
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: 12.5px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 10px;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-km:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-km-primary {
  background: linear-gradient(135deg, var(--pink-300, #f4c4cd), var(--pink-400, #e4a1b3));
  color: var(--text, #333);
  box-shadow: 0 2px 8px rgba(212, 106, 138, 0.2);
}

.btn-km-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--pink-400, #e4a1b3), var(--accent, #d46a8a));
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(212, 106, 138, 0.3);
}

body.theme-dark .btn-km-primary {
  background: linear-gradient(135deg, rgba(244, 114, 182, 0.25), rgba(167, 139, 250, 0.2));
  color: #f3e8ff;
  border: 1px solid rgba(244, 114, 182, 0.35);
}

body.theme-dark .btn-km-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, rgba(244, 114, 182, 0.4), rgba(167, 139, 250, 0.3));
  box-shadow: 0 4px 20px rgba(244, 114, 182, 0.3);
}

.btn-km-outline {
  background: transparent;
  border: 1.5px solid var(--pink-300, #f4c4cd);
  color: var(--accent, #d46a8a);
}

.btn-km-outline:hover:not(:disabled) {
  background: var(--pink-100, #fdecee);
  border-color: var(--accent, #d46a8a);
  transform: translateY(-1px);
}

body.theme-dark .btn-km-outline {
  border-color: rgba(244, 114, 182, 0.3);
  color: #f472b6;
}

body.theme-dark .btn-km-outline:hover:not(:disabled) {
  background: rgba(244, 114, 182, 0.12);
  border-color: #f472b6;
}

.btn-km-danger {
  background: transparent;
  border: 1.5px solid rgba(220, 53, 69, 0.3);
  color: #dc3545;
}

.btn-km-danger:hover:not(:disabled) {
  background: rgba(220, 53, 69, 0.08);
  border-color: #dc3545;
  transform: translateY(-1px);
}

body.theme-dark .btn-km-danger {
  border-color: rgba(220, 53, 69, 0.35);
  color: #ff8a8a;
}

body.theme-dark .btn-km-danger:hover:not(:disabled) {
  background: rgba(220, 53, 69, 0.12);
  border-color: #ff8a8a;
}

/* ═══════════════════════════════════════════════════
   THEME TOGGLE OVERRIDE
   ═══════════════════════════════════════════════════ */
#btn-theme-toggle {
  bottom: 24px !important;
  left: 20px !important;
}

/* ═══════════════════════════════════════════════════
   SCROLLBARS
   ═══════════════════════════════════════════════════ */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--pink-300, #f4c4cd);
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover { background: var(--pink-400, #e4a1b3); }

body.theme-dark ::-webkit-scrollbar-thumb {
  background: rgba(244, 114, 182, 0.25);
}

/* ═══════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════ */
@keyframes kmFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════════════
   LOADING SKELETON
   ═══════════════════════════════════════════════════ */
.km-skeleton {
  background: linear-gradient(
    90deg,
    var(--pink-100, #fdecee) 25%,
    var(--pink-50, #fff7f8) 50%,
    var(--pink-100, #fdecee) 75%
  );
  background-size: 200% 100%;
  animation: skeletonPulse 1.5s ease-in-out infinite;
  border-radius: 8px;
}

body.theme-dark .km-skeleton {
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0.05) 25%,
    rgba(255,255,255,0.1) 50%,
    rgba(255,255,255,0.05) 75%
  );
  background-size: 200% 100%;
}

@keyframes skeletonPulse {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE — Tablet portrait (< 900px)
   ═══════════════════════════════════════════════════ */
@media (max-width: 900px) {
  :root {
    --km-left-w: 300px;
  }
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE — Mobile (< 768px): drawer mode
   ═══════════════════════════════════════════════════ */
@media (max-width: 767px) {

  body {
    overflow: hidden !important;
  }

  /* Show mobile toggle button */
  .km-panel-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Hide resize handle on mobile */
  #km-resize-handle { display: none; }

  /* Left panel becomes a slide-in drawer */
  #km-left-panel {
    position: fixed;
    top: var(--km-topbar-h);
    left: 0;
    bottom: 0;
    width: min(320px, 88vw) !important;
    min-width: unset !important;
    max-width: unset !important;
    z-index: 250;
    border-right: none;
    box-shadow: 4px 0 32px rgba(0,0,0,0.18);
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  }

  body.theme-dark #km-left-panel {
    box-shadow: 4px 0 32px rgba(0,0,0,0.5);
  }

  #km-left-panel.open {
    transform: translateX(0);
  }

  /* Right panel takes full width */
  #km-right-panel {
    width: 100%;
    padding: 14px 12px 80px;
  }

  #km-table-card {
    border-radius: 16px;
  }

  .tcard-header {
    padding: 12px 16px;
    font-size: 13px;
  }

  .table thead th,
  .table tbody td {
    padding: 10px 12px;
  }

  .src-name {
    font-size: 12px;
  }

  #btn-theme-toggle {
    bottom: 80px !important;
    left: 14px !important;
  }
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE — Small mobile (< 420px)
   ═══════════════════════════════════════════════════ */
@media (max-width: 420px) {

  #km-topbar {
    padding: 0 12px;
    gap: 6px;
  }

  #km-topbar .brand { font-size: 13px; }
  #km-topbar h1 { font-size: 13px; }

  #km-topbar .back-link {
    font-size: 12px;
    padding: 5px 10px;
  }

  #km-left-panel {
    width: 92vw !important;
  }

  #km-left-inner {
    padding: 16px 14px 80px;
  }

  .km-stat-card { padding: 14px 12px; }
  .km-stat-card .num { font-size: 24px; }

  #km-upload-card { padding: 16px 14px; }

  .btn-km {
    padding: 7px 12px;
    font-size: 12px;
  }
}

/* ═══════════════════════════════════════════════════
   LANDSCAPE MOBILE — thêm topbar compact
   ═══════════════════════════════════════════════════ */
@media (max-height: 500px) and (orientation: landscape) {
  :root { --km-topbar-h: 46px; }

  #km-topbar .brand,
  #km-topbar .sep {
    display: none;
  }

  #km-left-inner {
    padding: 12px 14px 60px;
  }

  .km-stats-row { gap: 8px; }
  .km-stat-card { padding: 12px 14px; }
  .km-stat-card .num { font-size: 22px; }
}