/* ==========================================================================
   Category Tree Manager — Styles
   ========================================================================== */

:root {
    --ctm-primary: #667eea;
    --ctm-primary-dark: #5a67d8;
    --ctm-secondary: #764ba2;
    --ctm-accent: #02d0bd;
    --ctm-success: #10b981;
    --ctm-warning: #f59e0b;
    --ctm-danger: #ef4444;
    --ctm-bg: #f0f2f5;
    --ctm-card: #ffffff;
    --ctm-text: #1e293b;
    --ctm-muted: #64748b;
    --ctm-border: #e2e8f0;
    --ctm-radius: 12px;
    --ctm-shadow: 0 1px 3px rgba(0,0,0,0.06);
    --ctm-shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --ctm-transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== PAGE ===== */
.ctm-page { background: var(--ctm-bg); padding: 1.5rem 2rem 3rem; min-height: 100vh; }

/* ===== HEADER ===== */
.ctm-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; flex-wrap: wrap; gap: 10px; }
.ctm-header-left { display: flex; align-items: center; gap: 14px; }
.ctm-header h1 { font-size: 1.35rem; font-weight: 700; color: var(--ctm-text); margin: 0; display: flex; align-items: center; gap: 10px; }
.ctm-header h1 i { font-size: 1.15rem; color: var(--ctm-primary); }
.ctm-header-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.ctm-stats { display: flex; gap: 8px; }
.ctm-stat { display: inline-flex; align-items: center; gap: 5px; padding: 5px 14px; border-radius: 20px; font-size: 0.78rem; font-weight: 600; }
.ctm-stat--linked { background: rgba(16,185,129,0.1); color: #059669; }
.ctm-stat--unlinked { background: rgba(239,68,68,0.1); color: #dc2626; }
.ctm-btn-back { display: inline-flex; align-items: center; gap: 6px; padding: 7px 16px; border-radius: 8px; border: 1.5px solid var(--ctm-border); background: var(--ctm-card); color: var(--ctm-muted); text-decoration: none; font-size: 0.85rem; font-weight: 500; transition: var(--ctm-transition); }
.ctm-btn-back:hover { border-color: var(--ctm-primary); color: var(--ctm-primary); }

/* ===== EDIT MODE SWITCH ===== */
.ctm-edit-switch { display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border-radius: 22px; background: var(--ctm-card); border: 1.5px solid var(--ctm-border); font-size: 0.82rem; font-weight: 600; color: var(--ctm-muted); cursor: pointer; transition: var(--ctm-transition); user-select: none; }
.ctm-edit-switch:hover { border-color: var(--ctm-primary); }
.ctm-edit-switch.active { background: linear-gradient(135deg, var(--ctm-primary), var(--ctm-secondary)); color: #fff; border-color: transparent; box-shadow: 0 4px 14px rgba(102,126,234,0.3); }
.ctm-edit-switch .ctm-switch-track { position: relative; width: 36px; height: 20px; border-radius: 10px; background: #cbd5e1; transition: var(--ctm-transition); flex-shrink: 0; }
.ctm-edit-switch.active .ctm-switch-track { background: rgba(255,255,255,0.35); }
.ctm-edit-switch .ctm-switch-thumb { position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,0.2); transition: var(--ctm-transition); }
.ctm-edit-switch.active .ctm-switch-thumb { left: 18px; }

/* ===== 2 COLUMN LAYOUT ===== */
.ctm-body { display: grid; grid-template-columns: 1fr 380px; gap: 1.5rem; align-items: start; }
@media (max-width: 1024px) { .ctm-body { grid-template-columns: 1fr; } }

/* ===== CARD ===== */
.ctm-card { background: var(--ctm-card); border-radius: var(--ctm-radius); box-shadow: var(--ctm-shadow); border: 1px solid var(--ctm-border); overflow: hidden; }
.ctm-card-header { padding: 14px 20px; border-bottom: 1px solid var(--ctm-border); display: flex; align-items: center; justify-content: space-between; background: #fafbfc; }
.ctm-card-title { font-size: 0.9rem; font-weight: 700; color: var(--ctm-text); margin: 0; display: flex; align-items: center; gap: 8px; }
.ctm-card-title i { color: var(--ctm-primary); font-size: 0.85rem; }
.ctm-card-body { padding: 16px 20px; max-height: 75vh; overflow-y: auto; }

/* ===== CATEGORY TREE ===== */
.ctm-tree-node { margin-bottom: 2px; }
.ctm-tree-header { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 8px; cursor: pointer; transition: var(--ctm-transition); user-select: none; position: relative; }
.ctm-tree-header:hover { background: rgba(102,126,234,0.05); }
.ctm-tree-toggle { font-size: 0.55rem; color: var(--ctm-muted); transition: transform 0.2s; min-width: 12px; }
.ctm-tree-toggle.open { transform: rotate(90deg); }
.ctm-tree-icon { font-size: 0.8rem; color: var(--ctm-primary); }
.ctm-tree-name { font-size: 0.85rem; font-weight: 600; color: var(--ctm-text); flex: 1; }
.ctm-tree-count { font-size: 0.7rem; font-weight: 700; padding: 2px 7px; border-radius: 10px; background: rgba(102,126,234,0.1); color: var(--ctm-primary); }
.ctm-tree-children { padding-left: 18px; display: none; }
.ctm-tree-children.open { display: block; }

/* ===== TREE EDIT ACTIONS ===== */
.ctm-tree-actions { display: none; align-items: center; gap: 3px; margin-left: auto; }
body.ctm-edit-mode .ctm-tree-actions { display: flex; }
.ctm-tree-act { width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; border-radius: 6px; border: none; cursor: pointer; font-size: 0.7rem; transition: var(--ctm-transition); padding: 0; background: transparent; color: var(--ctm-muted); }
.ctm-tree-act:hover { transform: scale(1.1); }
.ctm-tree-act--edit:hover { background: rgba(102,126,234,0.1); color: var(--ctm-primary); }
.ctm-tree-act--add:hover { background: rgba(16,185,129,0.1); color: var(--ctm-success); }
.ctm-tree-act--delete:hover { background: rgba(239,68,68,0.1); color: var(--ctm-danger); }

/* ===== ADD CATEGORY FORM ===== */
.ctm-add-form { display: none; }
body.ctm-edit-mode .ctm-add-form { display: block; }
.ctm-add-row { display: flex; gap: 8px; align-items: center; padding: 10px 0; }
.ctm-add-row input { flex: 1; padding: 7px 12px; border: 1.5px solid var(--ctm-border); border-radius: 8px; font-size: 0.85rem; transition: var(--ctm-transition); }
.ctm-add-row input:focus { outline: none; border-color: var(--ctm-primary); box-shadow: 0 0 0 3px rgba(102,126,234,0.1); }
.ctm-add-row select { padding: 7px 10px; border: 1.5px solid var(--ctm-border); border-radius: 8px; font-size: 0.82rem; background: #fff; }
.ctm-add-row select:focus { outline: none; border-color: var(--ctm-primary); }
.ctm-add-btn { display: inline-flex; align-items: center; gap: 5px; padding: 7px 16px; border-radius: 8px; border: none; font-size: 0.82rem; font-weight: 600; cursor: pointer; transition: var(--ctm-transition); background: var(--ctm-success); color: #fff; white-space: nowrap; }
.ctm-add-btn:hover { box-shadow: 0 4px 12px rgba(16,185,129,0.25); transform: translateY(-1px); }

/* ===== INLINE RENAME ===== */
.ctm-rename-input { padding: 3px 8px; border: 1.5px solid var(--ctm-primary); border-radius: 6px; font-size: 0.85rem; font-weight: 600; color: var(--ctm-text); background: #fff; outline: none; box-shadow: 0 0 0 3px rgba(102,126,234,0.12); width: 180px; }

/* ===== DROP ZONE ===== */
.ctm-drop-zone { min-height: 32px; border: 2px dashed transparent; border-radius: 8px; padding: 4px 6px; margin: 4px 0; transition: var(--ctm-transition); }
.ctm-drop-zone.drag-over { border-color: var(--ctm-primary); background: rgba(102,126,234,0.06); box-shadow: inset 0 0 0 1px rgba(102,126,234,0.15); }

/* ===== BUTTON CHIPS ===== */
.ctm-btn-chip { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border-radius: 20px; font-size: 0.78rem; font-weight: 500; background: rgba(16,185,129,0.08); color: #065f46; margin: 2px; cursor: grab; transition: var(--ctm-transition); border: 1.5px solid transparent; max-width: 100%; }
.ctm-btn-chip:hover { background: rgba(16,185,129,0.15); box-shadow: 0 2px 8px rgba(16,185,129,0.15); }
.ctm-btn-chip:active, .ctm-btn-chip.dragging { cursor: grabbing; opacity: 0.6; transform: scale(0.95); }
.ctm-btn-chip .ctm-chip-remove { display: inline-flex; align-items: center; justify-content: center; width: 16px; height: 16px; border-radius: 50%; background: rgba(239,68,68,0.15); color: var(--ctm-danger); font-size: 0.55rem; cursor: pointer; transition: var(--ctm-transition); border: none; padding: 0; margin-left: 2px; }
.ctm-btn-chip .ctm-chip-remove:hover { background: var(--ctm-danger); color: #fff; }

/* ===== UNLINKED POOL ===== */
.ctm-pool-search { padding: 12px 16px; border-bottom: 1px solid var(--ctm-border); }
.ctm-pool-search input { width: 100%; padding: 8px 12px 8px 34px; border: 1.5px solid var(--ctm-border); border-radius: 8px; font-size: 0.85rem; transition: var(--ctm-transition); background: var(--ctm-bg); }
.ctm-pool-search input:focus { outline: none; border-color: var(--ctm-primary); box-shadow: 0 0 0 3px rgba(102,126,234,0.1); background: #fff; }
.ctm-pool-search-wrap { position: relative; }
.ctm-pool-search-wrap i { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); color: var(--ctm-muted); font-size: 0.8rem; }
.ctm-pool-group { margin-bottom: 8px; }
.ctm-pool-group-title { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ctm-muted); padding: 6px 8px 4px; }
.ctm-pool-chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 20px; font-size: 0.78rem; font-weight: 500; background: rgba(239,68,68,0.06); color: #991b1b; border: 1.5px dashed rgba(239,68,68,0.25); margin: 3px; cursor: grab; transition: var(--ctm-transition); }
.ctm-pool-chip:hover { background: rgba(239,68,68,0.12); border-color: rgba(239,68,68,0.4); box-shadow: 0 2px 8px rgba(239,68,68,0.1); }
.ctm-pool-chip:active, .ctm-pool-chip.dragging { cursor: grabbing; opacity: 0.5; transform: scale(0.95); }
.ctm-pool-chip i { font-size: 0.65rem; }

/* ===== EMPTY / TOAST ===== */
.ctm-empty { text-align: center; padding: 2rem 1rem; color: var(--ctm-muted); }
.ctm-empty i { font-size: 2rem; opacity: 0.3; margin-bottom: 8px; }
.ctm-empty p { font-size: 0.85rem; margin: 0; }
.ctm-toast { position: fixed; bottom: 24px; right: 24px; padding: 12px 20px; border-radius: 10px; font-size: 0.85rem; font-weight: 500; color: #fff; z-index: 9999; opacity: 0; transform: translateY(10px); transition: all 0.3s ease; pointer-events: none; box-shadow: 0 8px 25px rgba(0,0,0,0.15); }
.ctm-toast.show { opacity: 1; transform: translateY(0); }
.ctm-toast--success { background: var(--ctm-success); }
.ctm-toast--error { background: var(--ctm-danger); }
.ctm-toast--warning { background: var(--ctm-warning); }

/* ===== BULK BAR ===== */
.ctm-bulk-bar { display: none; align-items: center; gap: 10px; padding: 10px 16px; background: linear-gradient(135deg, var(--ctm-primary), var(--ctm-secondary)); border-radius: 10px; margin-bottom: 1rem; color: #fff; font-size: 0.85rem; }
.ctm-bulk-bar.show { display: flex; }
.ctm-bulk-bar select { padding: 5px 10px; border-radius: 6px; border: 1px solid rgba(255,255,255,0.3); background: rgba(255,255,255,0.15); color: #fff; font-size: 0.82rem; }
.ctm-bulk-bar select option { color: var(--ctm-text); background: #fff; }
.ctm-bulk-bar button { padding: 5px 14px; border-radius: 6px; border: 1.5px solid rgba(255,255,255,0.4); background: rgba(255,255,255,0.15); color: #fff; font-weight: 600; font-size: 0.82rem; cursor: pointer; transition: var(--ctm-transition); }
.ctm-bulk-bar button:hover { background: rgba(255,255,255,0.3); }

/* ===== CONFIRM MODAL ===== */
.ctm-modal-backdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 9990; }
.ctm-modal-backdrop.show { display: flex; align-items: center; justify-content: center; }
.ctm-modal { background: #fff; border-radius: var(--ctm-radius); box-shadow: 0 20px 60px rgba(0,0,0,0.2); width: 420px; max-width: 90vw; overflow: hidden; }
.ctm-modal-header { padding: 16px 20px; border-bottom: 1px solid var(--ctm-border); display: flex; align-items: center; gap: 10px; }
.ctm-modal-header i { font-size: 1.1rem; }
.ctm-modal-header h4 { margin: 0; font-size: 1rem; font-weight: 700; color: var(--ctm-text); }
.ctm-modal-body { padding: 20px; font-size: 0.9rem; color: var(--ctm-text); }
.ctm-modal-body .ctm-modal-warn { display: flex; gap: 8px; padding: 10px 14px; background: rgba(239,68,68,0.06); border: 1px solid rgba(239,68,68,0.15); border-radius: 8px; font-size: 0.82rem; color: #991b1b; margin-top: 10px; }
.ctm-modal-footer { padding: 14px 20px; border-top: 1px solid var(--ctm-border); display: flex; justify-content: flex-end; gap: 8px; }
.ctm-modal-btn { padding: 8px 18px; border-radius: 8px; border: none; font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: var(--ctm-transition); }
.ctm-modal-btn--cancel { background: var(--ctm-bg); color: var(--ctm-muted); }
.ctm-modal-btn--cancel:hover { background: #e2e8f0; }
.ctm-modal-btn--danger { background: var(--ctm-danger); color: #fff; }
.ctm-modal-btn--danger:hover { box-shadow: 0 4px 12px rgba(239,68,68,0.3); }

/* ===== PAGINATION ===== */
.ctm-pool-pagination { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--ctm-border); }
.ctm-pool-pagination button { padding: 5px 12px; border-radius: 6px; border: 1.5px solid var(--ctm-border); background: var(--ctm-card); color: var(--ctm-muted); font-size: 0.8rem; font-weight: 500; cursor: pointer; transition: var(--ctm-transition); }
.ctm-pool-pagination button:hover:not(:disabled) { border-color: var(--ctm-primary); color: var(--ctm-primary); }
.ctm-pool-pagination button:disabled { opacity: 0.4; cursor: not-allowed; }
.ctm-pool-pagination .ctm-page-info { font-size: 0.78rem; color: var(--ctm-muted); font-weight: 500; }

/* ===== LOADING SPINNER ===== */
.ctm-loading { text-align: center; padding: 2rem; }
.ctm-loading .spinner { display: inline-block; width: 28px; height: 28px; border: 3px solid var(--ctm-border); border-top-color: var(--ctm-primary); border-radius: 50%; animation: ctm-spin 0.7s linear infinite; }
@keyframes ctm-spin { to { transform: rotate(360deg); } }