/* =========================================
   QUẢN LÝ TASK - ĐIỆN THOẠI NHANH v3.0
   Style cho Web (table) + Mobile (cards)
   ========================================= */

:root {
    --bg-primary: #0a192f;
    --bg-secondary: #112240;
    --bg-card: #172a45;
    --text-primary: #ccd6f6;
    --text-secondary: #8892b0;
    --accent-color: #64ffda;
    --accent-hover: #45b298;
    --danger: #ff6b6b;
    --warning: #ffd166;
    --success: #06d6a0;
    --border-color: rgba(136, 146, 176, 0.2);
    --card-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --border-radius: 8px;
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
}

/* UTILS */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: .5rem; }
.gap-4 { gap: 1rem; }
.hidden { display: none !important; }

.btn {
    cursor: pointer;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    background: transparent;
    font-size: 14px;
    transition: var(--transition);
    font-family: inherit;
}
.btn:hover { background: rgba(100, 255, 218, 0.1); }
.btn-primary { background: var(--accent-color); color: var(--bg-primary); font-weight: 600; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: rgba(255, 107, 107, 0.1); }

/* ============ LOGIN ============ */
#login-screen {
    position: fixed; inset: 0;
    background: linear-gradient(135deg, #0a192f, #112240);
    display: flex; align-items: center; justify-content: center;
    z-index: 9999;
}
.login-box {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: 12px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.login-logo {
    display: flex; align-items: center; justify-content: center;
    gap: 10px;
    font-size: 22px;
    color: var(--accent-color);
    font-weight: bold;
    margin-bottom: 20px;
}
.auth-tabs { display: flex; margin-bottom: 20px; border-bottom: 2px solid var(--border-color); }
.auth-tab {
    flex: 1; padding: 10px;
    background: none; border: none;
    color: var(--text-secondary);
    font-size: 14px; cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
}
.auth-tab.active { color: var(--accent-color); border-bottom-color: var(--accent-color); }
.login-btn { width: 100%; padding: 12px; margin-top: 10px; }
.login-error {
    color: var(--danger);
    font-size: 13px; padding: 8px 12px;
    background: rgba(255,107,107,.1);
    border-radius: 4px; margin-top: 10px; text-align: center;
}

.form-group { margin-bottom: 15px; }
.form-label { display: block; margin-bottom: 6px; color: var(--accent-color); font-size: 13px; }
.form-input {
    width: 100%; padding: 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: inherit; font-size: 14px;
}
.form-input:focus { outline: 1px solid var(--accent-color); }

/* ============ APP LAYOUT ============ */
#app-container { display: flex; height: 100vh; width: 100vw; }

#sidebar {
    width: 240px;
    background: var(--bg-secondary);
    display: flex; flex-direction: column;
    padding: 20px;
    border-right: 1px solid var(--border-color);
}
.logo {
    font-size: 20px; font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 30px;
    display: flex; align-items: center; gap: 10px;
}
.logo h1 { font-size: 16px; }

.nav-item {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 14px;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--border-radius);
    margin-bottom: 6px;
    transition: var(--transition);
    font-size: 14px;
}
.nav-item:hover, .nav-item.active {
    background: rgba(100,255,218,.1);
    color: var(--accent-color);
}
.nav-item.active { border-left: 3px solid var(--accent-color); }
.nav-divider { height: 1px; background: var(--border-color); margin: 10px 0; }

.sidebar-actions { display: flex; flex-direction: column; gap: 6px; }
.nav-action-btn {
    color: var(--danger); cursor: pointer;
    font-size: 13px; padding: 8px 12px;
    display: flex; align-items: center; gap: 8px;
    border-radius: 4px;
}
.nav-action-btn:hover { background: rgba(255,107,107,.1); }
.nav-action-link {
    color: var(--text-secondary); cursor: pointer;
    font-size: 12px; padding: 6px 12px;
    display: flex; align-items: center; gap: 8px;
}
.nav-action-link:hover { color: var(--accent-color); }

#main-content {
    flex: 1;
    display: flex; flex-direction: column;
    overflow: hidden;
}

#top-bar {
    height: 64px; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.search-bar {
    background: var(--bg-card);
    border: none;
    padding: 9px 18px;
    border-radius: 20px;
    color: var(--text-primary);
    width: 280px;
    font-family: inherit;
}
.search-bar:focus { outline: 1px solid var(--accent-color); }

#current-user-display {
    display: flex; align-items: center; gap: 8px;
    padding: 6px 12px;
    background: rgba(100,255,218,.1);
    border-radius: 20px;
    font-size: 13px;
    color: var(--accent-color);
}

#view-controls {
    padding: 12px 24px;
    display: flex; gap: 10px; align-items: center;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}
.filter-select {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 4px;
    font-family: inherit; font-size: 13px;
    cursor: pointer;
}

/* ============ TABLE VIEW (chính) ============ */
.table-view {
    flex: 1;
    overflow: auto;
    padding: 16px 24px;
}

.table-wrapper {
    overflow-x: auto;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.task-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    min-width: 1200px;
}
.task-table thead th {
    background: var(--bg-card);
    color: var(--accent-color);
    text-align: left;
    padding: 12px 10px;
    font-weight: 600;
    font-size: 12px;
    position: sticky; top: 0;
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}
.task-table tbody td {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: top;
}
.task-table tbody tr {
    cursor: pointer;
    transition: background .15s;
}
.task-table tbody tr:hover { background: rgba(100,255,218,.04); }

.task-table .col-title {
    min-width: 220px; max-width: 320px;
    font-weight: 500;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
}
.badge-status-canlam   { background: rgba(255,209,102,.15); color: #ffd166; }
.badge-status-danglam  { background: rgba(59,130,246,.15); color: #60a5fa; }
.badge-status-choduyet { background: rgba(168,85,247,.15); color: #c084fc; }
.badge-status-hoanthanh{ background: rgba(6,214,160,.15); color: var(--success); }

.badge-prio-critical { color: var(--danger); }
.badge-prio-high     { color: #ff9f43; }
.badge-prio-medium   { color: var(--warning); }
.badge-prio-low      { color: var(--success); }

.badge-tag {
    background: rgba(100,255,218,.1);
    color: var(--accent-color);
    margin-right: 4px;
}

.deadline-overdue { color: var(--danger); font-weight: 600; }
.deadline-today { color: #60a5fa; font-weight: 600; }
.deadline-soon { color: var(--warning); }

.row-actions {
    display: flex; gap: 6px;
}
.btn-icon {
    background: transparent;
    border: none;
    width: 28px; height: 28px;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}
.btn-icon:hover { background: rgba(100,255,218,.1); color: var(--accent-color); }
.btn-icon.btn-icon-danger:hover { background: rgba(255,107,107,.1); color: var(--danger); }

/* ============ MOBILE CARDS ============ */
.mobile-cards {
    display: flex; flex-direction: column;
    gap: 10px;
}
.mobile-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 12px;
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-color);
    cursor: pointer;
}
.mobile-card.prio-critical { border-left-color: var(--danger); }
.mobile-card.prio-high     { border-left-color: #ff9f43; }
.mobile-card.prio-medium   { border-left-color: var(--warning); }
.mobile-card.prio-low      { border-left-color: var(--success); }

.mobile-card-header {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: 8px;
}
.mobile-card-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
    flex: 1;
    word-break: break-word;
}
.mobile-card-id { font-size: 10px; color: var(--text-secondary); }
.mobile-card-meta {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 10px;
    font-size: 12px;
    color: var(--text-secondary);
}
.mobile-card-meta span:nth-child(odd) { color: var(--text-secondary); }
.mobile-card-meta span:nth-child(even) { color: var(--text-primary); text-align: right; }

/* ============ KANBAN ============ */
#kanban-view {
    flex: 1;
    overflow: hidden;
    padding: 16px 24px;
}
.kanban-board {
    display: flex;
    gap: 14px;
    height: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 8px;
}
.kanban-column {
    flex: 1 1 0;
    min-width: 240px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 12px;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    max-height: 100%;
}
.kanban-column.drag-over {
    background: rgba(100, 255, 218, 0.05);
    border-color: var(--accent-color);
}
.kanban-column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border-color);
}
.kanban-column-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}
.kanban-column-count {
    background: var(--bg-card);
    color: var(--text-secondary);
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 11px;
}
.kanban-column[data-status="Cần làm"] .kanban-column-title { color: var(--warning); }
.kanban-column[data-status="Đang làm"] .kanban-column-title { color: #60a5fa; }
.kanban-column[data-status="Chờ duyệt"] .kanban-column-title { color: #c084fc; }
.kanban-column[data-status="Hoàn thành"] .kanban-column-title { color: var(--success); }

.kanban-cards {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-right: 4px;
}
.kanban-card {
    background: var(--bg-card);
    padding: 12px;
    border-radius: 6px;
    border-left: 3px solid var(--accent-color);
    cursor: grab;
    transition: transform .15s, box-shadow .15s;
    user-select: none;
}
.kanban-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,.25);
}
.kanban-card.dragging {
    opacity: .45;
    cursor: grabbing;
}
.kanban-card.prio-critical { border-left-color: var(--danger); }
.kanban-card.prio-high     { border-left-color: #ff9f43; }
.kanban-card.prio-medium   { border-left-color: var(--warning); }
.kanban-card.prio-low      { border-left-color: var(--success); }

.kanban-card-id {
    font-size: 10px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}
.kanban-card-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
    word-break: break-word;
}
.kanban-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 6px;
}
.kanban-card-author {
    display: flex;
    align-items: center;
    gap: 4px;
}
.kanban-card-tags {
    display: flex;
    gap: 3px;
    flex-wrap: wrap;
    margin-bottom: 6px;
}
.kanban-card .badge-tag {
    font-size: 9px;
    padding: 1px 6px;
}
.kanban-empty {
    text-align: center;
    color: var(--text-secondary);
    font-size: 11px;
    padding: 30px 10px;
    border: 1px dashed var(--border-color);
    border-radius: 6px;
}

/* ============ DASHBOARD ============ */
#dashboard-view { padding: 24px; overflow-y: auto; }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: var(--border-radius);
    display: flex; align-items: center; gap: 14px;
    border: 1px solid var(--border-color);
}
.stat-icon { font-size: 26px; color: var(--accent-color); }
.stat-number { font-size: 24px; font-weight: bold; color: var(--accent-color); }
.stat-label { font-size: 12px; color: var(--text-secondary); }
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}
.chart-box {
    background: var(--bg-secondary);
    padding: 18px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}
.chart-box h3 { margin-bottom: 12px; font-size: 14px; }
.chart-box canvas { max-height: 220px; }

/* ============ CALENDAR ============ */
#calendar-view { padding: 24px; overflow-y: auto; }
.cal-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 16px;
}
#calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}
.cal-day-cell {
    background: var(--bg-secondary);
    border-radius: 6px;
    min-height: 90px;
    padding: 6px;
    border: 1px solid transparent;
    font-size: 11px;
}
.cal-day-cell.today { border-color: var(--accent-color); }
.cal-day-number { font-weight: bold; color: var(--text-primary); font-size: 12px; }
.cal-task-dot {
    background: var(--bg-card);
    border-left: 2px solid var(--accent-color);
    padding: 2px 4px;
    margin-top: 3px;
    border-radius: 3px;
    font-size: 10px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    cursor: pointer;
}

/* ============ HISTORY ============ */
#history-view { padding: 24px; overflow-y: auto; }
.history-filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 10px;
    margin-bottom: 16px;
}
.history-table, .users-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}
.history-table th, .history-table td,
.users-table th, .users-table td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 13px;
}
.history-table th, .users-table th {
    background: var(--bg-card);
    color: var(--accent-color);
    font-size: 12px;
    font-weight: 600;
}
.history-table tr:hover, .users-table tr:hover { background: rgba(100,255,218,.04); }
.action-add { color: var(--success); }
.action-edit { color: var(--warning); }
.action-delete { color: var(--danger); }

#users-view { padding: 24px; overflow-y: auto; }

/* ============ MODALS ============ */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(10,25,47,.85);
    display: flex; justify-content: center; align-items: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
    padding: 20px;
}
.modal-content {
    background: var(--bg-secondary);
    width: 600px; max-width: 100%; max-height: 92vh;
    padding: 28px;
    border-radius: var(--border-radius);
    overflow-y: auto;
    position: relative;
    border: 1px solid var(--border-color);
}
.close-btn {
    position: absolute; top: 14px; right: 18px;
    font-size: 22px; cursor: pointer;
    color: var(--text-secondary);
}
.close-btn:hover { color: var(--accent-color); }

.modal-header-row {
    display: flex; align-items: center; gap: 10px;
    margin-bottom: 18px;
}
.modal-header-row h2 { color: var(--accent-color); font-size: 18px; }
.btn-icon-delete {
    background: transparent;
    border: none;
    color: var(--danger);
    font-size: 16px;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 4px;
}
.btn-icon-delete:hover { background: rgba(255,107,107,.15); }

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

/* ============ MULTI-SELECT (Người hỗ trợ) ============ */
.multiselect {
    position: relative;
}
.multiselect-box {
    min-height: 40px;
    width: 100%;
    padding: 6px 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    align-items: center;
    font-size: 13px;
}
.multiselect-box:hover {
    border-color: var(--accent-color);
}
.multiselect-box.open {
    border-color: var(--accent-color);
    outline: 1px solid var(--accent-color);
}
.multiselect-placeholder {
    color: var(--text-secondary);
    font-size: 13px;
}
.multiselect-chip {
    background: rgba(100,255,218,0.15);
    color: var(--accent-color);
    padding: 3px 8px 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.multiselect-chip .chip-x {
    cursor: pointer;
    width: 16px; height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background .15s;
}
.multiselect-chip .chip-x:hover {
    background: rgba(255,107,107,.3);
    color: var(--danger);
}
.multiselect-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--accent-color);
    border-radius: 4px;
    max-height: 240px;
    overflow-y: auto;
    z-index: 100;
    margin-top: 4px;
    box-shadow: 0 8px 20px rgba(0,0,0,.4);
}
.multiselect-search {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: none;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 13px;
    outline: none;
}
.multiselect-item {
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-primary);
}
.multiselect-item:hover {
    background: rgba(100,255,218,0.08);
}
.multiselect-item input[type="checkbox"] {
    width: 16px; height: 16px;
    accent-color: var(--accent-color);
    margin: 0;
}
.multiselect-item .ms-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}
.multiselect-item.selected {
    background: rgba(100,255,218,0.06);
    color: var(--accent-color);
}
.multiselect-empty {
    padding: 10px 12px;
    color: var(--text-secondary);
    font-size: 12px;
    font-style: italic;
    text-align: center;
}

/* Subtasks */
#subtasks-container { max-height: 200px; overflow-y: auto; margin-bottom: 8px; }
.subtask-item {
    display: flex; align-items: center; gap: 8px;
    padding: 6px 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 5px;
}
.subtask-item input[type="checkbox"] {
    width: 16px; height: 16px;
    accent-color: var(--accent-color);
}
.subtask-item input[type="text"] {
    flex: 1; background: transparent; border: none;
    color: var(--text-primary); font-size: 13px; outline: none;
}
.subtask-item.done input[type="text"] { text-decoration: line-through; opacity: .5; }
.subtask-item .remove {
    background: transparent; border: none;
    color: var(--danger); cursor: pointer; opacity: .5;
}
.subtask-item:hover .remove { opacity: 1; }
.btn-add-subtask {
    background: transparent;
    border: 1px dashed var(--border-color);
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
    width: 100%; font-size: 12px;
}
.btn-add-subtask:hover { border-color: var(--accent-color); color: var(--accent-color); }

.confirm-popup {
    background: var(--bg-card);
    padding: 28px;
    border-radius: var(--border-radius);
    text-align: center;
    max-width: 400px;
    border: 1px solid var(--accent-color);
}
.confirm-actions { display: flex; justify-content: center; gap: 16px; margin-top: 18px; }

/* LOADER */
#loading-screen {
    position: fixed; inset: 0;
    background: var(--bg-primary);
    display: flex; flex-direction: column;
    justify-content: center; align-items: center;
    z-index: 2000;
}
.loader {
    width: 46px; height: 46px;
    border: 3px solid rgba(100,255,218,.3);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s ease-in-out infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-card); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-color); }

/* ============ RESPONSIVE ============ */
.desktop-only { display: block; }
.mobile-only { display: none; }

@media (max-width: 768px) {
    body { overflow: auto; }

    /* Sidebar -> bottom nav */
    #app-container { flex-direction: column; }
    #sidebar {
        width: 100%; height: 56px;
        flex-direction: row;
        justify-content: space-around;
        padding: 4px 8px;
        position: fixed; bottom: 0; left: 0;
        z-index: 900;
        border-right: none;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 -3px 12px rgba(0,0,0,.4);
    }
    #sidebar .logo, #sidebar .nav-divider,
    #sidebar > div[style*="flex:1"],
    #sidebar > div[style*="padding"]:last-child,
    #sidebar .sidebar-actions .nav-action-link { display: none; }

    .nav-item {
        flex-direction: column;
        justify-content: center;
        gap: 2px;
        font-size: 9px;
        padding: 4px;
        flex: 1;
        margin: 0;
        background: transparent !important;
        border-radius: 0;
    }
    .nav-item.active { border-left: none; border-top: 2px solid var(--accent-color); }
    .nav-item i { font-size: 16px; }
    .sidebar-actions { flex-direction: row; }
    .nav-action-btn { flex-direction: column; font-size: 9px; padding: 4px; gap: 2px; }
    .nav-action-btn i { font-size: 16px; }

    /* Bottom padding for nav */
    #main-content { padding-bottom: 60px; }

    /* Top bar */
    #top-bar { height: auto; padding: 10px 14px; flex-wrap: wrap; gap: 8px; }
    .search-bar { flex: 1; min-width: 0; width: auto; font-size: 14px; }

    /* Floating add button */
    #btn-add-task {
        position: fixed; bottom: 70px; right: 16px;
        width: 52px; height: 52px;
        border-radius: 50%;
        padding: 0;
        font-size: 0;
        box-shadow: 0 4px 14px rgba(0,0,0,.4);
        z-index: 800;
    }
    #btn-add-task i { font-size: 22px; margin: 0; }
    #current-user-display span:not(.fa-user-circle) { display: none; }

    /* View controls */
    #view-controls {
        padding: 8px 14px;
        gap: 6px;
        overflow-x: auto;
        flex-wrap: nowrap;
    }
    .filter-select { font-size: 12px; padding: 5px 8px; flex-shrink: 0; }

    /* ⭐ TABLE → CARDS trên mobile */
    .desktop-only { display: none; }
    .mobile-only { display: block; }
    .table-view { padding: 12px; }

    /* Dashboard charts */
    .charts-container { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .stat-card { padding: 12px; }
    .stat-number { font-size: 20px; }
    .stat-icon { font-size: 22px; }

    /* Modal full screen */
    .modal-content {
        width: 100%; height: 100%; max-height: 100%;
        border-radius: 0;
        padding: 20px;
    }
    .grid-2 { grid-template-columns: 1fr; }

    /* Kanban mobile - cột nhỏ scroll ngang */
    #kanban-view { padding: 12px; }
    .kanban-column {
        min-width: 80vw;
        flex: 0 0 80vw;
        scroll-snap-align: center;
    }
    .kanban-board { scroll-snap-type: x mandatory; }

    /* Calendar nhỏ lại */
    #calendar-view { padding: 12px; }
    .cal-day-cell { min-height: 60px; padding: 4px; font-size: 9px; }
    .cal-day-number { font-size: 10px; }
    .cal-task-dot { font-size: 9px; padding: 1px 3px; }

    /* Users table horizontal scroll */
    #users-view, #history-view { padding: 12px; }
    .users-table, .history-table { font-size: 11px; min-width: 600px; }
    .users-table th, .users-table td,
    .history-table th, .history-table td { padding: 6px; }
}