:root{
    --bg:#f5f6f8;
    --surface:#ffffff;
    --surface-soft:#fafbfc;
    --text:#1f2937;
    --muted:#6b7280;
    --line:#e5e7eb;
    --line-strong:#d1d5db;
    --primary:#2563eb;
    --primary-soft:#eff6ff;
    --success:#059669;
    --warning:#d97706;
    --danger:#dc2626;
    --shadow:0 8px 24px rgba(15,23,42,.06);
    --radius-xl:24px;
    --radius-lg:18px;
    --radius-md:14px;
    --radius-sm:10px;
}

*{box-sizing:border-box}

html,body{min-height:100%}

body{
    margin:0;
    font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.6;
}

a,button,input,select,textarea,summary{
    -webkit-tap-highlight-color:transparent;
}

a{
    color:inherit;
}

input,select,textarea,button{
    font:inherit;
}

input,select,textarea{
    width:100%;
    border:1px solid var(--line);
    border-radius:var(--radius-sm);
    background:#fff;
    color:var(--text);
    transition:border-color .18s ease, box-shadow .18s ease;
}

input,select{
    min-height:36px;
    padding:0 10px;
}

input[type="checkbox"]{
    width:15px;
    height:15px;
    min-height:15px;
    padding:0;
    border-radius:4px;
    flex:0 0 15px;
    accent-color:var(--primary);
    box-shadow:none;
}

input[type="checkbox"]:focus,
input[type="checkbox"]:focus-visible{
    box-shadow:0 0 0 2px rgba(37,99,235,.14);
}

textarea{
    min-height:110px;
    padding:12px;
    resize:vertical;
}

button{
    cursor:pointer;
}

input::placeholder,
textarea::placeholder{
    color:#9ca3af;
}

input:focus,
select:focus,
textarea:focus{
    outline:none;
    border-color:#93c5fd;
    box-shadow:0 0 0 3px rgba(37,99,235,.12);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible{
    outline:none;
    box-shadow:0 0 0 3px rgba(37,99,235,.12);
}

.card{
    margin:0;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow);
}

.eyebrow{
    font-size:12px;
    font-weight:700;
    letter-spacing:.12em;
    text-transform:uppercase;
    color:var(--muted);
}

.auth-shell{
    min-height:100vh;
    padding:28px;
    display:grid;
    place-items:center;
}

.auth-panel{
    width:min(420px,100%);
    display:grid;
    grid-template-columns:minmax(0,1fr);
    justify-content:center;
}

.auth-copy{
    padding:36px;
    border:1px solid var(--line);
    border-radius:var(--radius-xl);
    background:var(--surface);
    box-shadow:var(--shadow);
}

.auth-copy h1{
    margin:16px 0 12px;
    font-size:36px;
    line-height:1.2;
    letter-spacing:-.02em;
}

.auth-lead{
    margin:0;
    color:var(--muted);
    font-size:15px;
}

.auth-feature-list{
    display:grid;
    gap:12px;
    margin-top:24px;
}

.auth-feature{
    padding:14px 16px;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:var(--surface-soft);
    color:var(--text);
}

.auth-card{
    padding:28px;
    display:grid;
    gap:16px;
    align-content:start;
    width:100%;
}

.auth-card h2{
    margin:0;
    font-size:28px;
    line-height:1.2;
}

.panel-badge{
    display:inline-flex;
    align-items:center;
    min-height:32px;
    padding:0 12px;
    border:1px solid #dbeafe;
    border-radius:999px;
    background:var(--primary-soft);
    color:var(--primary);
    font-size:12px;
    font-weight:700;
}

.app-shell{
    display:grid;
    grid-template-columns:260px minmax(0,1fr);
    gap:20px;
    min-height:100vh;
    padding:20px;
}

.sidebar{
    position:sticky;
    top:20px;
    align-self:start;
    height:calc(100vh - 40px);
}

.sidebar-panel{
    height:100%;
    padding:18px;
    display:flex;
    flex-direction:column;
    gap:16px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-xl);
    box-shadow:var(--shadow);
}

.brand-lockup{
    display:flex;
    align-items:center;
    gap:12px;
    flex:0 0 auto;
}

.brand-mark{
    width:42px;
    height:42px;
    display:grid;
    place-items:center;
    border-radius:12px;
    background:#111827;
    color:#fff;
    font-weight:700;
}

.brand{
    font-size:20px;
    font-weight:700;
}

.brand-sub{
    font-size:12px;
    color:var(--muted);
    margin-top:2px;
}

.sidebar-group-title,
.sidebar-foot-label{
    font-size:12px;
    font-weight:700;
    letter-spacing:.1em;
    text-transform:uppercase;
    color:var(--muted);
}

.nav{
    display:flex;
    flex-direction:column;
    gap:4px;
    /* Cho phép cuộn khi menu dài hơn chiều cao sidebar */
    flex:1 1 auto;
    min-height:0;
    overflow-y:auto;
    overscroll-behavior:contain;
    padding-right:4px;
    margin-right:-4px;
}

.nav::-webkit-scrollbar{width:6px}
.nav::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:99px}
.nav::-webkit-scrollbar-thumb:hover{background:#9ca3af}

/* ==== Nhóm menu ==== */
.nav-group{
    border-radius:12px;
}

.nav-group-head{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:8px;
    padding:8px 10px;
    border:0;
    border-radius:10px;
    background:transparent;
    cursor:pointer;
    text-align:left;
}

.nav-group-head:hover{
    background:#f3f4f6;
}

.nav-group-title{
    font-size:11px;
    font-weight:700;
    letter-spacing:.09em;
    text-transform:uppercase;
    color:var(--muted);
}

.nav-group-caret{
    font-size:11px;
    color:var(--muted);
    transition:transform .18s ease;
}

.nav-group.is-open > .nav-group-head .nav-group-caret{
    transform:rotate(180deg);
}

.nav-group-items{
    display:none;
    flex-direction:column;
    gap:4px;
    padding:2px 0 6px;
}

.nav-group.is-open > .nav-group-items{
    display:flex;
}

/* Nhóm đang chứa trang hiện tại: nhấn nhẹ tiêu đề */
.nav-group.has-active > .nav-group-head .nav-group-title{
    color:var(--primary);
}

.nav a{
    display:grid;
    grid-template-columns:30px minmax(0,1fr);
    align-items:center;
    gap:10px;
    min-height:40px;
    padding:0 10px;
    border:1px solid transparent;
    border-radius:10px;
    text-decoration:none;
    color:#374151;
    font-size:14px;
}

.nav a:hover,
.nav a.active{
    background:var(--primary-soft);
    border-color:#dbeafe;
    color:var(--primary);
}

.nav-kicker{
    display:grid;
    place-items:center;
    width:30px;
    height:30px;
    border-radius:9px;
    background:#f3f4f6;
    font-size:14px;
    font-weight:700;
    color:var(--muted);
    line-height:1;
}

.nav a.active .nav-kicker{
    background:#fff;
}

.sidebar-footer{
    margin-top:auto;
    flex:0 0 auto;
    padding:14px;
    border:1px solid var(--line);
    border-radius:14px;
    background:var(--surface-soft);
}

.sidebar-foot-user{
    margin-top:6px;
    font-weight:700;
}

.sidebar-foot-note{
    margin-top:8px;
    color:var(--muted);
    font-size:13px;
}

.sidebar-footer-actions{
    display:grid;
    gap:8px;
    margin-top:12px;
}

.sidebar-footer-actions .btn{
    width:100%;
}

.main{
    min-width:0;
    display:grid;
    gap:16px;
    align-content:start;
}

.topbar{
    padding:24px;
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    gap:16px;
    align-items:center;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-xl);
    box-shadow:var(--shadow);
}

.title-row{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    align-items:center;
    margin-top:8px;
}

.title{
    font-size:32px;
    font-weight:700;
    line-height:1.15;
    letter-spacing:-.02em;
}

.page-chip{
    display:inline-flex;
    align-items:center;
    min-height:32px;
    padding:0 12px;
    border-radius:999px;
    background:#f3f4f6;
    color:#374151;
    font-size:12px;
    font-weight:700;
}

.sub,
.desc,
.muted{
    color:var(--muted);
}

.sub{
    margin-top:10px;
    font-size:14px;
}

.hero-actions{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:flex-end;
    gap:10px;
}

.user-pill,
.loading-indicator,
.picker-status{
    display:inline-flex;
    align-items:center;
    min-height:34px;
    padding:0 12px;
    border-radius:999px;
    font-size:12px;
    font-weight:700;
}

.user-pill{
    border:1px solid var(--line);
    background:#fff;
}

.loading-indicator{
    display:none;
    background:var(--primary-soft);
    color:var(--primary);
}

.loading-indicator.is-visible{
    display:inline-flex;
}

.overview-strip{
    display:grid;
    grid-template-columns:repeat(3, minmax(0,1fr));
    gap:14px;
}

.overview-tile{
    padding:18px 20px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow);
}

.overview-tile span{
    display:block;
    font-size:12px;
    font-weight:700;
    color:var(--muted);
    letter-spacing:.08em;
    text-transform:uppercase;
}

.overview-tile strong{
    display:block;
    margin-top:10px;
    font-size:20px;
}

.page-section{
    display:none;
    padding:24px;
    gap:16px;
}

.page-section.is-active{
    display:grid;
}

.section-header{
    display:flex;
    flex-wrap:wrap;
    justify-content:space-between;
    gap:12px;
    align-items:flex-start;
}

.section-header h2{
    margin:0;
    font-size:28px;
    line-height:1.2;
}

.feature-stack{
    display:grid;
    gap:16px;
}

.feature-grid{
    display:grid;
    gap:16px;
}

.feature-grid-2{
    grid-template-columns:repeat(2, minmax(0,1fr));
}

.activity-grid{
    align-items:start;
}

.activity-panel{
    min-height:0;
}

.activity-panel .list-panel{
    max-height:560px;
}

.panel-card{
    display:grid;
    gap:14px;
    padding:20px;
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    background:#fff;
    min-width:0;
}

/* Grid item mặc định min-width:auto nên nội dung rộng sẽ đẩy card phình ra
   thay vì co lại. Đặt min-width:0 để card tôn trọng bề rộng cột. */
.panel-card > *{
    min-width:0;
}

.panel-head{
    display:grid;
    gap:4px;
}

.panel-head h3{
    margin:0;
    font-size:18px;
    line-height:1.3;
}

.panel-span-full{
    grid-column:1 / -1;
}

.form-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit, minmax(220px,1fr));
    gap:14px;
    padding:16px;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:var(--surface-soft);
}

.form-field{
    display:flex;
    flex-direction:column;
    gap:6px;
}

.form-field label{
    font-size:13px;
    font-weight:700;
}

.hint{
    color:var(--muted);
    font-size:12px;
}

.time-group{
    display:grid;
    grid-template-columns:minmax(0,1fr) 120px;
    gap:8px;
}

.action-bar,
.row{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    align-items:center;
}

.row-tight{
    gap:8px;
}

.player-action-inline{
    display:flex;
    align-items:center;
    gap:8px;
    min-width:220px;
}

.player-action-inline select{
    flex:1 1 auto;
    width:auto;
    min-width:0;
}

.player-action-inline .btn{
    flex:0 0 auto;
    white-space:nowrap;
}

.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:34px;
    padding:0 12px;
    border:none;
    border-radius:10px;
    background:var(--primary);
    color:#fff;
    font-weight:700;
}

.btn.light{
    background:#fff;
    color:#374151;
    border:1px solid var(--line);
}

.btn.small{
    min-height:30px;
    padding:0 10px;
    font-size:13px;
}

.btn.gray{background:#4b5563}
.btn.on{background:var(--success)}
.btn.off{background:var(--warning)}
.btn.danger{background:var(--danger)}

.btn:disabled,
.btn[disabled]{
    opacity:.5;
    cursor:not-allowed;
}

.btn.is-loading{
    opacity:.75;
    cursor:wait;
    pointer-events:none;
}

.btn-spinner{
    display:inline-block;
    width:14px;
    height:14px;
    margin-right:8px;
    border:2px solid rgba(255,255,255,.45);
    border-top-color:#fff;
    border-radius:50%;
    animation:btn-spin .6s linear infinite;
    vertical-align:-2px;
}

.btn.light .btn-spinner{
    border-color:rgba(37,99,235,.25);
    border-top-color:var(--primary);
}

@keyframes btn-spin{
    to{ transform:rotate(360deg); }
}

.toolbar-note{
    padding:12px 14px;
    border:1px dashed var(--line-strong);
    border-radius:12px;
    background:var(--surface-soft);
    color:var(--muted);
    font-size:13px;
}

.advanced-input{
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:var(--surface-soft);
    overflow:hidden;
}

.advanced-input > summary{
    list-style:none;
    padding:14px 16px;
    cursor:pointer;
    font-weight:700;
    background:#fff;
}

.advanced-input > summary::-webkit-details-marker{
    display:none;
}

.advanced-input > .form-grid{
    margin:0;
    border-left:none;
    border-right:none;
    border-bottom:none;
    border-radius:0;
}

/* ==== Sub-tab trong trang (nhóm nhiều khối chức năng con cùng 1 nghiệp vụ) ==== */
.subtabs{
    display:flex;
    flex-wrap:wrap;
    gap:6px;
    padding:6px;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:var(--surface-soft);
}

.subtab-btn{
    display:inline-flex;
    align-items:center;
    gap:6px;
    min-height:36px;
    padding:0 14px;
    border:1px solid transparent;
    border-radius:calc(var(--radius-md) - 4px);
    background:transparent;
    color:var(--muted);
    font-weight:700;
    font-size:13px;
    cursor:pointer;
    transition:background .15s ease, color .15s ease, box-shadow .15s ease;
}

.subtab-btn:hover{
    background:#fff;
    color:var(--text);
}

.subtab-btn.is-active{
    background:#fff;
    color:var(--primary);
    border-color:var(--line);
    box-shadow:var(--shadow);
}

.subtab-panels{
    display:contents;
}

.subtab-panel{
    display:none;
    gap:16px;
}

.subtab-panel.is-active{
    display:grid;
}

.breadcrumb{
    font-size:12px;
    font-weight:700;
    letter-spacing:.06em;
    text-transform:uppercase;
    color:var(--muted);
}

.breadcrumb .crumb-sep{
    margin:0 6px;
    color:var(--line-strong);
}

.breadcrumb .crumb-current{
    color:var(--primary);
}

.picker{
    display:grid;
    gap:14px;
    padding:16px;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:var(--surface-soft);
}

.picker-head{
    display:flex;
    flex-wrap:wrap;
    justify-content:space-between;
    gap:10px;
    align-items:flex-start;
}

.picker-title{
    font-size:15px;
    font-weight:700;
}

.picker-sub{
    margin-top:4px;
    color:var(--muted);
    font-size:13px;
}

.picker-status{
    background:#fff;
    color:#374151;
    border:1px solid var(--line);
}

.picker-list{
    display:grid;
    gap:10px;
    max-height:280px;
    overflow:auto;
    padding:12px;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:#fff;
}

.picker-row{
    display:grid;
    grid-template-columns:minmax(0,1fr) 110px;
    gap:10px;
    align-items:center;
    padding:10px 12px;
    border:1px solid var(--line);
    border-radius:12px;
    background:var(--surface-soft);
}

.picker-row label{
    display:flex;
    align-items:center;
    gap:8px;
    min-width:0;
}

.picker-loading{
    padding:18px 12px;
    text-align:center;
    color:var(--muted);
}

.inline-check{
    display:inline-flex;
    align-items:center;
    gap:8px;
    min-height:34px;
    padding:0 10px;
    border:1px solid var(--line);
    border-radius:10px;
    background:#fff;
    color:var(--muted);
    font-size:13px;
}

.inline-check input[type="checkbox"],
.picker-row label input[type="checkbox"]{
    margin:0;
}

.list-panel{
    overflow:auto;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:#fff;
}

.tbl{
    width:100%;
    min-width:860px;
    border-collapse:collapse;
}

/* Bảng nằm trong cột hẹp (grid 2 cột) không đủ 860px nên sinh scroll ngang.
   Cho phép co lại và ngắt chữ thay vì tràn. */
.list-panel.compact{
    overflow-x:hidden;
}

.list-panel.compact .tbl{
    min-width:0;
    table-layout:fixed;
}

.list-panel.compact .tbl th,
.list-panel.compact .tbl td{
    padding:10px 8px;
    font-size:12px;
    overflow-wrap:anywhere;
    word-break:break-word;
}

.tbl th,
.tbl td{
    padding:12px 14px;
    border-bottom:1px solid var(--line);
    text-align:left;
    vertical-align:top;
    font-size:13px;
}

.tbl th{
    position:sticky;
    top:0;
    background:#fff;
    color:var(--muted);
    font-size:12px;
    font-weight:700;
}

.status{
    display:inline-flex;
    align-items:center;
    min-height:26px;
    padding:0 10px;
    border-radius:999px;
    font-size:12px;
    font-weight:700;
}

.status.on{
    background:#ecfdf5;
    color:var(--success);
}

.status.off{
    background:#fff7ed;
    color:var(--warning);
}

.status.neutral{
    background:#f3f4f6;
    color:#4b5563;
}

.status.danger-soft{
    background:#fef2f2;
    color:var(--danger);
}

.table-actions{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
}

/* Nút "Lấy mã" và thông báo kết quả trong ô thông tin lô */
.cell-pick{
    margin-top:8px;
}

.cell-pick-msg{
    display:block;
    margin-top:4px;
    font-size:11px;
    line-height:1.4;
    color:var(--muted);
    overflow-wrap:anywhere;
}

.cell-pick-msg.is-ok{
    color:var(--success);
    font-weight:700;
}

.cell-pick-msg.is-warn{
    color:var(--warning);
}

.cell-pick-msg.is-err{
    color:var(--danger);
}

.cell-title{
    font-weight:700;
}

.cell-sub{
    margin-top:4px;
    color:var(--muted);
    font-size:12px;
    line-height:1.55;
}

.cell-clamp{
    display:-webkit-box;
    -webkit-box-orient:vertical;
    -webkit-line-clamp:2;
    overflow:hidden;
    white-space:normal;
}

.text-mono{
    font-family:Consolas,"SFMono-Regular",Monaco,monospace;
}

.stats-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit, minmax(180px,1fr));
    gap:14px;
}

.stats-item{
    padding:18px;
    border:1px solid var(--line);
    border-radius:var(--radius-md);
    background:#fff;
}

.stats-label{
    font-size:12px;
    font-weight:700;
    color:var(--muted);
    letter-spacing:.08em;
    text-transform:uppercase;
}

.stats-value{
    margin-top:8px;
    font-size:30px;
    font-weight:700;
    line-height:1.1;
}

.stats-note{
    margin-top:8px;
    color:var(--muted);
    font-size:13px;
}

/* ==== Dashboard charts (Chart.js canvas wrapper) ==== */
.chart-box{
    position:relative;
    height:280px;
    width:100%;
}

.chart-box-donut{
    height:240px;
}

#activity_switches.form-grid,
#feature_switches.form-grid{
    padding:0;
    border:none;
    background:transparent;
}

.switch-card{
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:12px;
    padding:14px 16px;
    background:#fff;
}

.switch-copy{
    min-width:0;
}

.switch-title{
    font-weight:700;
}

.switch-input{
    width:18px;
    height:18px;
    flex:0 0 auto;
}

.result{
    display:grid;
    gap:12px;
}

.result-meta{
    display:flex;
    align-items:center;
    gap:10px;
    padding:12px 14px;
    border-radius:12px;
    border:1px solid var(--line);
    background:#fff;
}

.result-meta span{
    flex:0 0 auto;
    font-size:12px;
    font-weight:700;
    letter-spacing:.04em;
}

.result-meta strong{
    font-size:13px;
    font-weight:700;
}

.result-meta.success{
    border-color:#bbf7d0;
    background:#f0fdf4;
    color:#166534;
}

.result-meta.error{
    border-color:#fecaca;
    background:#fef2f2;
    color:#b91c1c;
}

.toast-message{
    position:fixed;
    top:24px;
    left:50%;
    transform:translateX(-50%) translateY(-20px);
    z-index:9999;
    max-width:min(480px, calc(100vw - 32px));
    padding:16px 24px;
    border-radius:16px;
    border:1px solid var(--line);
    background:#fff;
    box-shadow:0 20px 50px rgba(15,23,42,.18);
    font-size:15px;
    font-weight:700;
    text-align:center;
    opacity:0;
    pointer-events:none;
    transition:opacity .25s ease, transform .25s ease;
}

.toast-message.is-visible{
    opacity:1;
    transform:translateX(-50%) translateY(0);
    pointer-events:auto;
}

.toast-message.success{
    border-color:#bbf7d0;
    color:#166534;
    background:#f0fdf4;
}

.toast-message.error{
    border-color:#fecaca;
    color:#b91c1c;
    background:#fef2f2;
}

.modal-wrap{
    display:none;
    position:fixed;
    inset:0;
    z-index:1000;
}

.modal-wrap.is-open{
    display:block;
}

.modal-backdrop{
    position:absolute;
    inset:0;
    background:rgba(15,23,42,.28);
}

.modal-panel{
    position:relative;
    z-index:1;
    width:min(760px, calc(100vw - 24px));
    max-height:88vh;
    overflow:auto;
    margin:5vh auto 0;
    padding:18px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius-xl);
    box-shadow:0 18px 40px rgba(15,23,42,.16);
}

.modal-head,
.modal-foot{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:10px;
}

.modal-head{
    padding-bottom:14px;
    border-bottom:1px solid var(--line);
}

.modal-title{
    font-size:20px;
    font-weight:700;
}

.modal-body{
    display:grid;
    gap:14px;
    padding:16px 2px;
}

.modal-foot{
    justify-content:flex-end;
    padding-top:14px;
    border-top:1px solid var(--line);
}

@media (max-width:1100px){
    .app-shell{
        grid-template-columns:1fr;
    }

    .sidebar{
        position:static;
        height:auto;
    }

    /* Sidebar cao tự động: menu không cần vùng cuộn riêng */
    .nav{
        overflow-y:visible;
        flex:0 0 auto;
    }
}

@media (max-width:960px){
    .auth-panel{
        grid-template-columns:1fr;
    }

    .topbar{
        grid-template-columns:1fr;
    }

    .hero-actions{
        justify-content:flex-start;
    }

    .overview-strip,
    .feature-grid-2{
        grid-template-columns:1fr;
    }
}

@media (max-width:720px){
    .auth-shell,
    .app-shell{
        padding:14px;
    }

    .topbar,
    .page-section,
    .auth-copy,
    .auth-card,
    .sidebar-panel{
        padding:18px;
    }

    .title{
        font-size:28px;
    }

    .section-header h2{
        font-size:24px;
    }

    .form-grid{
        grid-template-columns:1fr;
    }

    .time-group,
    .picker-row{
        grid-template-columns:1fr;
    }

    .tbl{
        min-width:720px;
    }
}

@media (max-width:560px){
    .row .btn,
    .action-bar .btn,
    .row input,
    .row select,
    .inline-check{
        width:100%;
    }

    .hero-actions > *{
        width:100%;
        justify-content:center;
    }
}

@media (prefers-reduced-motion: reduce){
    *,
    *::before,
    *::after{
        animation:none !important;
        transition:none !important;
        scroll-behavior:auto !important;
    }
}

/* === Enhanced Mobile Responsive === */

/* Hamburger menu button - hidden on desktop */
.mobile-menu-btn{
    display:none;
    position:fixed;
    top:12px;
    left:12px;
    z-index:1100;
    width:44px;
    height:44px;
    border:0;
    border-radius:12px;
    background:#fff;
    box-shadow:0 4px 16px rgba(0,0,0,.12);
    cursor:pointer;
    align-items:center;
    justify-content:center;
}
.mobile-menu-btn span{
    display:block;
    width:20px;
    height:2px;
    background:#1f2937;
    border-radius:2px;
    margin:4px auto;
    transition:transform .2s ease, opacity .2s ease;
}
.mobile-menu-btn.is-open span:nth-child(1){transform:rotate(45deg) translate(4px,4px)}
.mobile-menu-btn.is-open span:nth-child(2){opacity:0}
.mobile-menu-btn.is-open span:nth-child(3){transform:rotate(-45deg) translate(4px,-4px)}

/* Mobile overlay for sidebar */
.mobile-overlay{
    display:none;
    position:fixed;
    inset:0;
    z-index:1050;
    background:rgba(0,0,0,.4);
    backdrop-filter:blur(2px);
}
.mobile-overlay.is-open{
    display:block;
}

@media (max-width:1100px){
    .mobile-menu-btn{
        display:flex;
    }
    .app-shell{
        grid-template-columns:1fr;
        padding-top:60px;
    }
    .sidebar{
        position:fixed;
        top:0;
        left:-280px;
        width:270px;
        height:100vh;
        z-index:1080;
        transition:left .25s ease;
        overflow-y:auto;
    }
    .sidebar.is-open{
        left:0;
    }
    .sidebar-panel{
        height:100%;
        border-radius:0;
    }
    /* User portal */
    .user-shell{
        grid-template-columns:1fr;
        padding-top:60px;
    }
    .user-sidebar{
        position:fixed;
        top:0;
        left:-280px;
        width:270px;
        height:100vh;
        z-index:1080;
        transition:left .25s ease;
        overflow-y:auto;
    }
    .user-sidebar.is-open{
        left:0;
    }
    .user-sidebar-panel{
        height:100%;
        border-radius:0;
    }
    .user-nav{
        display:grid;
        gap:4px;
    }
    .user-nav a{
        grid-template-columns:28px minmax(0,1fr);
        min-height:42px;
        font-size:14px;
        padding:0 10px;
    }
    .user-nav a .user-nav-icon{
        display:grid;
    }
    .sidebar-panel .nav a .nav-kicker{
        display:inline-flex;
    }
}

@media (max-width:720px){
    .list-panel{
        overflow-x:auto;
        -webkit-overflow-scrolling:touch;
    }
    .profile-grid{
        grid-template-columns:1fr;
    }
    .quick-actions{
        grid-template-columns:1fr 1fr;
    }
    .balance-card .balance-value{
        font-size:24px;
    }
    .user-hero-title{
        font-size:22px;
    }
    .user-topbar{
        grid-template-columns:1fr;
        padding:16px;
    }
    .user-hero-actions{
        justify-content:flex-start;
    }
    .overview-strip{
        grid-template-columns:1fr 1fr;
    }
}

@media (max-width:480px){
    .quick-actions{
        grid-template-columns:1fr;
    }
    .overview-strip{
        grid-template-columns:1fr;
    }
    .action-bar{
        flex-direction:column;
    }
    .action-bar .btn{
        width:100%;
    }
    .cdkey-input-group{
        grid-template-columns:1fr;
    }
}

/* Bộ chọn máy chủ trên thanh tiêu đề (multi-server) */
.server-switch{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:12px;background:rgba(255,255,255,.14);backdrop-filter:blur(4px);}
.server-switch label{font-size:13px;color:#fff;opacity:.9;white-space:nowrap;}
.server-switch select{appearance:none;border:1px solid rgba(255,255,255,.35);background:#fff;color:#111827;font-size:13px;font-weight:600;border-radius:8px;padding:6px 28px 6px 10px;cursor:pointer;min-width:150px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%236b7280' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;}
.server-switch select:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.25);}
@media (max-width:768px){.server-switch{width:100%;justify-content:space-between;}.server-switch select{flex:1;}}