:root {
    --color-bg: #f6f7f9;
    --color-surface: #ffffff;
    --color-border: #e5e7eb;
    --color-text: #1a1a1e;
    --color-text-muted: #6b7280;
    --color-primary: #2563eb;
    --color-primary-bg: #eff4ff;
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-warning: #d97706;
    --color-warning-bg: #fffbeb;
    --color-danger: #dc2626;
    --color-danger-bg: #fef2f2;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    font-size: 16px;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 24px 16px 48px;
}

.container--narrow {
    max-width: 480px;
    padding-top: 48px;
}

h1 { font-size: 1.5rem; margin: 0 0 20px; }
h2 { font-size: 1.05rem; margin: 32px 0 12px; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.03em; }

/* Nav */
.topbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
.topbar strong { font-size: 1.05rem; }
.topbar-links { display: flex; align-items: center; gap: 16px; font-size: 0.9rem; }
.topbar-links a { color: var(--color-text-muted); text-decoration: none; }
.topbar-links a:hover { color: var(--color-primary); }
.topbar-links button {
    background: none; border: none; color: var(--color-text-muted);
    font-size: 0.9rem; cursor: pointer; padding: 0; font-family: inherit;
}
.topbar-links button:hover { color: var(--color-danger); }

/* Cards */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}
.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 16px 18px;
}
.stat-card .label { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 6px; }
.stat-card .value { font-size: 1.4rem; font-weight: 600; }
.stat-card .value.danger { color: var(--color-danger); }
.stat-card .value.success { color: var(--color-success); }

/* Progress ring */
.progress-ring-wrap { display: flex; align-items: center; gap: 16px; }
.progress-ring-label { font-size: 1.3rem; font-weight: 600; }

/* Bar chart (pure CSS, no JS) */
.bar-chart { display: flex; flex-direction: column; gap: 10px; }
.bar-row { display: grid; grid-template-columns: 140px 1fr 90px; align-items: center; gap: 10px; font-size: 0.9rem; }
.bar-row .bar-label { color: var(--color-text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-track { background: var(--color-bg); border-radius: 6px; height: 10px; overflow: hidden; }
.bar-fill { background: var(--color-primary); height: 100%; border-radius: 6px; }
.bar-fill.success { background: var(--color-success); }
.bar-fill.danger { background: var(--color-danger); }
.bar-row .bar-value { text-align: right; color: var(--color-text-muted); }

/* Table */
table { width: 100%; border-collapse: collapse; background: var(--color-surface); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--color-border); font-size: 0.92rem; }
th { color: var(--color-text-muted); font-weight: 500; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.02em; }
tr:last-child td { border-bottom: none; }

/* Badge */
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 500; }
.badge-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-primary { background: var(--color-primary-bg); color: var(--color-primary); }
.badge-success { background: var(--color-success-bg); color: var(--color-success); }

/* App layout: sidebar + content */
.app-layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 230px;
    flex-shrink: 0;
    background: #16202e;
    color: #cbd5e1;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}
.sidebar-logo {
    padding: 18px 20px 14px;
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-logo span { color: #60a5fa; }
.sidebar-group {
    padding: 14px 20px 4px;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #64748b;
}
.sidebar a.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 20px;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.92rem;
    border-left: 3px solid transparent;
}
.sidebar a.nav-item:hover { background: rgba(255,255,255,0.05); color: #fff; }
.sidebar a.nav-item.active {
    background: rgba(37,99,235,0.18);
    color: #fff;
    border-left-color: var(--color-primary);
}
.sidebar .nav-icon { width: 18px; text-align: center; opacity: 0.85; }
.sidebar-footer {
    margin-top: auto;
    padding: 14px 20px;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 0.85rem;
}
.sidebar-footer .user-name { color: #fff; font-weight: 600; }
.sidebar-footer .user-role { color: #64748b; font-size: 0.75rem; }
.sidebar-footer form { margin: 8px 0 0; }
.sidebar-footer button {
    background: none; border: 1px solid rgba(255,255,255,0.2);
    color: #cbd5e1; font-size: 0.8rem; padding: 5px 12px; border-radius: 6px;
    width: 100%;
}
.sidebar-footer button:hover { border-color: var(--color-danger); color: #fca5a5; }
.app-main { flex: 1; min-width: 0; }
.app-main .container { max-width: 1100px; }

/* Mobile: sidebar trượt từ trái (off-canvas), topbar có nút ☰ */
.mobile-topbar { display: none; }
@media (max-width: 760px) {
    .app-layout { flex-direction: column; }
    .mobile-topbar {
        display: flex;
        align-items: center;
        gap: 12px;
        position: sticky;
        top: 0;
        z-index: 30;
        background: #16202e;
        padding: 10px 14px;
    }
    .mobile-topbar .nav-toggle {
        background: none;
        border: 1px solid rgba(255,255,255,0.2);
        color: #fff;
        font-size: 1.2rem;
        line-height: 1;
        padding: 6px 12px;
        border-radius: 8px;
    }
    .mobile-topbar .mobile-logo { font-size: 1.05rem; font-weight: 700; color: #fff; }
    .mobile-topbar .mobile-logo span { color: #60a5fa; }
    .sidebar {
        position: fixed;
        left: 0; top: 0; bottom: 0;
        width: 260px;
        height: 100vh;
        z-index: 40;
        transform: translateX(-100%);
        transition: transform 0.2s ease;
    }
    .sidebar.open { transform: none; }
    .sidebar-backdrop {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.45);
        z-index: 35;
    }
    .sidebar-backdrop.show { display: block; }
    .sidebar-footer { margin-top: auto; }
    .app-main .container { padding-top: 16px; }
}

/* Login page */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #16202e;
}
.login-card {
    background: var(--color-surface);
    border-radius: 14px;
    padding: 36px 32px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}
.login-card h1 { text-align: center; margin-bottom: 4px; }
.login-card .login-sub { text-align: center; color: var(--color-text-muted); font-size: 0.9rem; margin-bottom: 24px; }
.login-card label { display: block; font-size: 0.85rem; margin-bottom: 4px; color: var(--color-text-muted); }
.login-card input { width: 100%; margin-bottom: 14px; }
.login-error {
    background: var(--color-danger-bg); color: var(--color-danger);
    border-radius: 8px; padding: 10px 14px; font-size: 0.85rem; margin-bottom: 14px;
}

/* Page header inside app */
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.page-head h1 { margin: 0; }
.btn-sm {
    font-size: 0.8rem; padding: 6px 12px; border-radius: 6px;
    background: var(--color-primary); color: #fff; border: none; cursor: pointer;
    text-decoration: none; display: inline-block;
}
.btn-sm.btn-outline { background: none; border: 1px solid var(--color-border); color: var(--color-text); }
.btn-sm.btn-success { background: var(--color-success); }
.filter-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.filter-bar a {
    font-size: 0.82rem; padding: 5px 12px; border-radius: 999px;
    border: 1px solid var(--color-border); color: var(--color-text-muted); text-decoration: none;
    background: var(--color-surface);
}
.filter-bar a.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* Clock + calendar widget */
.clock-widget {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 14px 18px;
    margin-bottom: 24px;
}
.clock-main {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}
.clock-time {
    font-size: 1.8rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--color-primary);
    letter-spacing: 0.02em;
}
.clock-dates { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 170px; }
.clock-solar { font-weight: 500; }
.clock-lunar { font-size: 0.85rem; color: var(--color-text-muted); }
@media (max-width: 560px) {
    .clock-time { font-size: 1.4rem; }
    .clock-solar { font-size: 0.9rem; }
    .clock-lunar { font-size: 0.78rem; }
}

/* Lịch tháng (dương + âm, đánh dấu hôm nay) */
.cal-box { margin-top: 12px; border-top: 1px solid var(--color-border); padding-top: 12px; }
.cal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.cal-head .cal-title { font-weight: 600; }
.cal-head button {
    background: none; border: 1px solid var(--color-border);
    color: var(--color-text); font-size: 0.85rem; padding: 3px 12px; border-radius: 6px;
}
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; text-align: center; }
.cal-dow { font-size: 0.68rem; color: var(--color-text-muted); text-transform: uppercase; padding: 4px 0; }
.cal-cell {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 5px 2px 4px;
    min-height: 46px;
    background: var(--color-surface);
}
.cal-cell.empty { border: none; background: none; }
.cal-cell .sol { font-weight: 600; font-size: 0.92rem; line-height: 1.2; }
.cal-cell .lun { font-size: 0.65rem; color: var(--color-text-muted); }
.cal-cell.sun .sol { color: var(--color-danger); }
.cal-cell.today { background: var(--color-primary); border-color: var(--color-primary); }
.cal-cell.today .sol, .cal-cell.today .lun { color: #fff; }

/* Alerts list */
.alert-list { display: flex; flex-direction: column; gap: 8px; }
.alert-item {
    background: var(--color-warning-bg);
    border-left: 3px solid var(--color-warning);
    border-radius: 6px;
    padding: 10px 14px;
    font-size: 0.9rem;
}
.alert-item .alert-type { font-weight: 600; margin-right: 6px; }
.empty-state { color: var(--color-text-muted); font-size: 0.9rem; padding: 8px 0; }

/* Forms */
.field-row { display: flex; gap: 8px; margin-bottom: 12px; align-items: center; }
.field-row select { flex: 3; }
.field-row input { flex: 1; min-width: 0; }

/* Đặt hàng theo đơn vị quy đổi: mỗi dòng sản phẩm + đơn giá/thành tiền */
.order-row {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 10px;
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    flex-wrap: wrap;
}
.order-row-fields { display: flex; gap: 8px; flex: 1; min-width: 240px; }
.order-row-fields select:first-child { flex: 2; }
.order-row-fields select:nth-child(2) { flex: 1.3; }
.order-row-fields input { flex: 1; min-width: 60px; }
.order-row-price {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    min-width: 110px;
}
.order-row-price .js-line-total { font-weight: 600; color: var(--color-text); font-size: 1rem; }
.order-total {
    text-align: right;
    font-size: 1.15rem;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--color-border);
}

@media (max-width: 560px) {
    .order-row { flex-direction: column; align-items: stretch; }
    .order-row-fields { flex-direction: column; min-width: 0; }
    .order-row-price { flex-direction: row; justify-content: space-between; align-items: center; }
}
select, input[type=number], input[type=text], input[type=date] {
    font-size: 16px;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    box-sizing: border-box;
}

/* Form với label phía trên input, xếp dọc rõ ràng (thay cho field-row khi
   cần form nhập liệu đầy đủ như Sản phẩm/Nhập hàng/KPI) */
.stacked-form label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 18px 0 6px;
}
.stacked-form > label:first-child,
.stacked-form .form-grid:first-child label:first-of-type { margin-top: 0; }
.stacked-form select,
.stacked-form input[type=text],
.stacked-form input[type=number],
.stacked-form input[type=date] {
    width: 100%;
}
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 20px;
}
.form-hint { font-size: 0.82rem; color: var(--color-text-muted); margin-top: -2px; }
ul.errorlist { color: var(--color-danger); font-size: 0.82rem; margin: 4px 0 0; padding-left: 18px; list-style: disc; }
.unit-row {
    display: grid;
    grid-template-columns: 2fr 1fr auto;
    gap: 10px;
    align-items: center;
    margin-bottom: 10px;
}
.unit-row .delete-checkbox { display: flex; align-items: center; gap: 4px; font-size: 0.8rem; white-space: nowrap; }

@media (max-width: 560px) {
    .form-grid { grid-template-columns: 1fr; }
    .unit-row { grid-template-columns: 1fr; }
}
button, .btn {
    font-size: 16px;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    background: var(--color-primary);
    color: #fff;
    cursor: pointer;
}
button:hover, .btn:hover { opacity: 0.92; }
button.btn-block { width: 100%; margin-top: 8px; }

.success-card { text-align: center; padding: 32px 20px; }
.success-icon { font-size: 2.5rem; color: var(--color-success); margin-bottom: 8px; }

@media (max-width: 560px) {
    .bar-row { grid-template-columns: 90px 1fr 70px; font-size: 0.82rem; }
    table, thead, tbody, th, td, tr { display: block; }
    thead { display: none; }
    tr { border-bottom: 1px solid var(--color-border); padding: 8px 0; }
    td { border: none; padding: 4px 14px; }
    td::before { content: attr(data-label); display: inline-block; width: 110px; color: var(--color-text-muted); font-size: 0.78rem; }
}