/* ==========================================================
   Quan ly Tai san - Stylesheet chinh
   Ngon ngu thiet ke: hien dai, toi gian, dang tin cay,
   mobile-first, khong qua nhieu mau sac.
   ========================================================== */

:root {
    --color-bg: #f4f6fa;
    --color-surface: #ffffff;
    --color-sidebar: #14181f;
    --color-sidebar-hover: #1f2530;
    --color-border: #e6e9ef;
    --color-text: #1a1d24;
    --color-text-muted: #6b7280;
    --color-primary: #2f6fed;
    --color-primary-dark: #1f4fc4;
    --color-success: #16a34a;
    --color-danger: #dc2626;
    --color-warning: #d97706;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-card: 0 1px 2px rgba(16, 24, 40, 0.05), 0 1px 3px rgba(16, 24, 40, 0.06);
    --sidebar-width: 240px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* ---------- Shell layout ---------- */
.app-shell {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--color-sidebar);
    color: #cbd2e0;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 40;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 22px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.brand-icon {
    font-size: 22px;
    color: var(--color-primary);
}

.brand-name {
    font-weight: 600;
    font-size: 15px;
    color: #fff;
}

.brand-tagline {
    font-size: 11.5px;
    color: #838da3;
    margin-top: 1px;
}

.sidebar-nav {
    flex: 1;
    padding: 14px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    font-size: 13.5px;
    font-weight: 500;
    color: #b6bdcc;
    width: 100%;
    background: transparent;
    border: none;
    text-align: left;
}

.nav-item:hover {
    background: var(--color-sidebar-hover);
    color: #fff;
}

.nav-item.is-active {
    background: var(--color-primary);
    color: #fff;
}

.nav-icon {
    font-size: 15px;
    width: 18px;
    text-align: center;
}

.sidebar-logout {
    padding: 12px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.nav-item--button { font-size: 13.5px; }

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 28px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 30;
}

.topbar-user { display: flex; align-items: center; gap: 10px; }

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.user-name { font-weight: 600; font-size: 13.5px; }
.user-role { font-size: 11.5px; color: var(--color-text-muted); }

.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--color-text-muted);
}
.lang-switch a { padding: 4px 6px; border-radius: 6px; }
.lang-switch a.is-active { background: var(--color-bg); color: var(--color-primary); }

.content-area {
    padding: 24px 28px 60px;
    max-width: 1200px;
    width: 100%;
}

/* ---------- Auth (login) ---------- */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(160deg, #0f1420 0%, #1b2436 55%, #14181f 100%);
}

.auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.auth-brand {
    text-align: center;
    margin-bottom: 26px;
}

.auth-brand .brand-icon { font-size: 30px; color: var(--color-primary); display:block; margin-bottom: 8px;}
.auth-brand h1 { font-size: 18px; margin: 0 0 2px; }
.auth-brand p { font-size: 12.5px; color: var(--color-text-muted); margin: 0; }

.auth-lang-switch {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 18px;
    font-size: 12.5px;
    font-weight: 600;
}
.auth-lang-switch a { color: var(--color-text-muted); padding: 3px 8px; border-radius: 6px; }
.auth-lang-switch a.is-active { background: var(--color-bg); color: var(--color-primary); }

/* ---------- Forms ---------- */
.form-group { margin-bottom: 16px; }
.form-label {
    display: block;
    font-size: 12.5px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text);
}
.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 13.5px;
    background: #fff;
    color: var(--color-text);
    font-family: inherit;
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.12);
}
textarea.form-control { resize: vertical; min-height: 70px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-hint { font-size: 11.5px; color: var(--color-text-muted); margin-top: 4px; }
.form-error { font-size: 11.5px; color: var(--color-danger); margin-top: 4px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-size: 13.5px;
    font-weight: 600;
    border: 1px solid transparent;
    background: var(--color-primary);
    color: #fff;
    transition: background .15s ease;
}
.btn:hover { background: var(--color-primary-dark); }
.btn-block { width: 100%; }
.btn-secondary { background: #fff; color: var(--color-text); border-color: var(--color-border); }
.btn-secondary:hover { background: var(--color-bg); }
.btn-danger { background: var(--color-danger); }
.btn-danger:hover { background: #b91c1c; }
.btn-sm { padding: 6px 12px; font-size: 12.5px; }
.btn-dark { background: var(--color-sidebar); }
.btn-dark:hover { background: #060708; }

/* ---------- Alerts ---------- */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
    margin-bottom: 16px;
    border: 1px solid transparent;
}
.alert-success { background: #ecfdf3; color: #067647; border-color: #abefc6; }
.alert-error { background: #fef3f2; color: #b42318; border-color: #fecdca; }

/* ---------- Page header ---------- */
.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}
.page-title { font-size: 22px; font-weight: 700; margin: 0; }
.page-subtitle { font-size: 13px; color: var(--color-text-muted); margin-top: 2px; }
.page-header-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- Tabs (scope) ---------- */
.tabs {
    display: inline-flex;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 4px;
    gap: 2px;
    margin-bottom: 20px;
}
.tab {
    padding: 7px 16px;
    border-radius: 8px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--color-text-muted);
}
.tab.is-active { background: var(--color-sidebar); color: #fff; }

/* ---------- KPI cards ---------- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 14px;
    margin-bottom: 20px;
}
.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    box-shadow: var(--shadow-card);
}
.kpi-label {
    font-size: 12px;
    color: var(--color-text-muted);
    font-weight: 600;
    margin-bottom: 8px;
}
.kpi-value { font-size: 22px; font-weight: 700; letter-spacing: -0.3px; }
.kpi-sub { font-size: 12px; margin-top: 6px; color: var(--color-text-muted); }
.kpi-card.emphasis { border-color: var(--color-primary); }
.kpi-card.emphasis .kpi-value { color: var(--color-primary); }

.text-positive { color: var(--color-success); }
.text-negative { color: var(--color-danger); }
.text-muted { color: var(--color-text-muted); }

/* ---------- Panels / charts ---------- */
.panel-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}
.panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-card);
}
.panel-title { font-size: 14.5px; font-weight: 700; margin: 0 0 14px; }
.legend-list { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
.legend-row { display: flex; align-items: center; gap: 8px; font-size: 12.5px; }
.legend-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.legend-name { flex: 1; color: var(--color-text-muted); }
.legend-value { font-weight: 600; }

/* ---------- Cards grid (assets list) ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 14px;
}
.item-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 16px 18px;
    box-shadow: var(--shadow-card);
}
.item-card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}
.item-name { font-weight: 700; font-size: 14.5px; }
.item-meta { font-size: 11.5px; color: var(--color-text-muted); margin-top: 2px; }
.item-actions { display: flex; gap: 6px; }
.icon-btn {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 13px;
}
.icon-btn:hover { background: var(--color-bg); color: var(--color-text); }
.icon-btn.danger:hover { color: var(--color-danger); border-color: #fecdca; }
.item-value { font-size: 19px; font-weight: 700; margin: 6px 0 4px; }
.item-footer {
    display: flex;
    justify-content: space-between;
    font-size: 11.5px;
    color: var(--color-text-muted);
    padding-top: 8px;
    border-top: 1px solid var(--color-border);
    margin-top: 8px;
}

.badge {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 100px;
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.badge-family { background: #eef2ff; color: #4338ca; }
.badge-personal { background: #f0fdf4; color: #15803d; }
.badge-manual { background: #f4f4f5; color: #52525b; }
.badge-superadmin { background: #fff7ed; color: #c2410c; }
.badge-user { background: #eff6ff; color: #1d4ed8; }
.badge-active { background: #ecfdf3; color: #067647; }
.badge-inactive { background: #fef3f2; color: #b42318; }

/* ---------- Table ---------- */
.table-wrapper {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    box-shadow: var(--shadow-card);
}
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 12px 16px; text-align: left; white-space: nowrap; }
thead th {
    background: #fafbfc;
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    border-bottom: 1px solid var(--color-border);
}
tbody tr { border-bottom: 1px solid var(--color-border); }
tbody tr:last-child { border-bottom: none; }

.empty-state {
    text-align: center;
    padding: 50px 20px;
    color: var(--color-text-muted);
}
.empty-state-icon { font-size: 34px; margin-bottom: 10px; opacity: .5; }

.form-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    max-width: 640px;
    box-shadow: var(--shadow-card);
}
.form-actions { display: flex; gap: 10px; margin-top: 6px; }

.link-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    color: var(--color-text-muted);
    margin-bottom: 14px;
    font-weight: 600;
}
.link-back:hover { color: var(--color-primary); }

/* ---------- Mobile: sidebar collapses to bottom bar ---------- */
@media (max-width: 880px) {
    .sidebar {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: 64px;
        flex-direction: row;
        align-items: center;
        border-top: 1px solid rgba(255,255,255,0.08);
    }
    .sidebar-brand, .sidebar-logout { display: none; }
    .sidebar-nav {
        flex-direction: row;
        width: 100%;
        justify-content: space-around;
        padding: 6px 4px;
    }
    .nav-item { flex-direction: column; gap: 3px; font-size: 10px; padding: 6px 4px; text-align:center; }
    .nav-icon { font-size: 17px; }
    .main-content { margin-left: 0; padding-bottom: 64px; }
    .content-area { padding: 16px 14px 90px; }
    .topbar { padding: 12px 16px; }
    .panel-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .kpi-grid { grid-template-columns: 1fr 1fr; }
    .kpi-value { font-size: 18px; }
}