:root {
    --ink: #11271e;
    --forest: #0d3b2e;
    --forest-deep: #082b21;
    --leaf: #1a9e6e;
    --leaf-soft: #e3f5ed;
    --gold: #d9a521;
    --paper: #f4f7f5;
    --line: #dfe8e3;
    --muted: #6b7f76;
    --red: #c8483c;
    --blue: #2563ab;
    --amber: #b97a13;
}

* { font-family: 'Be Vietnam Pro', system-ui, sans-serif; }

body {
    background: var(--paper);
    color: var(--ink);
    font-size: 14.5px;
}

.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 256px;
    background: linear-gradient(180deg, var(--forest) 0%, var(--forest-deep) 100%);
    color: #cfe5da;
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 1040;
    transition: transform .25s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 18px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.brand-icon {
    width: 42px; height: 42px;
    border-radius: 12px;
    background: var(--gold);
    color: var(--forest-deep);
    display: flex; align-items: center; justify-content: center;
    font-size: 19px;
    flex-shrink: 0;
}

.brand-icon-lg { width: 56px; height: 56px; font-size: 26px; margin: 0 auto 14px; }

.brand-text strong {
    display: block;
    color: #fff;
    font-size: 15px;
    letter-spacing: 2px;
    font-weight: 800;
}
.brand-text span { font-size: 12px; color: #8fb3a5; }

.sidebar-nav { padding: 14px 10px; flex: 1; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 10px;
    color: #b9d4c8;
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 4px;
    border-left: 3px solid transparent;
    transition: background .15s, color .15s;
}
.nav-item i { width: 20px; text-align: center; font-size: 15px; }
.nav-item:hover { background: rgba(255,255,255,.07); color: #fff; }
.nav-item.active {
    background: rgba(217,165,33,.14);
    color: #fff;
    border-left-color: var(--gold);
}
.nav-item.active i { color: var(--gold); }

.sidebar-footer {
    padding: 14px 18px;
    font-size: 12px;
    color: #7da294;
    border-top: 1px solid rgba(255,255,255,.08);
}

.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(8,43,33,.5);
    z-index: 1035;
}

.main-wrap {
    flex: 1;
    margin-left: 256px;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 12px 22px;
    display: flex;
    align-items: center;
    gap: 14px;
    position: sticky;
    top: 0;
    z-index: 1020;
}

.btn-toggle-menu {
    display: none;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 8px;
    width: 38px; height: 38px;
    color: var(--forest);
}

.topbar-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--forest);
    flex: 1;
}

.user-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--leaf-soft);
    color: var(--leaf);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.user-name { margin-left: 10px; font-weight: 600; color: var(--ink); }

.content { padding: 22px; flex: 1; }

.page-footer {
    padding: 14px 22px;
    font-size: 12.5px;
    color: var(--muted);
    border-top: 1px solid var(--line);
}

.card {
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: 0 1px 3px rgba(13,59,46,.05);
}
.card-header {
    background: #fff;
    border-bottom: 1px solid var(--line);
    border-radius: 14px 14px 0 0 !important;
    font-weight: 700;
    color: var(--forest);
    padding: 14px 18px;
}
.filter-card { margin-bottom: 18px; }
.form-label { font-size: 12.5px; font-weight: 600; color: var(--muted); margin-bottom: 4px; }
.form-select, .form-control { border-color: var(--line); border-radius: 9px; }
.form-select:focus, .form-control:focus {
    border-color: var(--leaf);
    box-shadow: 0 0 0 .2rem rgba(26,158,110,.12);
}

.btn-primary {
    background: var(--forest);
    border-color: var(--forest);
    border-radius: 9px;
    font-weight: 600;
}
.btn-primary:hover, .btn-primary:focus { background: var(--forest-deep); border-color: var(--forest-deep); }
.btn-success {
    background: var(--leaf);
    border-color: var(--leaf);
    border-radius: 9px;
    font-weight: 600;
}
.btn-outline-success { --bs-btn-color: var(--leaf); --bs-btn-border-color: var(--leaf); --bs-btn-hover-bg: var(--leaf); --bs-btn-hover-border-color: var(--leaf); --bs-btn-active-bg: var(--leaf); --bs-btn-active-border-color: var(--leaf); }

.stat-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px 20px;
    height: 100%;
    position: relative;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
}
.stat-green::before { background: var(--leaf); }
.stat-blue::before  { background: var(--blue); }
.stat-amber::before { background: var(--gold); }
.stat-red::before   { background: var(--red); }

.stat-label { font-size: 12.5px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
.stat-value {
    font-size: clamp(20px, 2.4vw, 28px);
    font-weight: 800;
    color: var(--forest);
    margin: 4px 0 2px;
    font-variant-numeric: tabular-nums;
}
.stat-green .stat-value { color: var(--leaf); }
.stat-red .stat-value { color: var(--red); }
.stat-sub { font-size: 12px; color: var(--muted); }

.table thead th {
    background: var(--leaf-soft);
    color: var(--forest);
    font-size: 12.5px;
    text-transform: uppercase;
    letter-spacing: .4px;
    border-bottom: none;
    white-space: nowrap;
}
.table td { font-variant-numeric: tabular-nums; }
.table tfoot td { font-weight: 800; background: #fbf6e8; color: var(--forest); }

.badge-tt { font-size: 12px; font-weight: 600; padding: 5px 10px; border-radius: 20px; }
.tt-da_phat_hanh { background: #e7effa; color: var(--blue); }
.tt-da_thanh_toan { background: var(--leaf-soft); color: var(--leaf); }
.tt-bi_huy { background: #faeae8; color: var(--red); }

.chart-box { position: relative; height: 320px; }

.thue-preview {
    background: #fbf6e8;
    border: 1px dashed var(--gold);
    border-radius: 10px;
    padding: 12px 16px;
    color: var(--forest);
}
.thue-preview strong { color: var(--amber); font-size: 18px; }

.login-page {
    min-height: 100vh;
    background:
        radial-gradient(1100px 500px at 85% -10%, rgba(26,158,110,.25), transparent 60%),
        radial-gradient(800px 500px at -10% 110%, rgba(217,165,33,.18), transparent 55%),
        linear-gradient(160deg, var(--forest) 0%, var(--forest-deep) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-wrap { width: 100%; max-width: 420px; }
.login-card {
    background: #fff;
    border-radius: 18px;
    padding: 36px 32px;
    box-shadow: 0 24px 60px rgba(0,0,0,.3);
}
.login-head { text-align: center; margin-bottom: 26px; }
.login-head h1 { font-size: 22px; font-weight: 800; color: var(--forest); margin: 0 0 4px; }
.login-head p { color: var(--muted); font-size: 13.5px; margin: 0; }
.login-note { text-align: center; color: rgba(255,255,255,.55); font-size: 12px; margin-top: 16px; }

.toast-container { z-index: 2000; }

@media (max-width: 991.98px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.show { transform: translateX(0); }
    .sidebar-backdrop.show { display: block; }
    .main-wrap { margin-left: 0; }
    .btn-toggle-menu { display: inline-flex; align-items: center; justify-content: center; }
    .content { padding: 14px; }
    .topbar { padding: 10px 14px; }
    .topbar-title { font-size: 16px; }
    .chart-box { height: 240px; }
}