:root {
    --primary: #12A36C;
    --primary-dark: #0C7A51;
    --primary-soft: #E6F6EF;
    --bg: #F6F9F8;
    --card-bg: #FFFFFF;
    --text: #10233B;
    --text-muted: #5B6672;
    --border: #E4E9ED;
    --success: #16A34A;
    --success-soft: #DCFCE7;
    --danger: #DC2626;
    --danger-soft: #FEE2E2;
    --warning: #D97706;
    --warning-soft: #FEF3C7;
    --neutral-soft: #F1F1F6;
    --sidebar-w: 240px;
    --radius: 16px;
    --radius-sm: 10px;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Noto Sans Thai", -apple-system, "Segoe UI", "Sarabun", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { text-decoration: none; color: inherit; }

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-w);
    background: #ffffff;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; bottom: 0; left: 0;
    padding: 20px 0;
}
.sidebar-brand {
    font-weight: 700;
    font-size: 18px;
    padding: 0 20px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 10px;
}
.sidebar-brand img { height: 28px; width: auto; }
.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-muted);
    font-weight: 500;
    border-left: 3px solid transparent;
}
.nav-link:hover { background: var(--primary-soft); }
.nav-link.active {
    color: var(--primary);
    background: var(--primary-soft);
    border-left-color: var(--primary);
    font-weight: 700;
}
.nav-icon { width: 20px; text-align: center; }
.sidebar-footer {
    margin-top: auto;
    padding: 16px 20px 0;
    border-top: 1px solid var(--border);
}
.user-chip { font-size: 14px; margin-bottom: 8px; }
.logout-link { color: var(--danger); font-size: 13px; font-weight: 600; }

/* Main */
.main-content { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
    background: transparent;
    padding: 22px 28px 0;
}
.breadcrumb { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.breadcrumb strong { color: var(--text); font-weight: 700; }
.breadcrumb a:hover { text-decoration: underline; color: var(--primary); }
.topbar-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.topbar h1 { margin: 0 0 4px; font-size: 24px; }
.topbar .subtitle { color: var(--text-muted); font-size: 14px; margin: 0; }
.preview-badge {
    background: var(--warning-soft); color: var(--warning);
    font-size: 12px; font-weight: 700; padding: 6px 14px; border-radius: 999px; white-space: nowrap;
}
.connected-badge { background: var(--success-soft); color: var(--success); }
.content-body { padding: 20px 28px 32px; }

/* Toolbar (account/date selectors) */
.toolbar { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0 22px; align-items: center; }
.toolbar select.form-control { width: auto; min-width: 180px; }
.custom-date-wrap { display: inline-flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.custom-date-wrap input[type="date"].form-control { width: auto; min-width: 150px; }
.custom-date-wrap .date-sep { color: var(--text-muted); }

/* Cards / grid */
.grid { display: grid; gap: 18px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 1200px) {
    .grid-5 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 1000px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .grid-4, .grid-2, .grid-5 { grid-template-columns: 1fr; }
    .sidebar { display: none; }
    .main-content { margin-left: 0; }
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px;
    box-shadow: 0 1px 2px rgba(30,27,46,.03);
}
.stat-card .stat-label { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }
.stat-card .stat-value { font-size: 28px; font-weight: 800; line-height: 1.1; }
.stat-card .stat-value .unit { font-size: 15px; font-weight: 600; color: var(--text-muted); margin-left: 4px; }
.stat-card .stat-cost { font-size: 13px; font-weight: 700; margin-top: 8px; }
.stat-card .stat-sub { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.cost-good { color: var(--success); }
.cost-warn { color: var(--warning); }
.cost-bad { color: var(--danger); }

.section-title { font-size: 16px; font-weight: 700; margin: 0 0 14px; display: flex; align-items: center; gap: 8px; }

/* Trend chart card */
.chart-card { margin-top: 20px; }
.chart-legend { display: flex; gap: 16px; font-size: 12px; color: var(--text-muted); align-items: center; }
.chart-legend .dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; margin-right: 5px; }
.dot-current { background: var(--primary); }
.dot-previous { background: #CFE7DC; }
.chart-footer { border-top: 1px solid var(--border); margin-top: 14px; padding-top: 14px; font-size: 13px; color: var(--text-muted); }

/* Recommendations panel */
.rec-count-badge { background: var(--primary-soft); color: var(--primary); font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; }
.rec-row { display: flex; align-items: flex-start; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.rec-row:last-of-type { border-bottom: none; }
.rec-icon { width: 34px; height: 34px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0; }
.rec-icon-increase { background: var(--success-soft); color: var(--success); }
.rec-icon-close { background: var(--danger-soft); color: var(--danger); }
.rec-icon-watch { background: var(--warning-soft); color: var(--warning); }
.rec-title { font-weight: 700; font-size: 14px; }
.rec-desc { font-size: 13px; color: var(--text-muted); margin-top: 2px; }
.rec-count { font-weight: 700; font-size: 14px; margin-left: auto; white-space: nowrap; }
.rec-count.increase { color: var(--success); }
.rec-count.close { color: var(--danger); }
.rec-count.watch { color: var(--warning); }
.rec-footnote { font-size: 12px; color: var(--text-muted); padding-top: 12px; }

/* Filter tabs */
.tab-row { display: flex; gap: 22px; margin: 16px 0; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.tab-item { padding: 8px 4px 12px; font-size: 14px; color: var(--text-muted); font-weight: 600; border-bottom: 2px solid transparent; cursor: pointer; }
.tab-item.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-pill { background: var(--primary-soft); color: var(--primary); border-radius: 999px; padding: 10px 16px 10px; }

/* Table */
table.data-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; }
table.data-table th, table.data-table td {
    padding: 14px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    font-size: 14px;
}
table.data-table th { color: var(--text-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .02em; }
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tr.row-clickable { cursor: pointer; }
table.data-table tr.row-clickable:hover { background: var(--primary-soft); }
.table-wrap { overflow-x: auto; border-radius: var(--radius); }
.ad-name-cell { display: flex; align-items: center; gap: 10px; }
.ad-icon { width: 32px; height: 32px; border-radius: 8px; background: var(--primary-soft); color: var(--primary); display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 14px; }
.ad-name-main { font-weight: 600; }
.ad-name-sub { font-size: 12px; color: var(--text-muted); }

/* Badges */
.badge { display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; white-space: nowrap; }
.badge-active { background: var(--success-soft); color: var(--success); }
.badge-paused { background: var(--danger-soft); color: var(--danger); }
.badge-muted { background: var(--neutral-soft); color: var(--text-muted); }
.badge-increase { background: var(--success-soft); color: var(--success); }
.badge-maintain { background: var(--neutral-soft); color: var(--text-muted); }
.badge-watch { background: var(--warning-soft); color: var(--warning); }
.badge-close { background: var(--danger-soft); color: var(--danger); }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: #fff;
}
.form-control:focus { outline: none; border-color: var(--primary); }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 160px; }

.btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 14px;
    border: none;
    cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: #fff; border: 1px solid var(--border); color: var(--text); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 18px; font-size: 14px; }
.alert-success { background: var(--success-soft); color: #15803D; }
.alert-danger { background: var(--danger-soft); color: #B91C1C; }
.alert-info { background: var(--primary-soft); color: var(--primary-dark); }

/* Login page */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg,#12A36C,#10233B); }
.login-card { background: #fff; border-radius: var(--radius); padding: 36px 32px; width: 100%; max-width: 380px; box-shadow: 0 20px 50px rgba(0,0,0,.2); }
.login-card h2 { margin-top: 0; text-align: center; }
.login-logo { text-align: center; margin-bottom: 10px; }
.login-logo img { height: 56px; width: auto; }

.text-muted { color: var(--text-muted); }
.mt-0 { margin-top: 0; }
.flex-between { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }