:root {
    --primary: #1a5f4a;
    --primary-dark: #124434;
    --bg: #f4f6f5;
    --card: #ffffff;
    --border: #dfe5e2;
    --text: #1f2a26;
    --muted: #6b7770;
    --danger: #b3261e;
    --danger-bg: #fdecea;
    --success: #1a5f4a;
    --success-bg: #e8f3ee;
    --warn: #8a6d00;
    --warn-bg: #fff8e1;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.topbar {
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    position: sticky;
    top: 0;
    z-index: 20;
}
.menu-toggle {
    background: none;
    border: none;
    color: #fff;
    font-size: 22px;
    cursor: pointer;
    display: block;
}
.brand { font-weight: 600; font-size: 17px; }

.layout { display: flex; min-height: calc(100vh - 48px); }

.sidebar {
    background: var(--primary-dark);
    width: 220px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 48px;
    bottom: 0;
    left: -240px;
    transition: left .2s ease;
    z-index: 15;
    overflow-y: auto;
}
.sidebar.open { left: 0; }
.sidebar a {
    color: #d7e6df;
    text-decoration: none;
    padding: 13px 18px;
    font-size: 14.5px;
    border-left: 3px solid transparent;
}
.sidebar a:hover { background: rgba(255,255,255,0.06); }
.sidebar a.active {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border-left-color: #fff;
    font-weight: 600;
}

.content {
    flex: 1;
    padding: 16px;
    width: 100%;
}

@media (min-width: 860px) {
    .menu-toggle { display: none; }
    .sidebar { left: 0; position: sticky; height: calc(100vh - 48px); }
    .content { padding: 24px 32px; }
}

h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 17px; margin: 0 0 12px; }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    margin-bottom: 16px;
}

.page-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 14px;
}

.btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 16px;
    border-radius: 7px;
    font-size: 14px;
    text-decoration: none;
    cursor: pointer;
}
.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.btn.danger { background: var(--danger); }
.btn.small { padding: 6px 10px; font-size: 13px; }

form label {
    display: block;
    font-size: 13px;
    color: var(--muted);
    margin: 10px 0 4px;
}
form input, form select, form textarea {
    width: 100%;
    padding: 9px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14.5px;
    background: #fff;
    color: var(--text);
}
form textarea { resize: vertical; }
.form-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.form-row > div { flex: 1; min-width: 150px; }

.grid-2 { display: grid; grid-template-columns: 1fr; gap: 12px; }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 12px; }
@media (min-width: 700px) {
    .grid-2 { grid-template-columns: 1fr 1fr; }
    .grid-3 { grid-template-columns: 1fr 1fr 1fr; }
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
    background: #fff;
}
th, td {
    padding: 9px 10px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
th { background: #eef2f0; color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }

.badge {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}
.badge.pending { background: var(--warn-bg); color: var(--warn); }
.badge.paid { background: var(--success-bg); color: var(--success); }
.badge.cleared { background: var(--success-bg); color: var(--success); }
.badge.bounced { background: var(--danger-bg); color: var(--danger); }
.badge.quotation { background: #eef0ff; color: #33399c; }

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
.flash.success { background: var(--success-bg); color: var(--success); }
.flash.error { background: var(--danger-bg); color: var(--danger); }

.stat-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 18px; }
@media (min-width: 700px) { .stat-cards { grid-template-columns: repeat(4, 1fr); } }
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.stat-card .num { font-size: 22px; font-weight: 700; color: var(--primary); }
.stat-card .lbl { font-size: 12.5px; color: var(--muted); margin-top: 3px; }

.text-right { text-align: right; }
.muted { color: var(--muted); font-size: 13px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

.line-item-row { border: 1px solid var(--border); border-radius: 8px; padding: 10px; margin-bottom: 10px; background: #fafcfb; }
.remove-line { background: none; border: none; color: var(--danger); cursor: pointer; font-size: 13px; }

.tabs { display: flex; gap: 6px; margin-bottom: 14px; flex-wrap: wrap; }
.tabs a {
    padding: 8px 14px;
    border-radius: 20px;
    background: #fff;
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
    font-size: 13.5px;
}
.tabs a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.pill-toggle {
    border: none;
    background: #fff;
    color: var(--text);
    padding: 10px 22px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
.pill-toggle.active {
    background: var(--primary-dark);
    color: #fff;
}