:root {
    --navy: #1f3864;
    --navy-dark: #142845;
    --blue-light: #eef3fa;
    --border: #d9e2ec;
    --text: #1b2733;
    --muted: #5b6b7c;
    --danger: #b3261e;
    --success: #1e6b3c;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    background: #f6f8fb;
}

.topbar { background: var(--navy); }
.topbar-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
}
.brand { color: #fff; font-weight: 700; text-decoration: none; font-size: 18px; }
.nav a {
    color: #cdd9ea;
    text-decoration: none;
    margin-left: 18px;
    font-size: 14px;
}
.nav a:hover { color: #fff; }

.container { max-width: 1100px; margin: 0 auto; padding: 24px 20px 60px; }

h1 { font-size: 22px; margin: 0 0 18px; }
h2 { font-size: 18px; margin: 24px 0 10px; }

.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #e6f4ea; color: var(--success); border: 1px solid #b9dfc4; }
.alert-error { background: #fbeceb; color: var(--danger); border: 1px solid #f0c4c1; }

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px;
    margin-bottom: 18px;
}

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 16px; }
.stat-card .label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.stat-card .value { font-size: 24px; font-weight: 700; margin-top: 6px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { background: var(--blue-light); color: var(--navy); font-weight: 600; font-size: 13px; }
tr:last-child td { border-bottom: none; }
table.totals td { border: none; padding: 4px 12px; }

.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 12px; flex-wrap: wrap; }

.btn {
    display: inline-block;
    background: var(--navy);
    color: #fff;
    padding: 9px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    border: none;
    cursor: pointer;
}
.btn:hover { background: var(--navy-dark); }
.btn-secondary { background: #fff; color: var(--navy); border: 1px solid var(--navy); }
.btn-secondary:hover { background: var(--blue-light); }
.btn-danger { background: #fff; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background: #fbeceb; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

form.inline { display: inline; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 5px; color: var(--muted); }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], select, textarea {
    width: 100%;
    padding: 9px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
}
textarea { min-height: 80px; }
.form-row { display: flex; gap: 14px; }
.form-row > .form-group { flex: 1; }

.badge { display: inline-block; padding: 3px 9px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge-unpaid, .badge-draft { background: #fdecea; color: var(--danger); }
.badge-partial, .badge-sent { background: #fff4e0; color: #9a6700; }
.badge-paid, .badge-accepted { background: #e6f4ea; color: var(--success); }
.badge-overdue, .badge-rejected, .badge-void, .badge-expired { background: #eee; color: var(--muted); }

.line-items-table input { width: 100%; }
.line-items-table td { vertical-align: top; }

.login-wrap {
    max-width: 380px;
    margin: 80px auto;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 30px;
}
.login-wrap h1 { text-align: center; }

.muted { color: var(--muted); font-size: 13px; }
a.link { color: var(--navy); }

.section-actions { display: flex; gap: 8px; }