:root {
    --teal: #0b5b66;
    --teal-dark: #08434c;
    --orange: #e59a3a;
    --navy: #1b6ea8;
    --bg: #f4f6f7;
    --card: #ffffff;
    --text: #223;
    --muted: #6b7680;
    --border: #e3e8ea;
    --danger: #d64545;
    --success: #2e9e5b;
    --warning: #e0a63a;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { text-decoration: none; color: inherit; }

/* ---------- Layout ---------- */
.app {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 230px;
    background: var(--teal-dark);
    color: #fff;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}
.sidebar .brand {
    padding: 20px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.12);
}
.sidebar .brand h1 {
    font-size: 18px;
    margin: 0;
    letter-spacing: 0.5px;
    font-weight: 800;
    color: #fff;
}
.sidebar .brand span {
    font-size: 11px;
    color: var(--orange);
    display: block;
    margin-top: 2px;
}
.sidebar nav {
    flex: 1;
    padding: 10px 0;
}
.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: #d9e6e8;
    font-size: 14px;
    border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(255,255,255,0.06); }
.sidebar nav a.active {
    background: rgba(255,255,255,0.08);
    border-left-color: var(--orange);
    color: #fff;
    font-weight: 600;
}
.sidebar .user-box {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,0.12);
    font-size: 13px;
}
.sidebar .user-box .logout {
    display: inline-block;
    margin-top: 8px;
    color: var(--orange);
    font-size: 12px;
}

.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.topbar {
    background: #fff;
    padding: 14px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.topbar h2 { margin: 0; font-size: 20px; }
.content { padding: 24px; }

/* ---------- Cards / stats ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--card);
    border-radius: 10px;
    padding: 18px 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    border-top: 4px solid var(--teal);
}
.stat-card.orange { border-top-color: var(--orange); }
.stat-card.navy { border-top-color: var(--navy); }
.stat-card.danger { border-top-color: var(--danger); }
.stat-card .label { color: var(--muted); font-size: 13px; }
.stat-card .value { font-size: 26px; font-weight: 700; margin-top: 6px; }

.card {
    background: var(--card);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    margin-bottom: 20px;
}
.card h3 { margin-top: 0; }

/* ---------- Tables ---------- */
table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
table.data-table th {
    background: var(--teal);
    color: #fff;
    text-align: left;
    padding: 10px 12px;
}
table.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}
table.data-table tr:hover td { background: #f9fbfb; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}
.badge.paid { background: #e3f6ea; color: var(--success); }
.badge.unpaid { background: #fdeaea; color: var(--danger); }
.badge.partial { background: #fdf3e2; color: var(--warning); }

/* ---------- Forms ---------- */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px 20px;
}
.form-group { display: flex; flex-direction: column; margin-bottom: 4px; }
.form-group.full { grid-column: 1 / -1; }
label { font-size: 13px; margin-bottom: 5px; color: var(--muted); font-weight: 600; }
input, select, textarea {
    padding: 9px 11px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--teal); }

.btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 6px;
    border: none;
    background: var(--teal);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
.btn:hover { background: var(--teal-dark); }
.btn.orange { background: var(--orange); }
.btn.orange:hover { background: #c97f21; }
.btn.danger { background: var(--danger); }
.btn.small { padding: 6px 12px; font-size: 12px; }
.btn.outline { background: transparent; border: 1px solid var(--teal); color: var(--teal); }

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
}
.alert.success { background: #e3f6ea; color: var(--success); }
.alert.error { background: #fdeaea; color: var(--danger); }

.actions a, .actions button { margin-right: 6px; }

/* ---------- Login page ---------- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--teal-dark), var(--teal));
}
.login-box {
    background: #fff;
    width: 360px;
    padding: 36px 32px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.25);
    text-align: center;
}
.login-box h1 { color: var(--teal-dark); margin-bottom: 2px; font-size: 22px; }
.login-box .sub { color: var(--orange); font-size: 12px; margin-bottom: 24px; }
.login-box input { width: 100%; margin-bottom: 12px; }
.login-box .btn { width: 100%; margin-top: 6px; }

/* ---------- Invoice items table (new invoice form) ---------- */
#itemsTable input { width: 100%; }
#itemsTable td { padding: 6px; }
#itemsTable th { padding: 8px; }

@media print {
    .no-print { display: none !important; }
}