:root {
    --bg: #f5f7fb;
    --panel: #ffffff;
    --panel-2: #f8fafc;
    --text: #162033;
    --muted: #6b7280;
    --line: #d9e2ec;
    --primary: #0f766e;
    --primary-dark: #115e59;
    --danger: #b91c1c;
    --warning-bg: #fff7ed;
    --warning-text: #9a3412;
    --shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
    --print-logo-width: 140px;
    --print-logo-height: 72px;
    --print-font-xs: 11px;
    --print-font-sm: 12px;
    --print-font-md: 13px;
    --print-font-lg: 20px;
    --print-title-font: 24px;
    --print-box-padding: 12px;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #eef5f3 0%, var(--bg) 180px);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.login-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}
.login-box, .form-card, .table-card, .stats-card, .print-shell {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}
.login-box {
    width: min(420px, 100%);
    padding: 28px;
}
.login-brand {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 18px;
}
.lang-switch {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-bottom: 12px;
}
.lang-switch a {
    background: var(--panel-2);
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--line);
    font-size: 12px;
}
input, select, textarea, button {
    font: inherit;
}
label {
    display: block;
    font-size: 14px;
    margin-bottom: 6px;
    font-weight: 600;
}
input, select, textarea {
    width: 100%;
    border: 1px solid #cbd5e1;
    border-radius: 12px;
    padding: 11px 12px;
    background: #fff;
}
textarea { min-height: 96px; resize: vertical; }
button, .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 12px;
    border: 0;
    padding: 11px 16px;
    cursor: pointer;
    font-weight: 700;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-light { background: var(--panel-2); color: var(--text); border: 1px solid var(--line); }
.btn-danger { background: var(--danger); color: #fff; }
.w100 { width: 100%; }
.alert {
    padding: 12px 14px;
    border-radius: 12px;
    margin-bottom: 16px;
}
.alert-success { background: #ecfdf5; color: #166534; }
.alert-danger { background: #fef2f2; color: #991b1b; }
.alert-warning { background: var(--warning-bg); color: var(--warning-text); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.admin-shell {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}
.sidebar {
    background: #132238;
    color: #e5eef9;
    padding: 22px;
}
.sidebar .brand {
    font-size: 24px;
    font-weight: 800;
}
.sidebar .brand-block {
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,.14);
    margin-bottom: 18px;
}
.sidebar-menu {
    display: grid;
    gap: 8px;
}
.sidebar-menu a {
    padding: 11px 12px;
    border-radius: 12px;
    color: #dbe7f5;
}
.sidebar-menu a.active, .sidebar-menu a:hover {
    background: rgba(255,255,255,.09);
    color: #fff;
}
.admin-main {
    padding: 24px;
}
.admin-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}
.form-card, .table-card, .stats-card {
    padding: 20px;
}
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}
.form-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}
.span-2 { grid-column: 1 / -1; }
.checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
}
.checkbox-row input { width: auto; }
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    border-bottom: 1px solid var(--line);
    padding: 12px 10px;
    text-align: left;
    vertical-align: top;
}
th { background: #f8fafc; font-size: 14px; }
.table-wrap { overflow-x: auto; }
.inline-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}
.stat-number {
    font-size: 30px;
    font-weight: 800;
}
.invoice-items-head,
.invoice-item-row {
    display: grid;
    grid-template-columns: 70px 110px 1.8fr 90px 110px 90px 100px 90px 130px 60px;
    gap: 10px;
    align-items: end;
}
.invoice-items-head {
    padding: 12px 0 8px;
    font-size: 13px;
    color: var(--muted);
    font-weight: 700;
}
.invoice-item-row {
    padding: 10px 0;
    border-top: 1px solid var(--line);
}
.recap-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}
.recap-box {
    background: var(--panel-2);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 16px;
}
.print-shell {
    max-width: 1020px;
    margin: 24px auto;
    padding: 28px;
}
.print-header {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: flex-start;
    border-bottom: 2px solid var(--line);
    padding-bottom: 18px;
}
.print-title {
    text-align: center;
    padding: 18px 0;
}
.print-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.print-box {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 16px;
}
.print-recap {
    margin-left: auto;
    width: min(360px, 100%);
}
.hidden { display: none !important; }
@media (max-width: 1100px) {
    .admin-shell { grid-template-columns: 1fr; }
    .sidebar { padding-bottom: 12px; }
}
@media (max-width: 900px) {
    .form-grid, .form-grid-3, .stats-grid, .recap-grid, .print-grid { grid-template-columns: 1fr; }
    .invoice-items-head { display: none; }
    .invoice-item-row { grid-template-columns: 1fr; border: 1px solid var(--line); padding: 12px; border-radius: 12px; margin-bottom: 12px; }
}
@media print {
    body { background: #fff; }
    .no-print { display: none !important; }
    .print-shell {
        box-shadow: none;
        border: 0;
        margin: 0;
        max-width: none;
        width: 100%;
        padding: 0;
        border-radius: 0;
    }
    .table-card, .print-box {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}