:root {
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-border: #e2e4e9;
    --color-text: #1f2430;
    --color-text-muted: #6b7280;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-danger: #dc2626;
    --color-success: #16a34a;
    --radius: 8px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 15px;
    line-height: 1.5;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}
.topbar-inner {
    max-width: 1000px;
    margin: 0 auto;
    padding: 14px 20px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 24px;
}
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--color-text); font-size: 18px; justify-self: start; }
.brand-tagline { display: block; font-weight: 400; font-size: 11px; color: var(--color-text-muted); }
.topbar nav { display: flex; gap: 18px; justify-self: center; }
.topbar .logout { justify-self: end; }

@media (max-width: 560px) {
    .topbar-inner {
        grid-template-columns: 1fr auto;
        grid-template-areas: "brand logout" "nav nav";
        row-gap: 10px;
    }
    .brand { grid-area: brand; }
    .topbar .logout { grid-area: logout; }
    .topbar nav { grid-area: nav; flex-wrap: wrap; justify-content: center; }
}
.topbar nav a { display: inline-flex; align-items: center; gap: 6px; color: var(--color-text-muted); font-weight: 500; }
.topbar nav a.active, .topbar nav a:hover { color: var(--color-primary); text-decoration: none; }
.topbar .logout { display: inline-flex; align-items: center; gap: 6px; color: var(--color-text-muted); font-size: 14px; }

.icon { display: inline-block; vertical-align: middle; flex-shrink: 0; }

.content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 28px 20px 60px;
}

h1 { display: flex; align-items: center; gap: 10px; font-size: 24px; margin: 0 0 20px; }
h2 { font-size: 18px; margin: 0 0 14px; }

.page-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--color-border); font-size: 14px; }
th { color: var(--color-text-muted); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.02em; }
tr:last-child td { border-bottom: none; }
td.num, th.num { text-align: right; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
}
.btn:hover { text-decoration: none; background: #f0f1f3; }
.btn-primary { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-danger { color: var(--color-danger); }
.btn-small { padding: 4px 10px; font-size: 13px; gap: 4px; }

.danger-zone summary.btn { list-style: none; }
.danger-zone summary.btn::-webkit-details-marker { display: none; }
.danger-zone summary.btn::marker { content: ""; }

.form-row { margin-bottom: 16px; }
.form-row label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 14px; }
.form-row input[type=text],
.form-row input[type=email],
.form-row input[type=number],
.form-row input[type=date],
.form-row input[type=password],
.form-row input[type=file],
.form-row select,
.form-row textarea {
    width: 100%;
    padding: 9px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    background: #fff;
    color: var(--color-text);
}
.form-row textarea { min-height: 80px; resize: vertical; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

.badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-offen { background: #fef3c7; color: #92400e; }
.badge-bezahlt { background: #dcfce7; color: #166534; }
.badge-storniert { background: #e5e7eb; color: #4b5563; }

.items-table input { width: 100%; border: 1px solid var(--color-border); border-radius: 6px; padding: 6px 8px; font-size: 14px; }
.items-table td { vertical-align: top; }
.items-table .price { width: 140px; }
.items-table .line-total { white-space: nowrap; font-variant-numeric: tabular-nums; }

.totals { margin-top: 16px; width: 260px; margin-left: auto; }
.totals div { display: flex; justify-content: space-between; padding: 4px 0; }
.totals .grand { font-weight: 700; font-size: 17px; border-top: 1px solid var(--color-border); margin-top: 6px; padding-top: 10px; }

.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 20px; font-size: 14px; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-success { background: #dcfce7; color: #166534; }
.alert-info { background: #dbeafe; color: #1e3a8a; }

.login-wrap {
    max-width: 360px;
    margin: 90px auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
}
.login-wrap h1 { font-size: 20px; text-align: center; }

.empty-state { color: var(--color-text-muted); text-align: center; padding: 40px 0; }
.text-muted { color: var(--color-text-muted); }
code { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: 4px; padding: 1px 5px; font-size: 0.9em; }
.actions-cell { white-space: nowrap; text-align: right; }
.current-logo { max-height: 60px; margin-bottom: 10px; display: block; }