*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #003366;
    --primary-light: #004d99;
    --bg: #f4f6f9;
    --surface: #ffffff;
    --text: #1a1a2e;
    --muted: #666;
    --border: #dde3ea;
    --success: #2e7d32;
    --success-bg: #e8f5e9;
    --warning: #e65100;
    --warning-bg: #fff3e0;
    --error: #c62828;
    --error-bg: #ffebee;
    --radius: 8px;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: var(--primary);
    color: #fff;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

header h1 {
    font-size: 1.35rem;
    font-weight: 600;
}

header p {
    font-size: 0.85rem;
    opacity: 0.85;
    margin-top: 0.15rem;
}

nav.tabs {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 0;
    padding: 0 2rem;
    overflow-x: auto;
}

nav.tabs button {
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 0.9rem 1.1rem;
    font-size: 0.9rem;
    color: var(--muted);
    cursor: pointer;
    white-space: nowrap;
    transition: color 0.15s, border-color 0.15s;
}

nav.tabs button:hover {
    color: var(--primary);
}

nav.tabs button.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

main {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem 3rem;
    width: 100%;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

.card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
    padding: 1.5rem;
    margin-bottom: 1.25rem;
}

.card h2 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--muted);
    line-height: 1.55;
    font-size: 0.92rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.stat-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
    border-left: 4px solid var(--primary);
}

.stat-card .value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-card .label {
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 0.2rem;
}

.form-grid {
    display: grid;
    gap: 1rem;
    max-width: 560px;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.35rem;
}

input[type="text"],
input[type="url"],
input[type="password"],
input[type="file"] {
    width: 100%;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
}

input:focus {
    outline: 2px solid rgba(0, 51, 102, 0.25);
    border-color: var(--primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}

.btn:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-light);
}

.btn-secondary {
    background: #e8edf2;
    color: var(--text);
}

.btn-secondary:hover:not(:disabled) {
    background: #dde3ea;
}

.btn-danger {
    background: var(--error-bg);
    color: var(--error);
}

.btn-danger:hover:not(:disabled) {
    background: #ffcdd2;
}

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 1rem;
}

.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    font-size: 0.88rem;
    margin-top: 1rem;
    display: none;
}

.alert.visible {
    display: block;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border-left: 4px solid var(--success);
}

.alert-error {
    background: var(--error-bg);
    color: var(--error);
    border-left: 4px solid var(--error);
}

.alert-info {
    background: #e3f2fd;
    color: #1565c0;
    border-left: 4px solid #1565c0;
}

.table-wrap {
    overflow-x: auto;
    margin-top: 1rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

th, td {
    padding: 0.6rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: #f8fafc;
    font-weight: 600;
    color: var(--primary);
    white-space: nowrap;
}

tr:hover td {
    background: #fafbfc;
}

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-pending { background: var(--warning-bg); color: var(--warning); }
.badge-fetched { background: var(--success-bg); color: var(--success); }
.badge-error { background: var(--error-bg); color: var(--error); }
.badge-export_manual { background: #e8f1ff; color: #1d4f91; }
.badge-gutschrift { background: #fff3e0; color: #e65100; }

tr.row-export-hint td {
    background: #f7fbff;
}

.checkbox-cell {
    text-align: center;
}

.empty-state {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--muted);
}

.empty-state p {
    margin-top: 0.5rem;
}

footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.8rem;
    color: #999;
}

.progress-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 0.75rem;
    display: none;
}

.progress-bar.visible {
    display: block;
}

.progress-bar .fill {
    height: 100%;
    background: var(--primary);
    width: 0%;
    transition: width 0.3s;
}

@media (max-width: 640px) {
    header, main, nav.tabs {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

.btn-header-logout {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.35);
    padding: 0.45rem 0.9rem;
    font-size: 0.85rem;
    white-space: nowrap;
}

.btn-header-logout:hover {
    background: rgba(255, 255, 255, 0.22);
}

.header-role-badge {
    display: inline-block;
    margin-left: 0.35rem;
    padding: 0.1rem 0.45rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.2);
    vertical-align: middle;
}

body.login-page {
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 2rem;
}

.login-card h1 {
    font-size: 1.5rem;
    margin-bottom: 0.35rem;
}

.login-subtitle {
    color: var(--muted);
    margin-bottom: 1.25rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.login-form label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.login-form input {
    width: 100%;
}

.login-form .btn {
    margin-top: 0.5rem;
    width: 100%;
}

.btn-lg {
    padding: 0.75rem 1.35rem;
    font-size: 1rem;
}

.master-workflow-hint {
    margin-top: 0.75rem;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.45;
}

.master-advanced {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.75rem 1rem;
    background: #fafbfc;
}

.master-advanced summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--primary);
    user-select: none;
}