:root {
    color-scheme: light;
    --bg: #f7f8fb;
    --surface: #ffffff;
    --surface-strong: #f2f4f8;
    --border: #e1e6ef;
    --text: #172337;
    --muted: #657488;
    --primary: #3b82f6;
    --primary-strong: #2563eb;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --shadow: 0 24px 80px rgba(15, 23, 42, 0.08);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    min-height: 100%;
    background: radial-gradient(circle at top left, rgba(59,130,246,.08), transparent 34%), var(--bg);
    color: var(--text);
}

body {
    line-height: 1.5;
}

button, input, a {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

.app-shell {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
    border-right: 1px solid var(--border);
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-mark {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.08em;
}

.search-box input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);
    color: var(--text);
    transition: border-color .2s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
}

.nav-list {
    display: grid;
    gap: 8px;
}

.nav-item {
    display: block;
    padding: 12px 16px;
    border-radius: 14px;
    color: var(--muted);
    transition: background .2s ease, color .2s ease;
}

.nav-item:hover,
.nav-item.active {
    background: var(--surface-strong);
    color: var(--text);
}

.sidebar-footer {
    margin-top: auto;
}

.sidebar-user {
    padding: 16px;
    border-radius: 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.main-content {
    padding: 32px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: start;
    gap: 24px;
    margin-bottom: 28px;
}

.topbar h1 {
    font-size: clamp(1.75rem, 2vw, 2.4rem);
    margin: 0;
}

.topbar-subtitle {
    margin: 8px 0 0;
    color: var(--muted);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 18px;
    border-radius: 12px;
    border: 1px solid transparent;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--primary);
    color: white;
}

.button-secondary {
    background: var(--surface);
    border-color: var(--border);
    color: var(--text);
}

.overview-cards {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 24px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.card strong {
    display: block;
    font-size: 2rem;
    margin-bottom: 10px;
}

.card p {
    margin: 0 0 16px;
    color: var(--muted);
}

.card a {
    color: var(--primary);
    font-weight: 600;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.panel-header,
.panel-body {
    padding: 24px;
}

.panel-header {
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.panel-header h2 {
    margin: 0;
    font-size: 1.2rem;
}

.panel-tabs {
    align-items: center;
}

.tab {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 16px;
    border-radius: 999px;
    background: var(--surface-strong);
    color: var(--muted);
    margin-right: 10px;
    cursor: pointer;
}

.tab.active {
    background: var(--primary);
    color: white;
}

.panel-body.panel-list,
.panel-body.panel-table {
    display: grid;
    gap: 12px;
}

.panel-item,
.list-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 18px 20px;
    border-radius: 18px;
    background: var(--surface-strong);
}

.panel-item strong,
.list-row strong {
    font-size: 1rem;
}

.panel-item p,
.list-row p {
    margin: 4px 0 0;
    color: var(--muted);
}

.panel-meta,
.list-meta {
    text-align: right;
    display: grid;
    gap: 6px;
}

.status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 0.82rem;
    text-transform: capitalize;
    width: fit-content;
}

.status-abgegeben { background: rgba(245, 158, 11, .12); color: var(--warning); }
.status-entwurf { background: rgba(59, 130, 246, .12); color: var(--primary); }
.status-angenommen { background: rgba(34, 197, 94, .12); color: var(--success); }
.status-abgelehnt { background: rgba(239, 68, 68, .12); color: var(--danger); }

.list-row-split {
    align-items: flex-start;
}

.list-row-split strong span {
    color: var(--muted);
    font-weight: 400;
}

.text-muted {
    color: var(--muted);
}

@media (max-width: 1080px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        flex-direction: row;
        flex-wrap: wrap;
        position: sticky;
        top: 0;
    }

    .main-content {
        padding: 20px;
    }

    .overview-cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .sidebar {
        padding: 16px;
    }

    .search-box,
    .nav-list,
    .sidebar-user {
        width: 100%;
    }

    .overview-cards {
        grid-template-columns: 1fr;
    }

    .topbar {
        flex-direction: column;
        align-items: stretch;
    }
}