:root {
    --bg: #f3f5f9;
    --bg-soft: #e3e8f0;
    --card: #ffffff;
    --card-muted: #f8fafc;
    --accent: #2563eb;
    --accent-strong: #1d4ed8;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: rgba(15, 23, 42, 0.12);
    --border-strong: rgba(15, 23, 42, 0.2);
    --danger: #dc2626;
    --success: #16a34a;
    font-family: 'Space Grotesk', sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: radial-gradient(circle at 20% 20%, #e0e7ff, var(--bg));
    color: var(--text);
    min-height: 100vh;
}

.app-shell {
    padding: 2rem;
    min-height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 1.5rem 2rem;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.app-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.app-header h1 {
    margin: 0;
    font-size: 1.8rem;
    letter-spacing: 0.05rem;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--card-muted);
}

.user-menu > div {
    text-align: right;
}

.layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
    align-items: start;
}

.layout.no-sidebar {
    grid-template-columns: 1fr;
}

.sidebar {
    background: var(--card);
    border-radius: 18px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
    z-index: 10;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
}

.nav-link,
.nav-group a {
    display: block;
    padding: 0.5rem 0;
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-group span {
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.1rem;
}

.nav-link:hover,
.nav-group a:hover {
    color: var(--accent);
}

.content {
    background: var(--card);
    border-radius: 24px;
    padding: 2rem;
    border: 1px solid var(--border);
    min-width: 0;
    box-shadow: 0 25px 60px rgba(15, 23, 42, 0.08);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

.table-wrapper {
    margin-top: 1rem;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: var(--card);
    overflow-x: auto;
    box-shadow: inset 0 1px 0 rgba(15, 23, 42, 0.04);
}

.line-table {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.line-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: var(--card);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.05);
}

.line-col {
    flex: 1;
    min-width: 180px;
}

.line-col strong {
    display: block;
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.line-col .muted {
    display: block;
    font-size: 0.8rem;
}

.line-col p {
    margin: 0.2rem 0 0;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.65rem;
    border-radius: 999px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent-strong);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-weight: 600;
}

.panel {
    margin-top: 2rem;
    background: var(--card);
    border-radius: 18px;
    border: 1px solid var(--border);
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.muted {
    color: var(--text-muted);
    font-size: 0.9rem;
}

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

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.3rem;
    border-radius: 999px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.btn.primary {
    background: linear-gradient(120deg, var(--accent), var(--accent-strong));
    color: #f8fafc;
    box-shadow: 0 12px 24px rgba(37, 99, 235, 0.25);
}

.btn.secondary {
    background: var(--card-muted);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn.danger {
    background: linear-gradient(120deg, #ef4444, #dc2626);
    color: #fff;
    box-shadow: 0 12px 20px rgba(220, 38, 38, 0.2);
}

.btn.ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.btn.ghost.danger {
    color: var(--danger);
    border-color: rgba(220, 38, 38, 0.4);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.card {
    background: var(--card);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
}

.messages {
    margin-bottom: 1rem;
}

.message {
    padding: 0.75rem 1rem;
    border-radius: 12px;
    margin-bottom: 0.5rem;
}

.message.success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.4);
    color: #166534;
}

.message.error {
    background: rgba(248, 113, 113, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.4);
    color: #991b1b;
}

form {
    display: grid;
    gap: 1rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.form-control {
    display: flex;
    flex-direction: column;
}

.form-control.compact label {
    font-size: 0.8rem;
}

.form-control label,
label {
    display: block;
    margin-bottom: 0.3rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

input, select, textarea {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
}

.formset-card {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1rem;
    background: var(--card);
}

.checkbox-inline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
}

.auth-card {
    max-width: 420px;
    margin: 0 auto;
    padding: 2rem;
    border-radius: 18px;
    background: var(--card);
    border: 1px solid var(--border);
    box-shadow: 0 30px 60px rgba(15, 23, 42, 0.1);
}

.auth-card h2 {
    margin-top: 0;
}

.auth-card .muted {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.stack {
    display: grid;
    gap: 1rem;
}

.error-text {
    color: var(--danger);
    font-size: 0.75rem;
}

.info-banner {
    border-radius: 16px;
    padding: 1rem 1.25rem;
    background: rgba(37, 99, 235, 0.08);
    border: 1px dashed rgba(37, 99, 235, 0.4);
    color: var(--text);
}

.entry-form {
    margin-bottom: 1.5rem;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--card-muted);
}

.form-grid.compact {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.entry-actions,
.line-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.inline-delete {
    margin: 0;
}

@media (max-width: 900px) {
    .layout {
        grid-template-columns: 1fr;
        position: relative;
    }

    .sidebar {
        position: fixed;
        top: 90px;
        left: 1.5rem;
        right: 1.5rem;
        flex-direction: column;
        gap: 1rem;
        box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
        transform: translateY(-30px) scale(0.98);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.25s ease, opacity 0.25s ease;
    }

    .layout.sidebar-open .sidebar {
        transform: translateY(0) scale(1);
        opacity: 1;
        pointer-events: auto;
    }

    .content {
        padding: 1.5rem;
    }
}

.nav-toggle {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
    content: '';
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 999px;
    position: relative;
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
    position: absolute;
    left: 0;
}

.nav-toggle-bar::before {
    top: -6px;
}

.nav-toggle-bar::after {
    top: 6px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.table thead th {
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-muted);
}

@media (max-width: 720px) {
    .table thead {
        display: none;
    }

    .table tbody {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .table tr {
        display: grid;
        gap: 0.5rem;
        border: 1px solid var(--border);
        border-radius: 16px;
        padding: 1rem;
        background: rgba(255, 255, 255, 0.02);
    }

    .table td {
        display: flex;
        justify-content: space-between;
        gap: 1rem;
        border: none;
        padding: 0.15rem 0;
    }

    .table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-muted);
    }
}

@media (max-width: 600px) {
    .app-shell {
        padding: 1.25rem;
    }

    .btn {
        width: 100%;
    }

    .user-menu {
        width: 100%;
        justify-content: space-between;
    }
}

@media (max-width: 520px) {
    .cards {
        grid-template-columns: 1fr;
    }
}