:root {
    --bg: #f6f8fc;
    --panel: #ffffff;
    --panel-soft: #f9fbff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #dbe3ef;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --success: #059669;
    --danger: #dc2626;
    --shadow: 0 16px 36px rgba(15, 23, 42, 0.06);
}

body {
    font-family: "Inter", sans-serif;
    background: linear-gradient(180deg, #f8fbff 0%, #f4f7fc 100%);
    color: var(--text-main);
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

h1, h2, h3, .logo {
    font-family: "Outfit", sans-serif;
    letter-spacing: 0.01em;
}

.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.logo span {
    color: var(--primary);
}

.logo-image {
    height: 36px;
    width: auto;
    object-fit: contain;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
}

.auth-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.auth-box {
    background: var(--panel);
    padding: 2.5rem;
    border-radius: 1rem;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.auth-brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin-bottom: 1rem;
}

.auth-brand-text {
    font-family: "Outfit", sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
}

.auth-brand-text span {
    color: var(--primary);
}

.input-group {
    margin-bottom: 1rem;
}

input, select, textarea {
    width: 100%;
    padding: 0.85rem 0.95rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 0.65rem;
    color: var(--text-main);
    box-sizing: border-box;
    font-size: 0.95rem;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #93c5fd;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn-primary {
    width: 100%;
    padding: 0.78rem 1rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 0.65rem;
    cursor: pointer;
    font-weight: 600;
    transition: 0.2s ease;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    padding: 0.62rem 1rem;
    background: #fff;
    border: 1px solid var(--border);
    color: var(--text-muted);
    border-radius: 0.65rem;
    cursor: pointer;
    text-decoration: none;
    transition: 0.2s ease;
}

.btn-secondary:hover {
    border-color: #b9c8dd;
    color: var(--text-main);
}

.btn-secondary:disabled {
    background: #f1f5f9;
    color: #94a3b8;
    border-color: #e2e8f0;
    cursor: not-allowed;
    opacity: 1;
}

.btn-rebalance {
    background: #f59e0b;
    color: #ffffff;
    border-color: #f59e0b;
    font-weight: 700;
}

.btn-rebalance:hover {
    background: #d97706;
    border-color: #d97706;
    color: #ffffff;
}

.btn-rebalance:disabled {
    background: #fef3c7;
    color: #9ca3af;
    border-color: #fde68a;
}

.dashboard-container {
    display: flex;
    flex: 1;
}

.sidebar {
    width: 360px;
    background: var(--panel);
    border-right: 1px solid var(--border);
    padding: 2rem;
    overflow-y: auto;
}

.main-content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.form-group {
    margin-bottom: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

.checkbox-group {
    margin-bottom: 0.85rem;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.55rem;
    line-height: 1.4;
    white-space: normal;
    word-break: break-word;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-top: 0.1rem;
    flex: 0 0 auto;
}

.large-select {
    height: 50px;
    font-size: 1rem;
}

.range-group {
    margin-bottom: 1rem;
}

.range-group label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.weight-total {
    background: var(--panel-soft);
    border: 1px solid var(--border);
    padding: 0.7rem 0.8rem;
    border-radius: 0.6rem;
    margin: 0.5rem 0 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

#weight_total {
    color: var(--success);
    font-weight: 700;
}

#weight_total.invalid {
    color: var(--danger);
}

.divider {
    height: 1px;
    background: var(--border);
    margin: 1.75rem 0;
}

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

.metrics-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.metric-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 0.8rem;
    box-shadow: var(--shadow);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.metric-label {
    color: var(--text-muted);
    font-size: 0.84rem;
}

.metric-value {
    font-size: 1.35rem;
    font-weight: 700;
}

.charts-row {
    margin-bottom: 1.25rem;
}

.chart-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 0.8rem;
    box-shadow: var(--shadow);
    padding: 1rem;
}

.chart-card h3 {
    margin-top: 0;
    margin-bottom: 0.9rem;
}

.chart-wrap {
    width: min(440px, 100%);
    margin: 0 auto;
    aspect-ratio: 1 / 1;
}

#allocationChart {
    width: 100% !important;
    height: 100% !important;
}

.table-card {
    background: var(--panel);
    border-radius: 0.8rem;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

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

th, td {
    padding: 0.9rem 1rem;
    text-align: left;
    border-bottom: 1px solid #ecf1f7;
}

th {
    background: #f7faff;
    font-weight: 600;
    color: #475569;
}

.tabs {
    display: flex;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    padding: 0.75rem;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.actions .btn-primary,
.actions .btn-secondary {
    width: auto;
    flex: 1 1 0;
    min-width: 0;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
    border: 2px dashed var(--border);
    border-radius: 1rem;
    background: #fbfdff;
}

.alert {
    padding: 0.85rem 1rem;
    margin-bottom: 1rem;
    border-radius: 0.6rem;
    border: 1px solid transparent;
}

.alert-danger {
    background: #fef2f2;
    color: #991b1b;
    border-color: #fecaca;
}

.alert-success {
    background: #ecfdf5;
    color: #065f46;
    border-color: #a7f3d0;
}

.btn-export {
    display: inline-block;
    padding: 0.58rem 1rem;
    background: var(--success);
    color: #fff;
    text-decoration: none;
    border-radius: 0.65rem;
    font-size: 0.9rem;
}

@media (max-width: 1040px) {
    .dashboard-container {
        flex-direction: column;
    }

    .sidebar {
        width: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .metrics-row {
        grid-template-columns: 1fr;
    }

    .table-card {
        overflow-x: auto;
    }

    .actions {
        flex-direction: column;
    }
}