.calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.input-section {
    background: white;
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.input-section h2 {
    font-size: 24px;
    margin-bottom: 25px;
    color: #1e293b;
}

.input-group {
    margin-bottom: 25px;
}

.slider-label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 4px;
    font-weight: 600;
    font-size: 14px;
}

.slider-label .value {
    font-weight: 500;
    color: #4b5563;
    font-size: 13px;
}

.input-section input[type="range"] {
    width: 100%;
    margin: 0;
    -webkit-appearance: none;
    background: transparent;
}

.input-section input[type="range"]::-webkit-slider-runnable-track {
    height: 6px;
    background: #e5e7eb;
    border-radius: 999px;
}

.input-section input[type="range"]::-moz-range-track {
    height: 6px;
    background: #e5e7eb;
    border-radius: 999px;
}

.input-section input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 999px;
    background: #1d4ed8;
    border: 2px solid #fff;
    box-shadow: 0 0 0 1px rgba(37,99,235,.5), 0 6px 12px rgba(15,23,42,.15);
    margin-top: -6px;
}

.input-section input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 999px;
    background: #1d4ed8;
    border: 2px solid #fff;
    box-shadow: 0 0 0 1px rgba(37,99,235,.5), 0 6px 12px rgba(15,23,42,.15);
}

.input-group label {
    display: block;
    font-weight: 600;
    color: #334155;
    margin-bottom: 8px;
    font-size: 15px;
}

input[type="number"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.2s;
}

input[type="number"]:focus {
    outline: none;
    border-color: #3b82f6;
}

input[readonly] {
    background: #f1f5f9;
    cursor: default;
}
/* Hide number spinners on readonly inputs so they don't look like dropdowns */
input[type="number"][readonly] {
    -moz-appearance: textfield;
}
input[type="number"][readonly]::-webkit-outer-spin-button,
input[type="number"][readonly]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.help-text {
    display: block;
    font-size: 13px;
    color: #64748b;
    margin-top: 6px;
}

.allocation-sum {
    font-size: 13px;
    color: #64748b;
}

.calculate-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.calculate-btn:active {
    transform: translateY(0);
}

.results-section {
    background: white;
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.results-section h2 {
    font-size: 28px;
    margin-bottom: 25px;
    color: #1e293b;
    text-align: center;
}

.opportunity-cost-banner {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    color: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 30px;
    box-shadow: 0 8px 20px rgba(220, 38, 38, 0.3);
}

.cost-label { font-size: 18px; font-weight: 600; margin-bottom: 10px; opacity: 0.95; }
.cost-amount { font-size: 48px; font-weight: 800; margin-bottom: 10px; text-shadow: 0 2px 4px rgba(0,0,0,0.2); }
.cost-explanation { font-size: 15px; opacity: 0.9; }

.comparison-table { margin-bottom: 40px; }

.comparison-header,
.comparison-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 15px;
    padding: 15px;
    align-items: center;
}

.comparison-header {
    background: #f1f5f9;
    border-radius: 8px;
    font-weight: 700;
    font-size: 14px;
    color: #475569;
    text-align: center;
}

.comparison-header .col-label { text-align: left; }
.fee-label { font-size: 12px; font-weight: 500; opacity: 0.8; }

.comparison-row {
    border-bottom: 1px solid #e2e8f0;
    font-size: 15px;
}

.comparison-row:last-child { border-bottom: none; }

.comparison-row.highlight {
    background: #fef3c7;
    border-radius: 8px;
    font-weight: 700;
    border: 2px solid #fbbf24;
}

.row-label { font-weight: 600; color: #334155; }

.col-managed, .col-vanguard, .col-difference { text-align: center; font-weight: 600; }
.col-managed { color: #dc2626; }
.col-vanguard { color: #16a34a; }
.col-difference.negative { color: #dc2626; font-weight: 700; }
.col-difference.large { font-size: 18px; }

.chart-container {
    margin: 40px 0;
    padding: 20px;
    background: #f8fafc;
    border-radius: 12px;
}

.chart-container h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #1e293b;
    text-align: center;
}

.insights-section { margin-top: 40px; }
.insights-section h3 { font-size: 22px; margin-bottom: 20px; color: #1e293b; }

.insight-box {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: #f8fafc;
    border-left: 4px solid #3b82f6;
    border-radius: 8px;
    margin-bottom: 15px;
}

.insight-icon { font-size: 32px; flex-shrink: 0; }
.insight-content { font-size: 15px; color: #334155; line-height: 1.6; }
.insight-content strong { color: #1e293b; }
.insight-content em { color: #64748b; }

.calculator-footer {
    margin-top: 50px;
    padding: 20px;
    text-align: center;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.donate-text { color: #64748b; font-size: 14px; margin-right: 15px; }
.donate-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: #0070ba;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.2s;
}
.donate-btn:hover { background: #005a94; }
.donate-dot { width: 8px; height: 8px; background: white; border-radius: 50%; }

@media (max-width: 768px) {
    header h1 { font-size: 24px; }
    .subtitle { font-size: 16px; }
    .comparison-header, .comparison-row { grid-template-columns: 1fr; gap: 8px; text-align: left !important; }
    .comparison-header > div, .comparison-row > div { text-align: left !important; }
    .cost-amount { font-size: 36px; }
    .insight-box { flex-direction: column; text-align: center; }
}

.info-box-blue {
    background: #e7f3ff;
    border-left: 4px solid #2196F3;
    padding: 20px;
    margin: 30px 0;
    border-radius: 8px;
}
.info-box-blue h2 { color: #2196F3; margin-top: 0; font-size: 20px; margin-bottom: 10px; }
.info-box-blue p { margin-bottom: 0; color: #1e293b; line-height: 1.6; }