/* ===== Calculator Section Styles ===== */
.calculator-section {
    display: none;
    min-height: calc(100vh - 80px);
    background: var(--background);
    padding: 2rem;
}

.calculator-section.active {
    display: block;
}

.calculator-container {
    max-width: 1400px;
    margin: 0 auto;
}

.calculator-header {
    background: var(--card-white);
    padding: 2rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.back-button {
    background: var(--body-gray);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.back-button:hover {
    background: #3c4043;
    transform: scale(0.98);
}

.calculator-title {
    font-size: 2rem;
    color: var(--heading-black);
    margin-top: 1.5rem;
    font-weight: 700;
}

.calculator-content,
.main-content {
    display: grid;
    grid-template-columns: 60% 40%;
    gap: 2rem;
    align-items: start;
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.left-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.right-panel {
    position: sticky;
    top: 100px;
    align-self: start;
}

.card {
    background: var(--card-white);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--heading-black);
    margin-bottom: 1.5rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-label {
    display: block;
    margin-bottom: 10px;
    font-size: 16px;
    font-weight: 600;
    color: var(--body-gray);
}

.input-number {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    border: 2px solid var(--border-gray);
    border-radius: var(--radius-sm);
    font-size: 16px;
    transition: border-color 0.3s, box-shadow 0.3s;
    font-family: var(--font-family);
}

.input-number:focus {
    outline: none;
    border-color: var(--brand-blue);
    box-shadow: 0 0 0 3px var(--light-blue);
}

select, .input-select {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    border: 2px solid var(--border-gray);
    border-radius: var(--radius-sm);
    font-size: 16px;
    transition: border-color 0.3s, box-shadow 0.3s;
    font-family: var(--font-family);
    background: var(--card-white);
    cursor: pointer;
}

select:focus, .input-select:focus {
    outline: none;
    border-color: var(--brand-blue);
    box-shadow: 0 0 0 3px var(--light-blue);
}

.btn-add, .btn-primary {
    height: 48px;
    padding: 0 24px;
    background: var(--brand-blue);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
}

.btn-add:hover, .btn-primary:hover {
    background: var(--hover-blue);
    transform: scale(0.98);
}

@media (max-width: 968px) {
    .calculator-content,
    .main-content {
        grid-template-columns: 1fr;
    }

    .right-panel {
        position: relative;
        top: auto;
    }
}

/* ===== Calculator Specific Styles ===== */

.historical-row {
    display: grid;
    grid-template-columns: 0.8fr 1fr 1fr 1fr 0.8fr 0.5fr;
    gap: 10px;
    margin-bottom: 10px;
    align-items: center;
}

.input-wrapper {
    display: contents;
}

.historical-header {
    font-weight: 600;
    font-size: 12px;
    color: var(--body-gray);
    padding: 10px 8px;
    border-bottom: 2px solid var(--border-gray);
    text-align: center;
}

.historical-header > div {
    padding: 0;
}

.historical-input {
    padding: 8px;
    border: 1px solid var(--border-gray);
    border-radius: var(--radius-sm);
    font-size: 14px;
    width: 100%;
    box-sizing: border-box;
    font-family: var(--font-family);
    transition: border-color 0.3s, box-shadow 0.3s;
}

.historical-input:focus {
    outline: none;
    border-color: var(--brand-blue);
    box-shadow: 0 0 0 2px var(--light-blue);
}

.historical-table {
    margin-bottom: 15px;
}

.return-rate {
    padding: 8px;
    background: var(--background);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
    width: 100%;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
}

.return-positive {
    color: var(--brand-blue);
}

.return-negative {
    color: #dc3545;
}

.btn-remove {
    padding: 8px;
    background: #ff6b6b;
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
    width: 100%;
    min-height: 36px;
    transition: background 0.3s, transform 0.2s;
}

.btn-remove:hover {
    background: #e55555;
    transform: scale(0.98);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-top: 25px;
    padding: 20px;
    background: var(--background);
    border-radius: var(--radius-md);
}

.stat-item {
    text-align: center;
}

.stat-label {
    font-size: 12px;
    color: var(--body-gray);
    margin-bottom: 5px;
}

.stat-value {
    font-size: 20px;
    font-weight: 600;
    color: var(--heading-black);
}

.result-box {
    background: linear-gradient(135deg, var(--brand-blue) 0%, #764ba2 100%);
    border-radius: var(--radius-lg);
    padding: 25px;
    color: white;
    margin-top: 25px;
    box-shadow: var(--shadow-md);
}

.result-title {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 10px;
}

.result-value {
    font-size: 36px;
    font-weight: 700;
}

.chart-container {
    height: 300px;
    margin-top: 25px;
    position: relative;
    background: var(--background);
    border-radius: var(--radius-md);
    padding: 20px;
}

.slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-gray);
    outline: none;
    -webkit-appearance: none;
    margin-top: 10px;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--brand-blue);
    cursor: pointer;
}

.slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--brand-blue);
    cursor: pointer;
    border: none;
}

/* Mobile responsive styles for calculators */
@media (max-width: 768px) {
    .historical-row {
        grid-template-columns: 1fr;
        gap: 12px;
        font-size: 13px;
        background: #f8f9fa;
        padding: 12px;
        border-radius: 8px;
        margin-bottom: 15px;
    }

    .historical-header {
        display: none;
    }

    .input-wrapper,
    .historical-row > .return-rate,
    .historical-row > .btn-remove {
        display: flex;
        flex-direction: column;
        gap: 5px;
    }

    .input-wrapper::before,
    .historical-row > .return-rate::before {
        content: attr(data-label);
        font-weight: 600;
        color: #666;
        font-size: 12px;
        display: block;
    }

    .input-wrapper input {
        width: 100%;
    }

    .historical-input {
        padding: 10px;
        font-size: 14px;
    }

    .btn-remove {
        width: 100%;
        margin-top: 8px;
        padding: 12px;
        font-size: 14px;
        min-height: 40px;
    }

    .stats-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
        padding: 15px !important;
    }

    .chart-container {
        height: 250px;
        padding: 15px;
    }

    .result-value {
        font-size: 28px;
    }

    .result-title {
        font-size: 14px;
    }

    .stat-value {
        font-size: 18px !important;
    }

    .stat-label {
        font-size: 11px;
    }
}