/* ===========================
   Calculator Page Styles
   =========================== */

/* Calculator Hero */
.calculator-hero {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 120px 0 60px;
    text-align: center;
    color: #fff;
}

.calculator-hero h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
}

.calculator-hero h1 span {
    color: #00d4aa;
}

.calculator-hero p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Calculator Section */
.calculator-section {
    padding: 60px 0;
    background: #f8f9fa;
}

/* Calculator Tabs */
.calculator-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 40px;
}

.calc-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: #fff;
    border: 2px solid #e0e0e0;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    font-weight: 500;
    color: #555;
}

.calc-tab i {
    font-size: 1.1rem;
}

.calc-tab:hover {
    border-color: #00d4aa;
    color: #00d4aa;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 212, 170, 0.2);
}

.calc-tab.active {
    background: linear-gradient(135deg, #00d4aa 0%, #00a389 100%);
    border-color: #00d4aa;
    color: #fff;
    box-shadow: 0 5px 25px rgba(0, 212, 170, 0.4);
}

.calc-tab.active i {
    color: #fff;
}

/* Calculator Container */
.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: stretch;
}

/* Calculator Results Box (Right Side) */
.calculator-results-box {
    background: #fff;
    padding: 35px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
}

.calculator-results-box .calc-results {
    margin-top: 0;
    flex: 0;
}

.calculator-results-box .calc-chart {
    flex: 1;
    display: flex;
    flex-direction: column;
    margin-top: 25px;
}

.calculator-results-box .calc-chart h4 {
    text-align: center;
    color: #1a1a2e;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.calculator-results-box .calc-chart canvas {
    max-height: none;
    flex: 1;
}

/* Apply Button Container */
.apply-btn-container {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

/* Apply Button in Calculator Box */
.btn-apply {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 35px;
    font-size: 1rem;
    border-radius: 50px;
    background: linear-gradient(135deg, #e91e63 0%, #c2185b 100%);
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    width: auto;
    margin-top: 10px;
}

.btn-apply:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(233, 30, 99, 0.4);
    background: linear-gradient(135deg, #c2185b 0%, #ad1457 100%);
    color: #fff;
}

/* Calculator Box */
.calculator-box {
    background: #fff;
    padding: 35px;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.calc-header {
    margin-bottom: 30px;
}

.calc-header h3 {
    font-size: 1.5rem;
    color: #1a1a2e;
}

.calc-header h3 span {
    color: #e91e63;
}

/* Calculator Input Groups */
.calc-input-group {
    margin-bottom: 30px;
}

.calc-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.calc-label-row label {
    font-size: 0.95rem;
    color: #555;
    font-weight: 500;
}

.calc-value-box {
    display: flex;
    align-items: center;
    background: #fff;
    border: 2px solid #e91e63;
    border-radius: 8px;
    padding: 8px 15px;
    min-width: 140px;
}

.calc-value-box.small {
    min-width: 100px;
}

.calc-value-box .currency {
    color: #e91e63;
    font-weight: 600;
    margin-right: 5px;
}

.calc-value-box .suffix {
    color: #e91e63;
    font-weight: 600;
    margin-left: 5px;
}

.calc-value-box input {
    border: none;
    outline: none;
    font-size: 1rem;
    font-weight: 600;
    color: #1a1a2e;
    width: 100%;
    text-align: right;
    background: transparent;
}

.calc-value-box input::-webkit-outer-spin-button,
.calc-value-box input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Range Slider */
.range-slider {
    position: relative;
}

.range-slider input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(to right, #e91e63 0%, #e91e63 var(--value, 50%), #e0e0e0 var(--value, 50%), #e0e0e0 100%);
    border-radius: 5px;
    outline: none;
    cursor: pointer;
}

.range-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    background: #fff;
    border: 3px solid #e91e63;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(233, 30, 99, 0.3);
    transition: all 0.2s ease;
}

.range-slider input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(233, 30, 99, 0.4);
}

.range-slider input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
    background: #fff;
    border: 3px solid #e91e63;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(233, 30, 99, 0.3);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 0.8rem;
    color: #999;
}

/* Calculator Results */
.calc-results {
    background: linear-gradient(135deg, #fce4ec 0%, #fff 100%);
    border-radius: 15px;
    padding: 25px;
    margin-top: 30px;
}

.result-main {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px dashed #e91e63;
}

.result-main .result-label {
    display: block;
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 5px;
}

.result-main .result-value {
    font-size: 2.8rem;
    font-weight: 700;
    color: #e91e63;
}

.result-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.result-item .label {
    display: block;
    font-size: 0.8rem;
    color: #888;
    margin-bottom: 5px;
}

.result-item .value {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1a1a2e;
}

/* Calculator Chart */
.calc-chart {
    margin-top: 30px;
    padding: 20px;
    background: #fafafa;
    border-radius: 15px;
}

.calc-chart canvas {
    max-height: 200px;
}

/* Formula Section */
.formula-section {
    padding: 60px 0;
    background: #fff;
}

.formula-section h2 {
    text-align: center;
    font-size: 2rem;
    color: #1a1a2e;
    margin-bottom: 40px;
}

.formula-box {
    max-width: 700px;
    margin: 0 auto;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 20px;
    padding: 40px;
    color: #fff;
}

.formula {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.formula p {
    font-size: 1.4rem;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    color: #00d4aa;
}

.formula-legend {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

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

.legend-item .symbol {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #e91e63;
    margin-bottom: 8px;
}

.legend-item .meaning {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.4;
}

/* Responsive Design */
@media (max-width: 992px) {
    .calculator-container {
        grid-template-columns: 1fr;
    }

    .calculator-results-box {
        order: 2;
    }

    .calculator-box {
        order: 1;
    }

    .calculator-results-box .calc-chart canvas {
        max-height: 280px;
    }

    .formula-legend {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .calculator-hero {
        padding: 100px 0 40px;
    }

    .calculator-hero h1 {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }

    .calculator-hero p {
        font-size: 0.95rem;
    }

    .calculator-section {
        padding: 40px 0;
    }

    .calculator-tabs {
        gap: 8px;
        margin-bottom: 25px;
        padding: 0 10px;
    }

    .calc-tab {
        padding: 10px 14px;
        font-size: 0.85rem;
        border-radius: 40px;
    }

    .calc-tab span {
        display: none;
    }

    .calc-tab i {
        font-size: 1.2rem;
        margin: 0;
    }

    .calculator-box {
        padding: 20px;
        border-radius: 15px;
    }

    .calc-header h3 {
        font-size: 1.2rem;
    }

    .calculator-results-box {
        padding: 20px;
        border-radius: 15px;
    }

    .calc-input-group {
        margin-bottom: 20px;
    }

    .calc-label-row label {
        font-size: 0.85rem;
    }

    .calc-value-box {
        min-width: 110px;
        padding: 6px 10px;
    }

    .calc-value-box input {
        font-size: 0.9rem;
    }

    .result-main .result-value {
        font-size: 1.8rem;
    }

    .result-main .result-label {
        font-size: 0.85rem;
    }

    .result-item .label {
        font-size: 0.75rem;
    }

    .result-item .value {
        font-size: 1.1rem;
    }

    .calc-results {
        padding: 20px;
        border-radius: 12px;
    }

    .calc-chart {
        padding: 15px;
        margin-top: 20px;
    }

    .calc-chart h4 {
        font-size: 1rem;
    }

    .btn-apply {
        padding: 12px 25px;
        font-size: 0.9rem;
    }

    .formula-section {
        padding: 40px 0;
    }

    .formula-section h2 {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }

    .formula-box {
        padding: 25px 15px;
    }

    .formula p {
        font-size: 0.9rem;
    }

    .formula-legend {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .legend-item .symbol {
        font-size: 1.2rem;
    }

    .legend-item .meaning {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .calculator-hero {
        padding: 90px 15px 30px;
    }

    .calculator-hero h1 {
        font-size: 1.5rem;
    }

    .calculator-section {
        padding: 30px 0;
    }

    .calculator-tabs {
        gap: 6px;
        justify-content: space-around;
    }

    .calc-tab {
        padding: 10px 12px;
        flex: 0 0 auto;
    }

    .calc-tab i {
        font-size: 1.1rem;
    }

    .calculator-box,
    .calculator-results-box {
        padding: 15px;
        margin: 0 -5px;
    }

    .calc-header h3 {
        font-size: 1.1rem;
    }

    .calc-label-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .calc-value-box {
        width: 100%;
        min-width: unset;
    }

    .calc-value-box.small {
        width: 100%;
        min-width: unset;
    }

    .range-slider input[type="range"]::-webkit-slider-thumb {
        width: 18px;
        height: 18px;
    }

    .range-labels {
        font-size: 0.7rem;
    }

    .result-main {
        padding-bottom: 15px;
        margin-bottom: 15px;
    }

    .result-main .result-value {
        font-size: 1.6rem;
    }

    .result-details {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .result-item .value {
        font-size: 1rem;
    }

    .calc-chart canvas {
        max-height: 200px !important;
    }

    .btn-apply {
        padding: 12px 20px;
        font-size: 0.85rem;
    }

    .formula-box {
        padding: 20px 10px;
        border-radius: 12px;
    }

    .formula p {
        font-size: 0.8rem;
        word-break: break-all;
    }
}

/* Touch-friendly improvements for mobile */
@media (hover: none) and (pointer: coarse) {
    .calc-tab {
        min-height: 44px;
    }

    .range-slider input[type="range"] {
        height: 8px;
    }

    .range-slider input[type="range"]::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }

    .range-slider input[type="range"]::-moz-range-thumb {
        width: 24px;
        height: 24px;
    }

    .calc-value-box input {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .btn-apply {
        min-height: 48px;
    }
}