/* Calculator pages aligned to the current equation-page style */
:root {
    --calc-bg: rgba(231, 218, 218, 0.99);
    --calc-border: rgba(200, 200, 200, 0.65);
    --calc-card-bg: #ffffff;
    --calc-line: #d7d7d7;
    --calc-soft: #f7f8fc;
    --calc-soft-2: #f2e5e6;
    --calc-muted: #5f6368;
    --calc-ink: #222222;
    --calc-accent: #7b2d39;
    --calc-accent-soft: #f8d7da;
    --calc-button: #555555;
    --calc-button-hover: #3d3d3d;
    --calc-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.12);
    --calc-input-label-width: 33%;
    --calc-input-field-width: 41%;
    --calc-select-width: 26%;
}

body {
    font-family: "Roboto", sans-serif;
    color: var(--calc-ink);
}

.calculator-page-shell.outer-container {
    background-color: var(--calc-bg);
    border: 1px solid var(--calc-border);
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
    padding: 20px;
    max-width: 90%;
}

.calculator-layout {
    align-items: stretch;
}

.calculator-layout > .card {
    height: 100%;
}

.calculator-help-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    border: 1px solid #d6c1c4;
    background: #fff;
    border-radius: 999px;
    color: var(--calc-ink);
    padding: 0.5rem 0.9rem;
    font-weight: 500;
    line-height: 1;
}

.calculator-help-btn:hover,
.calculator-help-btn:focus-visible {
    background: var(--calc-soft-2);
    color: var(--calc-ink);
    border-color: #cda7ad;
}

.calculator-help-btn .material-symbols-outlined {
    font-size: 1.1rem;
}

.calculator-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.65rem 0.9rem;
    border-radius: 999px;
    background: var(--calc-soft);
    border: 1px solid #e7e7ea;
}

.calculator-toggle .form-check-input {
    margin-top: 0;
    float: none;
}

.calculator-form {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.calculator-inputs {
    display: grid;
    gap: 0.9rem;
}

.input-group-calculator {
    display: flex;
    flex-wrap: nowrap;
    align-items: stretch;
    background: #fafafa;
    border: 1px solid #e5e5e8;
    border-radius: 14px;
    padding: 0.45rem;
    gap: 0.45rem;
}

.input-group-calculator .input-group-text.label-col {
    width: var(--calc-input-label-width);
    flex: 0 0 var(--calc-input-label-width);
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    background-color: var(--calc-accent-soft);
    color: var(--calc-accent);
    border: 1px solid #e9c4ca;
    border-radius: 10px;
    font-weight: 500;
    line-height: 1.25;
    min-height: 52px;
}

.input-group-calculator .form-control {
    width: var(--calc-input-field-width);
    flex: 0 0 var(--calc-input-field-width);
    border-radius: 10px;
    border: 1px solid #d6d6da;
    min-height: 52px;
    box-shadow: none;
}

.input-group-calculator .form-select {
    width: var(--calc-select-width);
    flex: 0 0 var(--calc-select-width);
    border-radius: 10px;
    border: 1px solid #d6d6da;
    min-height: 52px;
    box-shadow: none;
}

.input-group-calculator .form-control:focus,
.input-group-calculator .form-select:focus {
    border-color: #b36b75;
    box-shadow: 0 0 0 0.18rem rgba(123, 45, 57, 0.12);
}

input[readonly] {
    background-color: #f2dede;
    color: #555;
    border-color: #e6bcbc;
    cursor: not-allowed;
}

.calculator-actions {
    display: flex;
    justify-content: flex-start;
}

.bulk-btn#clearButton {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    background: var(--calc-button);
    color: #fff;
    border: none;
    border-radius: 999px;
    padding: 0.7rem 1.1rem;
    font-weight: 500;
}

.bulk-btn#clearButton:hover,
.bulk-btn#clearButton:focus-visible {
    background: var(--calc-button-hover);
    color: #fff;
    transform: translateY(-1px);
}

.bulk-btn#clearButton .material-symbols-outlined {
    font-size: 1.05rem;
}

.equations-stage {
    display: grid;
    gap: 0.9rem;
    align-content: start;
}

.calculator-equation {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 82px;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    background: linear-gradient(180deg, #fafafa 0%, #f1f1f1 100%);
    border: 1px solid #e0e0e0;
    overflow-x: auto;
}

.calculator-equation .katex-display {
    margin: 0;
}

.popover {
    border-radius: 14px;
    border: 1px solid #dfc7cb;
    box-shadow: var(--calc-shadow);
    max-width: 360px;
}

.popover-header {
    background: var(--calc-soft-2);
    color: var(--calc-ink);
    border-bottom: 1px solid #ead7da;
    font-weight: 700;
}

.popover-body {
    color: var(--calc-ink);
    line-height: 1.5;
}

.copy-tooltip {
    position: absolute;
    background-color: rgba(123, 45, 57, 0.96);
    color: #fff;
    padding: 0.45rem 0.7rem;
    border-radius: 10px;
    font-size: 0.88rem;
    z-index: 1000;
    pointer-events: none;
    box-shadow: var(--calc-shadow);
}

.modal-dialog.modal-sm {
    max-width: 300px;
}

.modal-content {
    background-color: #ffcccb;
    border-radius: 10px;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
}

.modal-body {
    padding: 10px 20px;
}

.modal-body p {
    font-size: 0.9rem;
    color: #333;
}

.modal-dialog {
    margin: 0;
    transform: none;
    max-width: none;
}

.speech-bubble {
    background-color: #ffc0cb;
    border-radius: 8px;
    border: none;
    padding: 10px;
    position: relative;
    display: inline-block;
    max-width: 300px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}

.speech-bubble::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 20px;
    width: 0;
    height: 0;
    border: 10px solid transparent;
    border-top-color: #ffc0cb;
}

@media (max-width: 1199px) {
    .calculator-page-shell.outer-container {
        max-width: 96%;
        padding: 14px;
    }
}

@media (max-width: 991px) {
    :root {
        --calc-input-label-width: 100%;
        --calc-input-field-width: 100%;
        --calc-select-width: 100%;
    }

    .calculator-layout {
        grid-template-columns: 1fr;
    }

    .input-group-calculator {
        flex-wrap: wrap;
    }

    .input-group-calculator .input-group-text.label-col,
    .input-group-calculator .form-control,
    .input-group-calculator .form-select {
        width: 100%;
        flex: 0 0 100%;
    }

    .calculator-help-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 767px) {
    .calculator-page-shell.outer-container {
        padding: 12px;
    }

    .calculator-help-btn,
    .bulk-btn#clearButton {
        width: 100%;
        justify-content: center;
    }

    .calculator-equation {
        min-height: 74px;
        padding: 0.8rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .calculator-help-btn,
    .bulk-btn#clearButton,
    .copy-tooltip {
        transition: none;
    }
}