/*.math-loading {
    visibility: hidden;
}*/
.formulas-container mjx-container {
    margin-bottom: 20px !important;
}

mjx-container {
    display: inline-block !important;
    margin: 0px !important;
    margin-left: 1px !important;
    margin-right: 1px !important;
    padding: 0 0 !important;
}

.calculator-result mjx-container, .do2 mjx-container {
    margin-bottom: 10px !important;
    color: #282828 !important;
}

@media (max-width: 768px) {
    .calculator-result mjx-container, .do2 mjx-container {
        font-size: 16px !important;
    }
}
.calc-section {
    background-color: #ffffff;
    border-radius: 0px;
    padding: 17px;
    margin-top: 10px;
    margin-bottom: 25px;
    border: unset;
    box-sizing: border-box;
    overflow: hidden;
}

@media (min-width: 768px) {
    .calc-section {
        border-radius: 12px;
        border: 1px solid var(--border-color);
        padding: 25px;
    }
}

.theory-section {
    padding: 0; 
}

.theory-article {
    padding: 25px;
    padding-left: 25px;
    padding-right: 25px;
}

@media (min-width: 768px) {
    .theory-article {
        padding: 25px;
        padding-left: 45px;
        padding-right: 45px;
    }
}

.calc-section h1,
.calc-section h2 {
    display: block;
    color: var(--color-main);
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 24px;
    font-weight: 700;
}

@media (max-width: 768px) {
    .calc-section h1,
    .calc-section h2 {
        line-height: 23px;
        font-size: 20px !important;
        font-weight:700;
    }
}

.calc-section h2 {
    font-size: 20px; 
}

.calc-section h3 {
    font-size: 18px;
    color: var(--color-main);
    text-align: center;
    font-weight: 700;
}

.calc-section p {
    color: var(--text);
    line-height: 1.6;
    margin-bottom: 15px;
    font-size: 16px;
}

    .calc-section p:last-child {
        margin-bottom: 0;
    }

.theory-article hr {
    margin-top: 30px;
    margin-bottom: 30px;
}

.theory-article strong {
    color: var(--strong);
    font-weight: 600 !important;
}

.theory-article .do2 {   
    color: var(--text);
    background-color: unset;   
}

.theory-article th {
    font-weight: 600 !important;
}

.calc-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-label {
    color: var(--color2);
    font-size: 15px;
}

.calc-input {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    background-color: var(--bg-main);
    color: #333;
    transition: border-color 0.2s, box-shadow 0.2s;
}

    .calc-input:focus {
        outline: none;
        border-color: var(--color-main);
        box-shadow: 0 0 0 3px rgba(73, 88, 105, 0.1); 
    }

    .calc-input::placeholder {
        color: #999;
    }

.calc-btn {
    background-color: var(--color-main);
    color: #ffffff;
    padding: 13px 25px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    align-self: flex-start; 
}

    .calc-btn:hover {
        background-color: var(--color2);
    }

    .calc-btn:active {
        transform: scale(0.98);
    }

.calc-error {
    color: #d9534f;
    font-size: 14px;
    background-color: rgba(217, 83, 79, 0.05);
    padding: 10px;
    border-radius: 6px;
    border-left: 3px solid #d9534f;
}

.input-help {
    background-color: var(--bg-main);
    border-radius: 8px;
    border: 1px dashed var(--border-color);
}

.help-details summary {
    padding: 12px 15px;
    cursor: pointer;
    color: var(--color-main);
    font-weight: 600;
    font-size: 14px;
    outline: none;
    list-style: none; 
    position: relative;
}

    .help-details summary::-webkit-details-marker {
        display: none; 
    }

    .help-details summary::before {
        content: '▶';
        display: inline-block;
        margin-right: 8px;
        font-size: 10px;
        transition: transform 0.2s;
    }

.help-details[open] summary::before {
    transform: rotate(90deg);
}

.help-content {
    padding: 0 15px 15px 15px;
}

    .help-content ul {
        margin: 0;
        padding-left: 20px;
        color: var(--text);
        list-style-type: disc;
    }

    .help-content li {
        margin-bottom: 6px;
        font-size: 14px;
    }

    .help-content span {
        font-weight: 600;
        color: var(--color2);
    }

    .help-content code {
        background-color: rgba(0, 0, 0, 0.05);
        padding: 2px 6px;
        border-radius: 4px;
        font-family: 'Courier New', Courier, monospace;
        color: var(--highl);
        font-size: 13px;
    }

.calculator-result {
    margin-top: 20px;
}
.formula-derivation {
  
}
    .formula-derivation summary {
    background-color: var(--border-color) !important;
}

    .formula-derivation .result-example-content {
        border: unset !important;
    }

.solution-details summary {
    font-size: 14px;
    padding: 12px 15px;
    background-color: var(--bg-main);
    border-radius: 8px;
    border: 1px dashed var(--border-color);
    cursor: pointer;
    font-weight: 600;
    color: var(--color-main);
    outline: none;
    transition: background-color 0.2s;
}
    .solution-details summary:hover {
      
    }

.solution-details[open] summary {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-bottom-color: transparent;
}

.result-example-content {
    padding: 20px;
    display: block;
    overflow-x: auto;
    overflow-y: hidden;
    width: -webkit-fill-available;
    width: -moz-available;
    color: #151515;
    background-color: var(--bg-main);
    border-radius: 12px;
    border-top-left-radius: unset;
    border-top-right-radius: unset;
    border: 1px solid var(--border-color);
    border-style: dotted;
}

.formulas-notations {
    text-align: center;
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
    padding: 25px 15px;
    background-color: var(--bg-main);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin: 25px 0;
    color: var(--color2);
}

    .formulas-notations b {
        color: var(--color-main);
        font-size: 18px;
        margin-bottom: 15px;
        display: block;
    }

    .formulas-notations img {
        width: 100%;
        max-width: 300px;
        height: auto;
        margin-bottom: 20px;
        border-radius: 6px;
        background: #fff;
        padding: 10px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    }

.math-formula {
    font-size: 22px;
    font-weight: bold;
    color: #222;
    margin-bottom: 15px;
}

.notation-item {
    margin-bottom: 6px;
    color: var(--text);
    font-size: 15px;
}

.important-note {
    background-color: var(--bg-main);
    border-left: 2px solid var(--border-color);
    padding: 15px 20px;
    margin: 25px 0;
    border-radius: 0 6px 6px 0;
    color: var(--text);
    line-height: 1.6;
}

    .important-note strong {
        color: var(--strong);
        font-weight: 600 !important;
    }

.theory-visual-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 25px 0;
}

.geometry-figure {
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 100%;
    margin-bottom: 10px;
}

    .geometry-figure img {
        width: 100%;
        max-width: 300px;
        height: auto; 
        border-radius: 6px;
        background-color: #ffffff;
        padding: 10px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    }

    .geometry-figure figcaption {
        margin-top: 12px;
        color: var(--text);
        font-size: 14px;
        font-style: italic;
        line-height: 1.4;
    }

.formulas-container {
 
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    border-top: 1px dashed var(--border-color);
    padding-top: 20px;
}

.math-formula {
    font-size: 20px;
    font-weight: bold;
    color: var(--text);
    margin-bottom: 15px;
    text-align: center;
}

.notation-list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: auto;
    text-align: left; 
}

    .notation-list li {
        font-size: 15px;
        color: var(--text);
        margin-bottom: 8px;
        align-items: center;
        gap: 5px;
    }

        .notation-list li:last-child {
            margin-bottom: 0;
        }

        .notation-list li span {
            font-weight: 700;
            color: var(--color-main);
            min-width: 25px; 
            text-align: center;
            display: inline-block;
        }


.calc-input-group {
    display: flex;
    align-items: center;
    gap: 15px; 
    margin-bottom: 15px; 
    width: 100%;
    max-width: 400px; 
}

.group-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--color2);
    min-width: 45px; 
    text-align: right;
}

.group-controls {
    display: flex;
    flex: 1; 
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden; 
    transition: none; 
}

    .group-controls:focus-within {
        border: 1px solid var(--border-color) !important;
        outline: none !important;
        box-shadow: none !important;
    }

.group-input {
    flex: 1; 
    border: none !important; 
    background: transparent !important;
    padding: 12px 15px;
    font-size: 16px;
    color: #333;
    outline: none !important;
    width: 100%;
}

    .group-input:focus {
        outline: none !important;
        border: none !important;
        box-shadow: none !important;
    }
.group-select {
    border: none !important; 
    border-left: 1px solid var(--border-color) !important;
    background-color: #ffffff !important;
    padding: 0 10px;
    font-size: 14px;
    color: var(--text);
    cursor: pointer;
    outline: none !important;
    text-align: center;
    width: 70px; 
}
    .group-select:hover {
        color: var(--color-main);
    }

    .group-select:focus {
        outline: none !important;
        border: none !important;
        border-left: 1px solid var(--border-color) !important;
    }
.clear-btn {
    background: transparent;
    border: none;
    color: #ccc;
    font-size: 14px;
    padding: 0 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
    outline: none !important;
}

    .clear-btn:hover {
        color: #999; 
    }

.combined-action-group {
    display: flex;
    align-items: stretch; 
    border-radius: 7px; 
    overflow: hidden; 
    border: 1px solid var(--border-color);
    width: max-content; 
    background-color: #ffffff;
    margin-left: 60px;
}

.combined-btn {
    background-color: var(--color-main) !important;
    color: #ffffff !important;
    padding: 9px 15px;
    border: none !important;
    font-size: 15px;
    cursor: pointer;
    outline: none !important;
    transition: background-color 0.2s, opacity 0.1s;
    border-top-left-radius: 7px !important;
    border-bottom-left-radius: 7px !important;
    border-top-right-radius: 0 !important; 
    border-bottom-right-radius: 0 !important;
}
    .combined-btn:hover {
        background-color: #495869c7 !important; 
    }

    .combined-btn:active {
        opacity: 0.9;
    }

.combined-select {
    background-color: var(--bg-main) !important;
    color: var(--text) !important;
    padding: 0 15px;
    border: none !important;
    border-left: 1px solid var(--border-color) !important; 
    font-size: 14px;
    cursor: pointer;
    outline: none !important;
    text-align: center;
    border-top-right-radius: 7px !important;
    border-bottom-right-radius: 7px !important;
    border-top-left-radius: 0 !important; 
    border-bottom-left-radius: 0 !important;
}

    .combined-select:hover {
        color: var(--color-main) !important;
    }

    .combined-select:focus {
        outline: none !important;
        box-shadow: none !important;
    }

.combined-action-group {
    position: relative;
    overflow: hidden;
}

    .combined-action-group.is-loading {
        pointer-events: none !important; 
    }
        .combined-action-group.is-loading .combined-btn {
            pointer-events: none !important; 
            cursor: not-allowed !important;
            animation: pulseBg 4.5s ease-in-out infinite alternate !important;
        }
        .combined-action-group.is-loading::after {
            content: '';
            display: block !important;
            position: absolute;
            top: 0;
            left: -100%;
            width: 50%;
            height: 100%;
            background: linear-gradient( 90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.4) 50%, rgba(255, 255, 255, 0) 100% );
            transform: skewX(-30deg);
            animation: shimmerEffect 3s ease-in-out infinite !important;
            z-index: 10;
        }
@keyframes shimmerEffect {
    0% {
        left: -100%;
    }

    100% {
        left: 150%;
    }
}
@keyframes pulseBg {
    0% {
        background-color: var(--color-main) !important;
    }

    100% {
        background-color: var(--color2) !important;
    }
}
.unified-group {
    display: flex;
    align-items: stretch;
    background-color: #ffffff; 
}
.inner-label {
    background-color: var(--bg-main); 
    color: var(--color-main);
    font-weight: 600;
    font-size: 15px;
    padding: 0 15px;
    display: flex;
    align-items: center;
    border-right: 1px solid var(--border-color); 
    white-space: nowrap; 
    min-width: 90px; 
}
.group-select-full {
    flex: 1;
    border: none !important;
    background-color: #ffffff !important;
    padding: 12px 15px; 
    font-size: 16px;
    color: var(--text);
    cursor: pointer;
    outline: none !important;
    -webkit-appearance: menulist !important;
    -moz-appearance: menulist !important;
    appearance: menulist !important;
}
.unified-group:focus-within {
    border: 1px solid var(--border-color) !important;
    outline: none !important;
    box-shadow: none !important;
}
.group-label-static {
    background-color: white !important;
    color: var(--color-main) !important; 
    font-weight: 600;
    font-size: 14px;
    padding: 0 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-left: 1px solid var(--border-color) !important; 
    white-space: nowrap;
    min-width: 70px; 
    box-sizing: border-box;
}
.unified-checkbox-group {
    display: flex;
    align-items: stretch;
    background-color: #ffffff;
    cursor: pointer;
    min-height: 44px; 
    box-sizing: border-box;
}
.checkbox-side {
    background-color: var(--bg-main);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px; 
    border-right: 1px solid var(--border-color);
    min-width: 40px;
    box-sizing: border-box;
}
.label-side {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 12px 15px; 
    background-color: #ffffff;
    box-sizing: border-box;
}
.custom-checkbox input {
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    appearance: none !important;
    width: 18px; 
    height: 18px; 
    cursor: pointer;
    margin: 0;
    background-color: #ffffff;
    border: 2px solid #ccc;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-sizing: border-box;
    transition: background-color 0.2s, border-color 0.2s;
}
    .custom-checkbox input:hover {
        border-color: var(--color-main);
    }
    .custom-checkbox input:checked {
        background-color: var(--color-main);
        border-color: var(--color-main);
    }
        .custom-checkbox input:checked::after {
            content: '';
            display: block;
            width: 6px;
            height: 6px;
            background-color: #ffffff;
            border-radius: 50%;
        }

.checkbox-text {
    font-size: 15px;
    color: var(--text);
    font-weight: 500;
    cursor: pointer;
    line-height: 1.2; 
}

.combined-action-group .combined-btn:only-child {
    border: unset !important;
}

.related-calculators {
    display: block;
    margin-top: 25px;
    border-style: solid;
    border-color: var(--border-color);
    border-left: unset;
    border-right: unset;
    border-bottom: unset;
    padding-top: 10px;
}

    .related-calculators a {
        color: var(--highl);
    }