/* --- Main Container --- */
.circle-calculator-container {
    --primary-color: #007bff;
    --primary-light: #e6f2ff;
    --secondary-color: #495057;
    --border-color: #dee2e6;
    --background-color: #ffffff;
    --text-color: #212529;
    --label-color: #495057;
    --radius: 8px;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    
    font-family: var(--font-family);
    color: var(--text-color);
    background: var(--background-color);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    max-width: 900px;
    margin: 20px auto;
}

/* --- Layout --- */
.calculator-body {
    display: flex;
    gap: 32px;
    margin-top: 16px;
}

.calculator-main {
    flex: 1;
    min-width: 280px;
}

.calculator-visuals {
    flex: 1;
    min-width: 280px;
    border-left: 1px solid var(--border-color);
    padding-left: 32px;
}

/* --- Header --- */
.calculator-header h2 {
    margin: 0 0 4px 0;
    font-size: 24px;
    color: var(--text-color);
}

.calculator-header p {
    margin: 0;
    font-size: 15px;
    color: var(--label-color);
}

/* --- Input & Results --- */
.input-section, .results-section {
    margin-bottom: 24px;
}

h3 {
    font-size: 18px;
    color: var(--text-color);
    margin: 0 0 16px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.input-group {
    margin-bottom: 16px;
}

.input-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--label-color);
    margin-bottom: 6px;
}

.input-field-wrapper {
    display: flex;
    align-items: center;
}

.input-field-wrapper input[type="number"] {
    flex-grow: 1;
    width: 100%;
    padding: 10px 12px;
    font-size: 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: border-color 0.2s, box-shadow 0.2s;
    -moz-appearance: textfield; /* Firefox */
}
.input-field-wrapper input[type="number"]::-webkit-outer-spin-button,
.input-field-wrapper input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}


.input-field-wrapper input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.input-field-wrapper select, .input-field-wrapper .unit-label {
    margin-left: -1px; /* Overlap border */
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    background-color: #f8f9fa;
    color: var(--label-color);
    border-top-right-radius: var(--radius);
    border-bottom-right-radius: var(--radius);
    font-size: 16px;
}

.input-field-wrapper select {
    border-left: none;
    cursor: pointer;
}

.input-field-wrapper .unit-label {
    min-width: 50px;
    text-align: center;
}

.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.result-box {
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.result-box h4 {
    margin: 0 0 8px 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--label-color);
}

.result-box p {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
}

.result-box p span:last-child {
    font-size: 14px;
    font-weight: 400;
    color: var(--label-color);
}

.info-box {
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background-color: var(--primary-light);
    border-radius: var(--radius);
    font-size: 13px;
    color: #004a99;
}

.info-box svg {
    flex-shrink: 0;
}

/* --- Visualizer --- */
.circle-visualizer-wrapper {
    width: 100%;
    height: 240px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 24px;
}

.circle-visualizer {
    position: relative;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    background-color: var(--primary-light);
    transition: width 0.3s ease, height 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
}

.diameter-line, .radius-line {
    position: absolute;
    background-color: var(--secondary-color);
    transition: all 0.3s ease;
}

.diameter-line {
    width: 100%;
    height: 2px;
}

.radius-line {
    width: 50%;
    height: 2px;
    top: 50%;
    left: 0;
    transform-origin: left center;
}

.dimension-label {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 1px 4px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--secondary-color);
}

#diameter-label {
    top: calc(50% - 20px);
}
#radius-label {
    top: calc(50% + 4px);
    left: 25%;
    transform: translateX(-50%);
}

/* --- Infographics --- */
.infographics-bars .bar-item {
    margin-bottom: 12px;
}
.infographics-bars label {
    display: block;
    font-size: 13px;
    color: var(--label-color);
    margin-bottom: 4px;
}
.bar-container {
    width: 100%;
    background-color: #e9ecef;
    border-radius: var(--radius);
    overflow: hidden;
}
.bar {
    height: 24px;
    background: linear-gradient(90deg, #b3d7ff, var(--primary-color));
    color: white;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 8px;
    border-radius: 0 var(--radius) var(--radius) 0;
    white-space: nowrap;
    transition: width 0.4s ease-in-out;
}

/* --- Tooltip --- */
.tooltip-container {
    position: relative;
    cursor: help;
}
.tooltip-text {
    visibility: hidden;
    width: 220px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 8px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -110px;
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 12px;
}
.tooltip-container:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* --- Mobile Responsive --- */
@media (max-width: 820px) {
    .calculator-body {
        flex-direction: column;
    }
    .calculator-visuals {
        border-left: none;
        padding-left: 0;
        margin-top: 16px;
        border-top: 1px solid var(--border-color);
        padding-top: 32px;
    }
}
@media (max-width: 480px) {
    .circle-calculator-container {
        padding: 16px;
    }
    .results-grid {
        grid-template-columns: 1fr;
    }
}