/* --- General Tool Styling --- */
:root {
    --primary-color: #005f9e; /* Swedish Blue */
    --secondary-color: #ffb700; /* Swedish Yellow */
    --background-color: #f4f7fa;
    --card-background: #ffffff;
    --text-color: #333;
    --label-color: #555;
    --border-color: #dbe2e8;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.volume-converter-container {
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--card-background);
    color: var(--text-color);
    padding: 20px 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    max-width: 600px;
    margin: 20px auto;
    border-top: 5px solid var(--primary-color);
}

.tool-header {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary-color);
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
}

.tool-header .tool-icon {
    width: 32px;
    height: 32px;
}

.tool-header h3 {
    margin: 0;
    font-size: 1.5em;
    font-weight: 600;
}

h4 {
    font-size: 1.1em;
    color: var(--primary-color);
    margin-top: 25px;
    margin-bottom: 15px;
    font-weight: 600;
}

/* --- Input & Groups --- */
.input-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.input-wrapper label {
    display: block;
    font-size: 0.9em;
    color: var(--label-color);
    margin-bottom: 6px;
    font-weight: 500;
}

input[type="number"], select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--background-color);
    font-size: 1em;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input[type="number"]:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 95, 158, 0.2);
}

/* --- Results Grid --- */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.result-item {
    background-color: var(--background-color);
    padding: 12px;
    border-radius: 6px;
    border-left: 4px solid var(--secondary-color);
}

.result-item .value {
    font-size: 1.25em;
    font-weight: 600;
    color: var(--primary-color);
    display: block;
    word-wrap: break-word;
}

.result-item .unit {
    font-size: 0.9em;
    color: var(--label-color);
}

/* --- Optional Water Calculator --- */
.optional-group {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px dashed var(--border-color);
}
.optional-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.optional-tag {
    font-size: 0.8em;
    color: var(--label-color);
    font-weight: 400;
}
.tooltip-icon {
    font-family: serif;
    font-weight: bold;
    cursor: help;
    border: 1px solid var(--label-color);
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--label-color);
}
.weight-result {
    margin-top: 15px;
    background-color: var(--background-color);
    padding: 15px;
    border-radius: 6px;
    text-align: center;
}
.weight-result p {
    margin: 0 0 8px 0;
    color: var(--label-color);
}
#waterWeightResult {
    font-size: 1.4em;
    font-weight: 700;
    color: var(--primary-color);
}

/* --- Visual Chart --- */
.chart-container {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    height: 150px;
    padding: 10px 10px 0 10px;
    background-color: var(--background-color);
    border-radius: var(--border-radius);
    gap: 15px;
}
.chart-bar-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.chart-bar {
    width: 100%;
    background-color: var(--primary-color);
    border-radius: 4px 4px 0 0;
    transition: height 0.4s ease-in-out;
    position: relative;
}
.chart-bar .bar-value {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8em;
    font-weight: 600;
    color: var(--text-color);
}
.chart-label {
    margin-top: 8px;
    font-size: 0.85em;
    color: var(--label-color);
    font-weight: 500;
}


/* --- Mobile Responsiveness --- */
@media (max-width: 640px) {
    .volume-converter-container {
        padding: 15px;
    }
    .tool-header h3 {
        font-size: 1.3em;
    }
    .input-group, .results-grid {
        grid-template-columns: 1fr;
    }
}






table {
            border-collapse: collapse;
            width: 100%;
            margin: 20px 0;
        }
        th, td {
            border: 1px solid #ddd;
            padding: 8px;
            text-align: left;
        }
        th {
            background-color: #f2f2f2;
        }
        tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        .note {
            background-color: #e7f3fe;
            padding: 15px;
            border-left: 6px solid #2196F3;
            margin: 20px 0;
        }