:root {
    --primary-color: #3498db;
    --background-color: #f4f7f6;
    --card-bg-color: #ffffff;
    --border-color: #e0e0e0;
    --text-color: #333;
    --font-family: 'Poppins', Tahoma, Geneva, Verdana, sans-serif;
}



.container {
    width: 100%;
    max-width: 800px;
}

.title {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 2.2em;
    font-weight: 600;
    text-align: left;
}

.main-content {
    display: flex;
    gap: 30px;
}

.input-section {
    flex: 1;
}

.result-section {
    flex: 1;
}

form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.input-group {
    text-align: left;
}

.input-row {
    display: flex;
    gap: 20px;
}

.input-row .input-group {
    flex: 1;
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 9px;
    font-size: 0.9em;
}

input[type="number"] {
    width: 100%;
    min-width: 80px;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    box-sizing: border-box;
}

.input-with-units {
    display: flex;
    gap: 10px;
}

.imperial-units {
    display: flex;
    gap: 10px;
    flex: 1;
}

.imperial-units input {
    flex: 1;
}

.unit-select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--card-bg-color);
    cursor: pointer;
}

button {
    background-color: var(--primary-color);
    color: white;
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #2980b9;
}

.error-message {
    color: #e74c3c;
    font-size: 0.9em;
    margin-top: 10px;
    text-align: center;
}

/* Updated Gauge Design */
.results-container {
    display: block;
}

.result-card {
    background-color: var(--card-bg-color);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 30px;
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.result-card h2 {
    font-size: 1.8em;
    color: #2d3748;
    margin-bottom: 20px;
}

.gauge-container {
    position: relative;
    width: 300px;
    height: 200px;
    margin: 0 auto;
    overflow: hidden;
}

.gauge {
    position: relative;
    width: 300px;
    height: 150px;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.gauge-segment {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-origin: center bottom;
    border-radius: 150px 150px 0 0;
    clip-path: polygon(50% 0, 100% 0, 100% 100%, 50% 100%);
    z-index: 2;
}

.gauge-segment.red-segment:nth-of-type(1) { background-color: #e53e3e; transform: rotate(-135deg); }
.gauge-segment.yellow-segment:nth-of-type(1) { background-color: #f6ad55; transform: rotate(-45deg); }
.gauge-segment.green-segment { background-color: #FFE10; transform: rotate(0deg); }
.gauge-segment.yellow-segment:nth-of-type(2) { background-color: #f6ad55; transform: rotate(45deg); }
.gauge-segment.red-segment:nth-of-type(2) { background-color: #e53e3e; transform: rotate(135deg); }


.gauge-center-circle {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translate(-50%, 50%);
    width: 150px;
    height: 140px;
    background-color: #fff;
    border-radius: 50%;
    z-index: 5;
    box-shadow: 0 -5px 15px rgba(0, 0, 0, 0.1);
}

.gauge-value-display {
    position: absolute;
    top: 25%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 16;
}

#bmi-value-text {
    font-size: 2.2em;
    font-weight: 700;
    color: black;
    display: block;
}

#bmi-category {
    font-size: 1.4em;
    font-weight: 600;
    margin-top: -10px;
    display: block;
    color: black;
}

.gauge-pointer {
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 120px;
    transform-origin: bottom center;
    transition: transform 1.5s cubic-bezier(0.19, 1, 0.22, 1);
    z-index: 15;
    transform: rotate(180deg) translateX(-50%);
}

.gauge-pointer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 20px solid #2d3748;
}

.gauge-pointer::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100px;
    background-color: #2d3748;
    border-radius: 2px;
}

.dial-markers {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 3;
}

.dial-markers span {
    position: absolute;
    top: 0;
    left: 50%;
    transform-origin: 0 100%;
    font-size: 1.2em;
    font-weight: bold;
    color: #000000;
    height: 100%;
    text-align: center;
    padding-top: 10px;
    width: 25px;
    transform: rotate(var(--marker-angle)) translateY(50px) translateX(-50%);
}

.dial-labels {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 4;
}

.dial-labels span {
    position: absolute;
    top: 0;
    left: 50%;
    transform-origin: 0 100%;
    font-size: 0.9em;
    font-weight: 600;
    color: #000000;
    height: 100%;
    text-align: center;
    width: 80px;
    transform: rotate(var(--label-angle)) translateY(20px) translateX(-50%);
}

.additional-metrics {
    list-style: none;
    padding: 0;
    text-align: left;
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.additional-metrics li {
    font-size: 1em;
    font-weight: 400;
}

.additional-metrics span {
    font-weight: 600;
    color: #2d3748;
}

@media (max-width: 900px) {
    .main-content {
        flex-direction: column;
    }
}