:root {
    --primary-color: #1a1a2e;
    --secondary-color: #16213e;
    --accent-color: #0f3460;
    --highlight-color: #e94560;
    --text-color: #ffffff;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--primary-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    background-image: linear-gradient(to bottom right, var(--primary-color), var(--secondary-color));
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--highlight-color);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.8;
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .calculator-container {
        grid-template-columns: 1fr;
    }
}

.calculator-section {
    background-color: var(--secondary-color);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--box-shadow);
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--highlight-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 8px;
}

.input-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

select, input {
    width: 100%;
    padding: 10px;
    border-radius: var(--border-radius);
    border: 1px solid var(--accent-color);
    background-color: var(--primary-color);
    color: var(--text-color);
    font-size: 1rem;
}

select:focus, input:focus {
    outline: none;
    border-color: var(--highlight-color);
}

.input-hint {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: 5px;
}

.button {
    background-color: var(--highlight-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    width: 100%;
    margin-top: 10px;
}

.button:hover {
    background-color: #d6335c;
    transform: translateY(-2px);
}

.result-box {
    background-color: var(--accent-color);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-top: 20px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
}

.reset-button {
    background-color: transparent;
    border: 1px solid var(--highlight-color);
    color: var(--highlight-color);
}

.reset-button:hover {
    background-color: rgba(233, 69, 96, 0.2);
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    opacity: 0.7;
    font-size: 0.9rem;
}

.disclaimer {
    font-size: 0.8rem;
    margin-top: 10px;
    opacity: 0.6;
}

.error-message {
    color: #ff6b6b;
    margin-top: 10px;
    font-weight: 500;
}

.success-message {
    color: #51cf66;
    margin-top: 10px;
    font-weight: 500;
}

.results-details {
    margin-top: 20px;
}

.detail-item {
    background-color: var(--primary-color);
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 10px;
}

.detail-title {
    font-weight: 600;
    color: var(--highlight-color);
    margin-bottom: 5px;
}

.skiing-tips {
    margin-top: 30px;
}

.tips-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.tip-item {
    background-color: var(--primary-color);
    padding: 15px;
    border-radius: var(--border-radius);
}

.tip-item h4 {
    color: var(--highlight-color);
    margin-bottom: 8px;
}

.sizing-guide {
    margin-top: 20px;
}

.guide-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .guide-container {
        grid-template-columns: 1fr;
    }
}

.guide-section {
    background-color: var(--primary-color);
    padding: 15px;
    border-radius: var(--border-radius);
}

.sizing-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    font-size: 0.9rem;
}

.sizing-table th, .sizing-table td {
    padding: 10px;
    text-align: center;
    border: 1px solid var(--accent-color);
}

.sizing-table th {
    background-color: var(--accent-color);
    font-weight: 600;
}

.sizing-table tr:nth-child(even) {
    background-color: rgba(15, 52, 96, 0.3);
}

.style-recommendations {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin-top: 15px;
}

.style-item {
    background-color: rgba(15, 52, 96, 0.3);
    padding: 12px;
    border-radius: var(--border-radius);
}

.style-item h4 {
    color: var(--highlight-color);
    margin-bottom: 5px;
}

.recommendation-box {
    background: linear-gradient(135deg, var(--accent-color), var(--highlight-color));
    padding: 25px;
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 20px;
}

.recommendation-value {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 10px 0;
}

.recommendation-range {
    font-size: 1.2rem;
    opacity: 0.9;
}

.factors-list {
    list-style-type: none;
    padding: 0;
}

.factors-list li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.factors-list li:last-child {
    border-bottom: none;
}

.factor-impact {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    margin-left: 10px;
}

.impact-high {
    background-color: #e94560;
}

.impact-medium {
    background-color: #0f3460;
}

.impact-low {
    background-color: #1a1a2e;
}