:root {
    --primary-blue: #008ed0;
    --dark-blue: #006da0;
    --white: #ffffff;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e0e0e0;
    --gray-600: #757575;
    --gray-800: #424242;
    --black: #212121;
    --anthracite: #333333;

    --triton-color: #008ed0;
    --triton-lab-color: #e07950;
    --triton-reagents-color: #009b9d;
    --triton-learn-color: #c5a050;
    --triton-pro-color: #43c1eb;

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    --container-width: 1200px;

    --transition-speed: 0.3s;
    --header-height: 120px;
    --mobile-header-height: 60px;
    --page-padding-top: 0px;
}

*, *:before, *:after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    font-size: 16px;
    line-height: 1.6;
}

body {
    font-family: 'Open Sans', sans-serif;
    color: var(--black);
    background: var(--white);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: 0;
}

body:not(.home) {
    padding-top: calc(var(--header-height) + var(--page-padding-top)); 
}

.wrap {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 4px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    position: relative;
}

.button i {
    font-size: 16px;
}

.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mobile-only {
    display: none;
}

@media (max-width: 1050px) {
    .mobile-only {
        display: block;
    }
    
    .desktop-only {
        display: none;
    }
}

@media (max-width: 1200px) {
    .wrap {
        padding: 0 var(--spacing-lg);
    }
}

@media (max-width: 1050px) {
    :root {
        --header-height: var(--mobile-header-height);
        --page-padding-top: 10px;
    }

    body:not(.home) {
        padding-top: 60px; 
    }
}

.go-up-btn {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--primary-blue);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.go-up-btn i {
    font-size: 1.2rem;
}

.go-up-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.go-up-btn:hover {
    background: var(--dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
    .go-up-btn {
        bottom: 30px;
        right: 30px;
        width: 40px;
        height: 40px;
    }

    .go-up-btn i {
        font-size: 1rem;
    }
}