:root { 
    --color-primary-dark: #003667;
    --color-primary-medium: #014C83;
    --color-primary: #1A4975;
    --color-primary-light: #315A81;

    --color-background-white: #fffdfd;
    --color-background-light: #fbfafa;
    --color-text-dark: #1a1a1a;
    --color-text-medium:rgb(60, 60, 60); 
    --color-accent: #3eb5d0; 
    --color-accent-hover: #00bfff; 

    --font-family-primary: 'Atkinson-HP', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    
    --font-size-h1: 48px;
    --font-size-h2: 40px;
    --font-size-h3: 32px;
    --font-size-h4: 24px;
    --font-size-h5: 18px;
    --radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--color-accent) var(--color-background-light);
}

body {
    font-family: var(--font-family-primary); 
    scroll-behavior:smooth;
    line-height: 1.6;
    color: var(--color-text-dark); 
    background: var(--color-background-white); 
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
    position: relative;
}

.links a {
    text-decoration: none;
    text-align: center;
}

::-webkit-scrollbar {
    width: clamp(8px, 1vw, 12px);
    height: clamp(8px, 1vw, 12px);
}

::-webkit-scrollbar-track {
    background: var(--color-background-light);
    border-radius: 50px;
    margin: clamp(2px, 0.5vw, 6px) 0;
}

::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 50px;
    border: clamp(2px, 0.5vw, 3px) solid var(--color-background-light);
    transition: background 0.2s ease, transform 0.2s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-hover);
    transform: scale(1.05);
}

::-webkit-scrollbar-button {
    display: none;
}

html[dark] {
    --color-primary-dark: #9ac9ff;
    --color-primary-medium: #78a8e0;
    --color-primary: #4f7bbd;
    --color-primary-light: #385d8a;

    --color-background-white: #0e0e0e;
    --color-background-light: #1a1a1a;
    --color-text-dark: #f5f5f5;
    --color-text-medium: #ccc;
    --color-accent: #4da3ff;
    --color-accent-hover: #78c7ff;
}   

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 25% 25%, rgba(0, 234, 255, 0.06), transparent 35%),
        radial-gradient(circle at 75% 75%, rgba(111, 0, 255, 0.12), transparent 30%),
        radial-gradient(circle at 50% 50%, rgba(0, 64, 255, 0.15), transparent 40%);
    filter: blur(140px) brightness(1.2);
    animation: neon-gradient 30s ease-in-out infinite alternate;
    z-index: -1;
    pointer-events: none;
}
@keyframes neon-gradient {
    0%   { transform: translate(0,0) scale(1); opacity: 0.85; }
    50%  { transform: translate(20px, -10px) scale(1.03); opacity: 0.95; }
    100% { transform: translate(-10px, 20px) scale(1.02); opacity: 0.9; }
}

#loader {
    position: fixed;
    inset: 0;
    background: var(--color-background-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

html[dark] #loader {
    background: var(--color-background-dark, #0f0f0f);
}

.loader-logo {
    width: 120px;
    height: auto;
    opacity: 0;
    animation: loaderFade 1.4s ease-in-out infinite;
}

@keyframes loaderFade {
    0% { opacity: 0.2; transform: scale(0.96); }
    50% { opacity: 1; transform: scale(1); }
    100% { opacity: 0.2; transform: scale(0.96); }
}

#loader.hidden {
    opacity: 0;
    visibility: hidden;
}