/* ============================================
   BASE
   Reset, html/body defaults, links, images,
   global utility classes (reveal, lang-swapping).
   ============================================ */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

main,
nav,
footer {
    position: relative;
    z-index: 1;
}

a {
    color: var(--blue);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--blue-glow);
}

img {
    max-width: 100%;
    display: block;
}

/* Reveal-on-scroll — applied by IntersectionObserver in scripts/ui.js */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Smooth language swap — applied during i18n.applyLang */
[data-i18n],
[data-i18n-html] {
    transition: opacity 0.15s ease;
}

.lang-swapping [data-i18n],
.lang-swapping [data-i18n-html] {
    opacity: 0.4;
}