/* base.css, reset, global typography, and the universal header/footer chrome
   injected by js/site/partials.js. Reads only tokens.css variables.
   Loaded after tokens.css, before components.css and pages.css. */

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;              /* header · main (flex-grows) · footer */
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text);
    font-family: var(--font-sans);
    font-size: var(--fs-300);
    line-height: var(--lh-normal);
    -webkit-font-smoothing: antialiased;
}

main { flex: 1 0 auto; }

img, video { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-strong); }

/* --- Headings --- */
h1, h2, h3, h4 { line-height: var(--lh-tight); color: var(--text-strong); font-weight: 800; }
h1 { font-size: var(--fs-700); }
h2 { font-size: var(--fs-600); }
h3 { font-size: var(--fs-500); }
h4 { font-size: var(--fs-400); }
p { margin: 0 0 var(--space-4); }
strong { color: var(--accent); }
hr { border: 0; border-top: 1px solid var(--border); margin: var(--space-5) 0; }

/* Accessible skip target + focus visibility */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* <picture> is only ever a wrapper for choosing a webp source; it must not become
   a layout box of its own, or the img inside stops inheriting the flex/grid
   sizing its class expects. */
picture { display: contents; }
/* ...but display:contents promotes <source> to a real child of that flex/grid
   container. <source> has no UA display:none, so as a grid item it gets
   blockified and eats a cell, pushing the image into the next row. It must
   never generate a box. */
picture > source { display: none; }

/* Shared page content column */
.page {
    width: 100%;
    max-width: var(--content-max);
    margin: 0 auto;
    padding: var(--space-7) var(--content-pad);
}

/* =========================================================================
   SITE HEADER  (markup injected by partials.js into #site-header)
   ========================================================================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: var(--surface-0);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    /* Same outer padding as .site-footer so the two line up exactly. */
    padding: 0 var(--content-pad);
}
.site-header__inner {
    width: 100%;
    height: 100%;
    /* Mirrors .site-footer__inner exactly (padding lives on .site-header), so the
       brand lines up with the footer brand and the nav with the footer copy. */
    max-width: var(--content-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

/* Brand (name + role tagline) */
.site-brand { display: flex; align-items: baseline; gap: var(--space-3); color: var(--text-strong); }
.site-brand:hover { color: var(--text-strong); }
.site-brand__name { font-size: 1.4rem; font-weight: 800; letter-spacing: 0.5px; }
.site-brand__role { font-size: 0.85rem; color: var(--accent); font-weight: 600; white-space: nowrap; }

/* Nav */
.site-nav { margin-left: auto; display: flex; align-items: center; gap: var(--space-5); }
.site-nav a { color: var(--text); font-weight: 600; font-size: 1.05rem; transition: color var(--ease); }
.site-nav a:hover { color: var(--accent); }
.site-nav .is-active > a,
.site-nav a.is-active { color: var(--accent); }

/* Projects dropdown (progressively enhanced by partials.js when projects.json
   exists; until then the trigger is just a plain link to projects.html). */
.nav-projects { position: relative; }
.nav-projects__menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    min-width: 210px;
    background: var(--surface-solid);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    box-shadow: var(--shadow-pop);
    padding: var(--space-2);
    display: none;
    flex-direction: column;
    gap: 2px;
}
/* Transparent bridge across the 10px gap so the menu doesn't close while the
   pointer travels from the trigger down to it. */
.nav-projects__menu::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: -10px;
    height: 10px;
}
.nav-projects:hover .nav-projects__menu,
.nav-projects:focus-within .nav-projects__menu { display: flex; }
/* Caret is mobile-only; on desktop hover opens the menu. */
.nav-projects__toggle {
    display: none;
    background: none; border: 0; cursor: pointer;
    color: var(--text); font-size: 1rem; line-height: 1;
    padding: var(--space-2) var(--space-3);
    transition: color var(--ease), transform var(--ease);
}
.nav-projects__toggle:hover { color: var(--accent); }
.nav-projects__group {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    padding: var(--space-3) var(--space-3) var(--space-1);
}
.nav-projects__menu a {
    font-size: 0.95rem;
    font-weight: 600;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    color: var(--text);
}
.nav-projects__menu a:hover { background: var(--surface-2); color: var(--accent); }

/* Hamburger, hidden on desktop */
.nav-toggle {
    display: none;
    margin-left: auto;
    background: none;
    border: 0;
    color: var(--text-strong);
    font-size: 1.8rem;
    line-height: 1;
    cursor: pointer;
}

/* =========================================================================
   SITE FOOTER  (markup injected by partials.js into #site-footer)
   ========================================================================= */
.site-footer {
    flex-shrink: 0;
    background: var(--surface-0);
    border-top: 1px solid var(--border);
    padding: var(--space-6) var(--content-pad);
}
.site-footer__inner {
    max-width: var(--content-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
}
.site-footer__brand { font-weight: 800; font-size: 1.2rem; color: var(--text-strong); }
.site-footer__socials { display: flex; gap: var(--space-4); align-items: center; }
.site-footer__socials a { width: 64px; height: 64px; display: block; transition: transform var(--ease), opacity var(--ease); }
.site-footer__socials a:hover { transform: scale(1.15); opacity: 0.85; }
.site-footer__socials img { width: 100%; height: 100%; object-fit: contain; }
.site-footer__copy { color: var(--text-muted); font-size: 0.9rem; }

/* =========================================================================
   MOBILE NAV
   ========================================================================= */
@media (max-width: 760px) {
    .site-brand__role { display: none; }
    .nav-toggle { display: block; }
    .site-nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--surface-solid);
        border-bottom: 1px solid var(--border);
        padding: var(--space-3);
        transform: translateY(-12px);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--ease), transform var(--ease);
    }
    .site-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .site-nav > a,
    .nav-projects > a {
        display: block;
        padding: var(--space-3) var(--space-4);
        border-radius: var(--radius-sm);
    }
    .site-nav > a:hover,
    .nav-projects > a:hover { background: var(--surface-2); }
    /* On mobile the submenu is a real dropdown: collapsed until the caret is
       tapped (the Projects label itself still links through to the catalogue). */
    .nav-projects { display: flex; flex-wrap: wrap; align-items: center; }
    .nav-projects > a { flex: 1; }
    .nav-projects__toggle { display: block; }
    .nav-projects__menu {
        position: static;
        display: none;
        width: 100%;
        border: 0;
        box-shadow: none;
        background: transparent;
        padding-left: var(--space-4);
    }
    .nav-projects.is-open .nav-projects__menu { display: flex; }
    .nav-projects.is-open .nav-projects__toggle { transform: rotate(180deg); }
}