/* MichelangeloLab site base: the mechanics every page shares (Framer-like primitives).
   Load order: fonts/fonts.css, motion/scrollcraft.css, base/base.css, style.css.
   Brand look lives in style.css: override the tokens below, never these rules' structure.
   Tokens bridge to the ScrollCraft roles (--sc-*) so one palette themes both. */

/* ------------------------------------------------------------- tokens -- */
:root {
  --canvas: var(--sc-canvas, #f4f1ea);
  --surface: var(--sc-surface, #ebe6db);
  --ink: var(--sc-ink, #1c1a17);
  --ink-soft: var(--sc-ink-soft, #5d574e);
  --accent: var(--sc-accent, #1f4a3a);
  --accent-ink: var(--sc-accent-ink, #f4f1ea);
  --line: color-mix(in srgb, var(--ink) 14%, transparent);
  --font-head: var(--font-display, Georgia, serif);
  --font-text: var(--font-body, system-ui, sans-serif);

  /* fluid type ramp: 390px -> 1440px */
  --t-xs: clamp(0.78rem, 0.76rem + 0.1vw, 0.84rem);
  --t-sm: clamp(0.9rem, 0.87rem + 0.12vw, 0.98rem);
  --t-base: clamp(1.02rem, 0.98rem + 0.2vw, 1.15rem);
  --t-lg: clamp(1.2rem, 1.1rem + 0.45vw, 1.5rem);
  --t-xl: clamp(1.5rem, 1.3rem + 0.9vw, 2.2rem);
  --t-2xl: clamp(2rem, 1.6rem + 1.7vw, 3.4rem);
  --t-3xl: clamp(2.5rem, 1.8rem + 3vw, 5rem);
  --t-4xl: clamp(2.9rem, 1.9rem + 4.6vw, 7rem);

  /* 4px spacing scale */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px; --s-6: 32px;
  --s-7: 48px; --s-8: 64px; --s-9: 96px; --s-10: 128px; --s-11: 176px;
  --section: clamp(64px, 6vw + 40px, 160px);
  --gutter: clamp(20px, 4vw, 56px);
  --max: 1320px;
  --measure: 62ch;

  --radius: 14px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --shadow-1: 0 1px 2px color-mix(in srgb, var(--ink) 8%, transparent), 0 4px 12px -4px color-mix(in srgb, var(--ink) 10%, transparent);
  --shadow-2: 0 2px 4px color-mix(in srgb, var(--ink) 8%, transparent), 0 18px 40px -16px color-mix(in srgb, var(--ink) 22%, transparent);
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --header-h: 72px;
}

/* -------------------------------------------------------------- reset -- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0; min-height: 100svh; background: var(--canvas); color: var(--ink);
  font-family: var(--font-text); font-size: var(--t-base); line-height: 1.6;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility;
  overflow-x: clip;
}
h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl, dd { margin: 0; }
ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }
img, picture, svg, video { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
:where(h1, h2, h3, h4) { font-family: var(--font-head); font-weight: 550; line-height: 1.04; letter-spacing: -0.02em; text-wrap: balance; overflow-wrap: break-word; hyphens: manual; }
:where(p, li, figcaption, blockquote) { text-wrap: pretty; overflow-wrap: break-word; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
[hidden] { display: none !important; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: fixed; left: var(--s-4); top: var(--s-4); z-index: 100; padding: var(--s-3) var(--s-4); background: var(--ink); color: var(--canvas); border-radius: var(--radius-sm); transform: translateY(-160%); transition: transform 0.2s var(--ease-out); }
.skip-link:focus-visible { transform: none; }

/* ----------------------------------------------------------- typography -- */
.t-display { font-family: var(--font-head); font-size: var(--t-4xl); line-height: 0.98; letter-spacing: -0.035em; }
.t-h1 { font-size: var(--t-3xl); line-height: 1.02; letter-spacing: -0.03em; }
.t-h2 { font-size: var(--t-2xl); line-height: 1.06; letter-spacing: -0.025em; }
.t-h3 { font-size: var(--t-xl); line-height: 1.15; letter-spacing: -0.015em; }
.t-lead { font-size: var(--t-lg); line-height: 1.5; color: var(--ink-soft); max-width: 42ch; }
.t-body { font-size: var(--t-base); max-width: var(--measure); }
.t-small { font-size: var(--t-sm); color: var(--ink-soft); }
.t-label { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); }
.t-soft { color: var(--ink-soft); }
.t-accent { color: var(--accent); }
.prose > * + * { margin-top: 1em; }
.prose { max-width: var(--measure); }
@media (max-width: 700px) {
  .t-display { font-size: var(--t-3xl); }
  .t-h1 { font-size: var(--t-2xl); }
}

/* --------------------------------------------------------------- layout -- */
.container { width: min(100% - 2 * var(--gutter), var(--max)); margin-inline: auto; }
.container--narrow { --max: 920px; }
.container--wide { --max: 1560px; }
.bleed { width: 100%; }
.section { padding-block: var(--section); }
.section--tight { padding-block: calc(var(--section) * 0.55); }
.section--flush-top { padding-top: 0; }
.section--surface { background: var(--surface); }
.section--invert { background: var(--ink); color: var(--canvas); --ink-soft: color-mix(in srgb, var(--canvas) 72%, var(--ink)); --line: color-mix(in srgb, var(--canvas) 18%, transparent); }
.section--accent { background: var(--accent); color: var(--accent-ink); --ink-soft: color-mix(in srgb, var(--accent-ink) 75%, var(--accent)); --line: color-mix(in srgb, var(--accent-ink) 22%, transparent); }

/* 12-column grid. Children set --span (desktop) and --span-md (tablet); phones stack. */
.grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap, var(--s-6)); row-gap: var(--row-gap, var(--s-7)); align-items: var(--align, start); }
.grid > * { grid-column: span var(--span, 12); min-width: 0; }
.grid > [data-start] { grid-column: var(--start) / span var(--span, 12); }
@media (max-width: 1024px) { .grid > * { grid-column: span var(--span-md, 12); } .grid > [data-start] { grid-column: span var(--span-md, 12); } }
@media (max-width: 700px) { .grid { row-gap: var(--s-6); } .grid > *, .grid > [data-start] { grid-column: 1 / -1; } .grid > [data-order-sm] { order: var(--order-sm); } }

.stack { display: flex; flex-direction: column; gap: var(--gap, var(--s-5)); }
.stack--tight { --gap: var(--s-3); }
.stack--loose { --gap: var(--s-7); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--gap, var(--s-4)); }
.split { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: var(--s-6); }
.rule { height: 1px; border: 0; background: var(--line); margin: 0; }

/* ---------------------------------------------------------------- media -- */
/* <figure class="frame" style="--ratio: 4/5"><img ...></figure> : any image, cropped, never distorted. */
.frame { position: relative; overflow: hidden; aspect-ratio: var(--ratio, 4 / 3); border-radius: var(--frame-radius, var(--radius)); background: var(--surface); isolation: isolate; }
.frame > img, .frame > picture > img, .frame > svg { position: absolute; inset: 0; width: 100%; height: 100%; max-width: none; object-fit: cover; object-position: var(--focus, 50% 50%); }
.frame--zoom > img { transition: transform 0.9s var(--ease-out); }
@media (hover: hover) and (pointer: fine) { .frame--zoom:hover > img { transform: scale(1.04); } }
.caption { margin-top: var(--s-3); font-size: var(--t-sm); color: var(--ink-soft); }
@media (max-width: 700px) { .frame { aspect-ratio: var(--ratio-sm, var(--ratio, 4 / 3)); } }

/* -------------------------------------------------------------- buttons -- */
.btn {
  --btn-bg: var(--accent); --btn-ink: var(--accent-ink);
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  min-height: 48px; padding: 0 var(--s-5); border-radius: var(--btn-radius, 6px);
  background: var(--btn-bg); color: var(--btn-ink); border: 1px solid var(--btn-bg);
  font-family: var(--font-text); font-size: var(--t-sm); font-weight: 500; letter-spacing: 0.01em; line-height: 1; white-space: nowrap; text-decoration: none;
  transition: background-color 0.16s var(--ease-out), color 0.16s var(--ease-out), border-color 0.16s var(--ease-out), transform 0.12s var(--ease-out), box-shadow 0.2s var(--ease-out);
}
.btn--ghost { --btn-bg: transparent; --btn-ink: currentColor; border-color: color-mix(in srgb, currentColor 35%, transparent); }
.btn--light { --btn-bg: var(--canvas); --btn-ink: var(--ink); }
.btn--lg { min-height: 56px; padding: 0 var(--s-6); font-size: var(--t-base); }
.btn svg { width: 1em; height: 1em; transition: transform 0.18s var(--ease-out); }
@media (hover: hover) and (pointer: fine) {
  .btn:hover { box-shadow: var(--shadow-1); filter: brightness(1.06); }
  .btn--ghost:hover { border-color: currentColor; filter: none; }
  .btn:hover svg { transform: translateX(3px); }
}
.btn:active { transform: scale(0.97); }
.link { text-decoration: underline; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); transition: text-decoration-color 0.16s var(--ease-out); }
.link:hover { text-decoration-color: currentColor; }

/* --------------------------------------------------------------- header -- */
/* <header class="site-header" data-header> <div class="container site-header__inner"> brand, <nav class="site-nav"> , actions, <button class="menu-toggle" data-menu-toggle aria-controls="menu" aria-expanded="false"> */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--canvas); box-shadow: 0 1px 0 var(--line); transition: background-color 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out), transform 0.35s var(--ease-out); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--s-5); min-height: var(--header-h); }
.site-header.is-scrolled { background: color-mix(in srgb, var(--canvas) 86%, transparent); -webkit-backdrop-filter: saturate(1.4) blur(14px); backdrop-filter: saturate(1.4) blur(14px); box-shadow: 0 1px 0 var(--line); }
.site-header.is-hidden { transform: translateY(-100%); }
.brand { display: inline-flex; flex-direction: column; text-decoration: none; line-height: 1.1; }
.site-nav ul { display: flex; gap: clamp(var(--s-4), 2vw, var(--s-6)); list-style: none; margin: 0; padding: 0; }
.site-nav a { position: relative; text-decoration: none; font-size: var(--t-sm); color: var(--ink-soft); padding-block: var(--s-2); transition: color 0.16s var(--ease-out); }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform 0.3s var(--ease-out); }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav a:hover::after, .site-nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.menu-toggle { display: none; min-height: 44px; padding: 0 var(--s-4); border: 1px solid var(--line); border-radius: 6px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; }

/* mobile menu: <div class="mobile-menu" id="menu" data-menu hidden> <nav> links </nav> </div> */
.mobile-menu { position: fixed; inset: 0; z-index: 60; display: flex; flex-direction: column; justify-content: center; padding: calc(var(--header-h) + var(--s-6)) var(--gutter) var(--s-8); background: var(--canvas); }
.mobile-menu ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--s-3); }
.mobile-menu a { font-family: var(--font-head); font-size: var(--t-2xl); line-height: 1.15; text-decoration: none; letter-spacing: -0.02em; }
.mobile-menu a[aria-current="page"] { color: var(--accent); }
.mobile-menu .menu-close { position: absolute; top: var(--s-4); right: var(--gutter); }
.mobile-menu:not([hidden]) li { animation: base-rise 0.5s var(--ease-out) both; animation-delay: calc(var(--i, 0) * 45ms + 60ms); }
body.menu-open { overflow: hidden; }
@media (max-width: 900px) {
  .site-nav, .site-header__actions .btn { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; }
}

/* ------------------------------------------------------------ accordion -- */
/* <details class="accordion" name="faq"><summary>Domanda</summary><div class="accordion__body">Risposta</div></details> */
.accordion { border-top: 1px solid var(--line); }
.accordion:last-of-type { border-bottom: 1px solid var(--line); }
.accordion > summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: var(--s-5); padding: var(--s-5) 0; cursor: pointer; font-family: var(--font-head); font-size: var(--t-lg); line-height: 1.3; }
.accordion > summary::-webkit-details-marker { display: none; }
.accordion > summary::after { content: ""; flex: none; width: 14px; height: 14px; background: linear-gradient(currentColor 0 0) center / 100% 1.5px no-repeat, linear-gradient(currentColor 0 0) center / 1.5px 100% no-repeat; transition: transform 0.3s var(--ease-out); }
.accordion[open] > summary::after { transform: rotate(45deg); }
.accordion__body { padding: 0 0 var(--s-5); max-width: var(--measure); color: var(--ink-soft); }
.accordion[open] .accordion__body { animation: base-rise 0.4s var(--ease-out) both; }

/* --------------------------------------------------------------- ticker -- */
/* <div class="ticker" data-ticker><div class="ticker__track"> items </div></div>  (JS duplicates the track) */
.ticker { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.ticker__rail { display: flex; width: max-content; animation: base-ticker var(--ticker-speed, 40s) linear infinite; }
.ticker__track { display: flex; gap: var(--s-7); padding-right: var(--s-7); flex: none; }
.ticker:hover .ticker__rail { animation-play-state: paused; }

/* ----------------------------------------------------------------- tabs -- */
/* <div class="tabs" data-tabs><div role="tablist"> <button role="tab" aria-controls="p1" aria-selected="true"> </div><div role="tabpanel" id="p1"> */
.tabs [role="tablist"] { display: flex; gap: var(--s-2); flex-wrap: wrap; border-bottom: 1px solid var(--line); }
.tabs [role="tab"] { min-height: 44px; padding: 0 var(--s-4); color: var(--ink-soft); border-bottom: 1px solid transparent; margin-bottom: -1px; transition: color 0.16s var(--ease-out), border-color 0.16s var(--ease-out); }
.tabs [role="tab"][aria-selected="true"] { color: var(--ink); border-color: var(--ink); }
.tabs [role="tabpanel"] { padding-top: var(--s-6); }
.tabs [role="tabpanel"]:not([hidden]) { animation: base-rise 0.4s var(--ease-out) both; }

/* ------------------------------------------------------------- lightbox -- */
/* <a href="assets/photos/x.jpg" data-lightbox><img ...></a>  (JS opens it in a <dialog>) */
.lightbox { padding: 0; border: 0; max-width: min(92vw, 1400px); max-height: 90vh; background: transparent; }
.lightbox::backdrop { background: color-mix(in srgb, var(--ink) 82%, transparent); }
.lightbox img { max-height: 86vh; width: auto; border-radius: var(--radius-sm); }
.lightbox button { position: fixed; top: var(--s-4); right: var(--s-4); min-height: 44px; padding: 0 var(--s-4); border-radius: var(--radius-pill); background: var(--canvas); color: var(--ink); }

/* --------------------------------------------------------------- footer -- */
.site-footer { padding-block: var(--s-9) var(--s-6); }
.site-footer a { text-decoration: none; color: var(--ink-soft); transition: color 0.16s var(--ease-out); }
.site-footer a:hover { color: var(--ink); }

/* ----------------------------------------------------- page transitions -- */
/* Same-origin page changes cross-fade where the browser supports it (no JS). */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: base-fade-out 0.22s var(--ease-out) both; }
::view-transition-new(root) { animation: base-fade-in 0.38s var(--ease-out) both; }

/* ------------------------------------------------------------- keyframes -- */
@keyframes base-rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes base-fade-out { to { opacity: 0; } }
@keyframes base-fade-in { from { opacity: 0; } }
@keyframes base-ticker { to { transform: translateX(-50%); } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .ticker__rail { animation: none; flex-wrap: wrap; }
  ::view-transition-old(root), ::view-transition-new(root) { animation: none; }
}
