/* Termotecnica di Fanni Emanuele — pagina "sito in costruzione": font, token, base e movimento */

@font-face {
  font-family: "Mona Sans";
  src: url("../fonts/mona-sans-latin.woff2") format("woff2");
  font-weight: 200 900;
  font-stretch: 75% 125%;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Geist Mono";
  src: url("../fonts/geist-mono-latin.woff2") format("woff2");
  font-weight: 400 600;
  font-style: normal;
  font-display: swap;
}

/* ---------- Token ---------- */

:root {
  color-scheme: light;

  /* colori del marchio, campionati dal logo */
  --brand-green: #0b7443;
  --brand-green-deep: #085a34;
  --brand-blue: #1760a8;
  --brand-orange: #f07a20;
  --brand-yellow: #f8c71a;

  --paper: #f3efe6;
  --paper-raised: #fbf9f4;
  --ink: #0f1d2b;
  --ink-soft: #3a4855;
  --muted: #5b6873;
  --line: rgb(15 29 43 / 0.12);
  --grid-line: rgb(15 29 43 / 0.05);

  --panel: #0b1622;
  --panel-edge: #17304a;
  --hud: rgb(214 228 244 / 0.82);
  --hud-dim: rgb(214 228 244 / 0.58);

  --accent: var(--brand-orange);
  --scale-heat: linear-gradient(90deg, #0d0a2b, #2b0b57 18%, #6a176e 36%, #b12a5a 53%, #e8552a 68%, #f99b1c 82%, #fbd044 93%, #fff6c9);
  --scale-cool: linear-gradient(90deg, #070d1f, #0b2a5b 25%, #1760a8 50%, #2aa6d9 72%, #8fe3f2 88%, #f0fdff);

  --font-sans: "Mona Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --text-hero: clamp(2.6rem, 1.1rem + 5.6vw, 6.4rem);
  --text-hero-sub: clamp(1.45rem, 1rem + 1.9vw, 2.55rem);
  --text-lead: clamp(1.04rem, 0.98rem + 0.3vw, 1.2rem);
  --text-label: 0.72rem;

  --gutter: clamp(1rem, 0.4rem + 2.6vw, 3rem);
  --radius-panel: clamp(1.25rem, 0.9rem + 1.2vw, 2rem);
  --radius-pill: 999px;

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 160ms;
  --duration-normal: 320ms;
  --duration-slow: 700ms;
  --duration-reveal: 1000ms;
}

:root[data-season="cool"] {
  --accent: var(--brand-blue);
}

/* ---------- Base ---------- */

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

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

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--paper);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .32 0 0 0 0 .27 0 0 0 0 .2 0 0 0 .09 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--brand-yellow);
  color: var(--ink);
}

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

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: var(--gutter);
  z-index: 100;
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform var(--duration-fast) var(--ease-out-expo);
}

.skip-link:focus-visible {
  transform: none;
}

/* ---------- Pagina ---------- */

.page {
  position: relative;
  isolation: isolate;
  max-width: 90rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
  /* iPhone in orizzontale: il contenuto non finisce sotto notch / Dynamic Island */
  padding-inline: max(var(--gutter), env(safe-area-inset-left)) max(var(--gutter), env(safe-area-inset-right));
}

/* carta millimetrata che sfuma + bagliore caldo/freddo dietro al pannello */
.page::before,
.page::after {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: min(64rem, 125vh);
  z-index: -1;
  pointer-events: none;
}

.page::before {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(120% 80% at 70% 20%, #000 20%, transparent 75%);
  mask-image: radial-gradient(120% 80% at 70% 20%, #000 20%, transparent 75%);
}

.page::after {
  background:
    radial-gradient(38% 42% at 80% 30%, rgb(240 122 32 / 0.13), transparent 70%),
    radial-gradient(30% 36% at 96% 62%, rgb(23 96 168 / 0.08), transparent 70%);
  transition: opacity var(--duration-slow) ease;
}

:root[data-season="cool"] .page::after {
  background:
    radial-gradient(38% 42% at 80% 30%, rgb(23 96 168 / 0.14), transparent 70%),
    radial-gradient(30% 36% at 96% 62%, rgb(42 166 217 / 0.1), transparent 70%);
}


/* ---------- Movimento ---------- */

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    animation: rise var(--duration-reveal) var(--ease-out-expo) both;
    animation-delay: calc(var(--order, 0) * 90ms + 60ms);
  }

  .thermal.reveal {
    animation-name: rise-panel;
    animation-duration: 1200ms;
  }
}

.order-1 { --order: 1; }
.order-2 { --order: 2; }
.order-3 { --order: 3; }
.order-4 { --order: 4; }
.order-5 { --order: 5; }

@keyframes rise {
  from { opacity: 0; transform: translateY(1.25rem); }
}

@keyframes rise-panel {
  from { opacity: 0; transform: translateY(2rem) scale(0.97); }
}

@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;
  }
}