/* =========================================================
   QUOTA — Studio Tecnico di Geometri
   Design tokens + componenti base
   ========================================================= */
@import url('https://fonts.googleapis.com/css2?family=Archivo:wdth,wght@62..125,300..900&family=IBM+Plex+Sans:wght@300;400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* ---- Colore ---- */
  --paper:    #F2F1ED;   /* carta tecnica */
  --paper-2:  #E8E6E0;   /* carta ombra */
  --paper-3:  #DCD9D1;
  --ink:      #12161C;   /* inchiostro */
  --ink-2:    #262C35;
  --night:    #0D1116;   /* sezioni scure */
  --night-2:  #161C24;
  --muted:    #6A6F77;
  --muted-d:  #8D939C;   /* testo secondario su scuro */
  --line:     rgba(18,22,28,.14);
  --line-d:   rgba(242,241,237,.12);

  --signal:   oklch(0.67 0.19 42);   /* arancio picchetto — CTA */
  --signal-h: oklch(0.61 0.19 42);
  --survey:   oklch(0.67 0.11 235);  /* azzurro rilievo — dati, linee */
  --ok:       oklch(0.67 0.13 150);

  /* ---- Tipografia ---- */
  --f-display: 'Archivo', 'Arial Narrow', sans-serif;
  --f-body:    'IBM Plex Sans', 'Helvetica Neue', Helvetica, sans-serif;
  --f-mono:    'IBM Plex Mono', ui-monospace, monospace;

  --t-mega: clamp(3.2rem, 11vw, 9.5rem);
  --t-h1:   clamp(2.4rem, 7vw, 5.6rem);
  --t-h2:   clamp(2rem, 5vw, 3.8rem);
  --t-h3:   clamp(1.35rem, 2.4vw, 1.75rem);
  --t-lead: clamp(1.05rem, 1.6vw, 1.3rem);
  --t-body: 1rem;
  --t-small:.875rem;
  --t-mono: .75rem;

  /* ---- Spazio (modulo 8) ---- */
  --s-1: 4px;  --s-2: 8px;  --s-3: 16px; --s-4: 24px;
  --s-5: 32px; --s-6: 48px; --s-7: 64px; --s-8: 96px; --s-9: 128px;
  --gutter: clamp(20px, 4vw, 56px);
  --section-y: clamp(80px, 12vw, 160px);
  --maxw: 1320px;

  /* ---- Forma ---- */
  --radius: 0px;          /* contesto squadrato: angoli vivi */
  --bw: 1px;

  /* ---- Movimento ---- */
  --ease-out: cubic-bezier(.16,1,.3,1);
  --ease-io:  cubic-bezier(.65,0,.35,1);
  --dur-1: 160ms; --dur-2: 320ms; --dur-3: 700ms; --dur-4: 1200ms;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: var(--t-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }

/* ---- Tipografia ---- */
.display, h1, h2, h3 {
  font-family: var(--f-display);
  font-stretch: 112%;
  font-weight: 800;
  line-height: .95;
  letter-spacing: -.01em;
  margin: 0;
  text-wrap: balance;
}
.t-mega { font-size: var(--t-mega); font-stretch: 125%; font-weight: 900; text-transform: uppercase; letter-spacing: -.02em; }
.t-h1 { font-size: var(--t-h1); text-transform: uppercase; }
.t-h2 { font-size: var(--t-h2); text-transform: uppercase; }
.t-h3 { font-size: var(--t-h3); font-stretch: 100%; font-weight: 700; line-height: 1.15; }
.t-lead { font-size: var(--t-lead); line-height: 1.5; font-weight: 300; text-wrap: pretty; }
.t-small { font-size: var(--t-small); }
p { text-wrap: pretty; margin: 0; }

.mono, .label {
  font-family: var(--f-mono);
  font-size: var(--t-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 500;
}
.label { display: inline-flex; align-items: center; gap: 10px; color: var(--muted); }
.label::before { content: ""; width: 18px; height: 1px; background: currentColor; }
.label.signal { color: var(--signal); }
.accent { color: var(--signal); }

/* ---- Bottoni ---- */
.btn {
  --bg: var(--ink); --fg: var(--paper);
  display: inline-flex; align-items: center; justify-content: space-between; gap: 18px;
  min-height: 52px; padding: 0 22px;
  background: var(--bg); color: var(--fg);
  border: var(--bw) solid var(--bg);
  border-radius: var(--radius);
  font-family: var(--f-mono); font-size: .8rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase; text-decoration: none;
  cursor: pointer; position: relative; overflow: hidden; isolation: isolate;
  transition: color var(--dur-2) var(--ease-out), border-color var(--dur-2);
}
.btn::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--hover, var(--signal));
  transform: scaleX(0); transform-origin: right;
  transition: transform var(--dur-3) var(--ease-out);
}
.btn:hover::after { transform: scaleX(1); transform-origin: left; }
.btn:hover { border-color: var(--hover, var(--signal)); color: var(--hover-fg, #fff); }
.btn .arr { display: inline-block; width: 14px; height: 14px; position: relative; transition: transform var(--dur-2) var(--ease-out); }
.btn .arr::before { content:""; position:absolute; left:0; right:0; top:50%; height:1.5px; background:currentColor; }
.btn .arr::after { content:""; position:absolute; right:0; top:50%; width:8px; height:8px; border-top:1.5px solid currentColor; border-right:1.5px solid currentColor; transform: translateY(-50%) rotate(45deg); }
.btn:hover .arr { transform: translateX(4px); }

.btn-signal { --bg: var(--signal); --fg: #fff; --hover: var(--ink); }
.btn-ghost  { --bg: transparent; --fg: var(--ink); border-color: var(--ink); --hover: var(--ink); --hover-fg: var(--paper); }
.on-dark .btn-ghost, .btn-ghost.inv { --fg: var(--paper); border-color: rgba(242,241,237,.5); --hover: var(--paper); --hover-fg: var(--ink); }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: .72rem; }
.btn:focus-visible, .chip:focus-visible, .field input:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

/* ---- Chip / tag ---- */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 0 16px;
  border: 1px solid var(--line); background: transparent; color: inherit;
  font-family: var(--f-body); font-size: .9rem; cursor: pointer;
  transition: all var(--dur-2) var(--ease-out);
}
.chip::before { content:""; width:8px; height:8px; border:1px solid currentColor; transition: background var(--dur-2); }
.chip:hover { border-color: var(--ink); }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chip[aria-pressed="true"]::before { background: var(--signal); border-color: var(--signal); }
.tag { font-family: var(--f-mono); font-size: .68rem; letter-spacing: .06em; text-transform: uppercase; padding: 4px 8px; border: 1px solid var(--line); color: var(--muted); }

/* ---- Campi ---- */
.field { display: grid; gap: 6px; }
.field label { font-family: var(--f-mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.field input, .field select, .field textarea {
  width: 100%; min-height: 52px; padding: 12px 0;
  font: inherit; font-size: 1.05rem; color: inherit;
  background: transparent; border: 0; border-bottom: 1px solid var(--ink);
  border-radius: 0; outline: none; transition: border-color var(--dur-2);
}
.field textarea { min-height: 96px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-bottom: 2px solid var(--signal); }

/* ---- Quota (linea di misura) ---- */
.dim { position: relative; height: 18px; color: var(--signal); }
.dim .dim-line { position: absolute; left: 0; top: 50%; height: 1px; width: 100%; background: currentColor; transform-origin: left; }
.dim::before, .dim::after { content: ""; position: absolute; top: 2px; width: 1px; height: 14px; background: currentColor; }
.dim::before { left: 0; } .dim::after { right: 0; }
.dim .dim-val { position: absolute; left: 50%; top: -14px; transform: translateX(-50%); font-family: var(--f-mono); font-size: .68rem; background: inherit; padding: 0 6px; letter-spacing: .06em; }

/* ---- Placeholder immagine ---- */
.ph {
  position: relative; overflow: hidden;
  background:
    repeating-linear-gradient(135deg, transparent 0 10px, rgba(18,22,28,.06) 10px 11px),
    var(--paper-2);
  display: grid; place-items: center;
}
.ph > span { font-family: var(--f-mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); background: var(--paper); padding: 6px 10px; border: 1px solid var(--line); position: relative; z-index: 1; }
.on-dark .ph, .ph.dark {
  background: repeating-linear-gradient(135deg, transparent 0 10px, rgba(242,241,237,.05) 10px 11px), var(--night-2);
}
.on-dark .ph > span, .ph.dark > span { background: var(--night); color: var(--muted-d); border-color: var(--line-d); }

/* ---- Griglia tecnica ---- */
.grid-bg {
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.on-dark { background: var(--night); color: var(--paper); }
.on-dark .label { color: var(--muted-d); }

/* Logo */
.logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-mark { width: 30px; height: 30px; border: 2px solid currentColor; position: relative; flex: none; }
.logo-mark::before { content:""; position:absolute; left:50%; top:-6px; bottom:-6px; width:2px; margin-left:-1px; background: currentColor; }
.logo-mark::after  { content:""; position:absolute; top:50%; left:-6px; right:-6px; height:2px; margin-top:-1px; background: currentColor; }
.logo-mark i { position:absolute; width:8px; height:8px; background: var(--signal); left:50%; top:50%; transform: translate(-50%,-50%); z-index:1; }
.logo-word { font-family: var(--f-display); font-stretch: 125%; font-weight: 900; font-size: 1.25rem; letter-spacing: .02em; line-height: 1; }
.logo-sub { display:block; font-family: var(--f-mono); font-size: .6rem; letter-spacing: .14em; font-weight: 500; opacity: .65; margin-top: 3px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}