/* Laboratorio · lab.ilpromptuario.it
   Token: Dark Design System v1 (brand-data.md §2). Registro «Laboratorio»: _LAB/00-METODO.md.
   Regole non derogabili: arancione solo su CTA/evidenze, mai testo bianco sull'arancione,
   --text-muted mai per testo corrente. */

:root {
  --primary-deeper: #0A0F1F;
  --primary-dark: #0F172A;
  --primary: #1E3A8A;
  --surface: #131C36;
  --surface-elevated: #1A2341;
  --border: #273155;
  --border-subtle: #172047;
  --accent: #F98E40;
  --accent-hover: #FFA558;
  --accent-glow: rgba(249, 142, 64, 0.35);
  --accent-alt: #10B981;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --font-heading: 'Poppins', 'Inter', sans-serif;
  --font-body: 'Inter', 'Roboto', sans-serif;
  --radius: 16px;
  --radius-lg: 20px;
  --max: 1080px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  background: radial-gradient(ellipse at top, #172047 0%, var(--primary-dark) 50%, var(--primary-deeper) 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Registro Laboratorio: griglia di punti, sotto tutto */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 10%, rgba(249, 142, 64, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(30, 58, 138, 0.12) 0%, transparent 50%),
    radial-gradient(rgba(241, 245, 249, 0.07) 1px, transparent 1px);
  background-size: auto, auto, 28px 28px;
  pointer-events: none;
  z-index: 0;
}

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

a { color: var(--text-primary); text-decoration-color: var(--border); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.15;
}
h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 900; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800; }
h3 { font-size: 1.2rem; font-weight: 700; }
p { color: var(--text-secondary); }
p strong { color: var(--text-primary); }

.lab-wrap { width: min(var(--max), 100% - 32px); margin-inline: auto; }

/* Testata */
.lab-top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-subtle);
}
.lab-brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.lab-brand svg { width: 36px; height: 36px; flex: none; }
.lab-brand-name { font-family: var(--font-heading); font-weight: 800; font-size: 1rem; color: var(--text-primary); line-height: 1.1; }
.lab-brand-name small {
  display: block; font-family: var(--font-body); font-weight: 600; font-size: 0.7rem;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent);
}
.lab-back { font-size: 0.9rem; color: var(--text-secondary); white-space: nowrap; }

/* Etichette d'officina */
.lab-eyebrow {
  display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 12px;
}
.lab-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 5px 10px; border-radius: 999px; border: 1px solid var(--border);
  color: var(--text-secondary); background: var(--primary-deeper);
}
.lab-tag--prova { border-color: var(--accent); color: var(--accent); }
.lab-tag--costruito { border-color: var(--text-secondary); color: var(--text-primary); }
.lab-tag--arrivo { border-style: dashed; }

/* Hero */
.lab-hero { padding: 64px 0 40px; max-width: 760px; }
.lab-hero p { font-size: 1.15rem; margin-top: 18px; }
.lab-hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--accent), #FFB377); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Sezioni e griglia */
.lab-section { padding: 36px 0; }
.lab-section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.lab-section-head p { max-width: 560px; }
.lab-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }

.lab-card {
  display: flex; flex-direction: column; gap: 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; text-decoration: none; color: inherit;
  transition: transform .15s ease, border-color .15s ease;
}
a.lab-card:hover { transform: translateY(-2px); border-color: var(--text-secondary); }
.lab-card h3 { margin-top: 4px; }
.lab-card p { font-size: 0.95rem; }
.lab-card-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.lab-card-meta { font-size: 0.78rem; color: var(--text-secondary); }
.lab-card-go { margin-top: auto; font-weight: 600; color: var(--text-primary); font-size: 0.95rem; }
.lab-card--arrivo { border-style: dashed; background: transparent; }
.lab-card--arrivo h3, .lab-card--arrivo p { color: var(--text-secondary); }

/* Blocchi di testo */
.lab-prose { max-width: 720px; }
.lab-prose p + p, .lab-prose ul + p, .lab-prose p + ul { margin-top: 14px; }
.lab-prose ul { padding-left: 1.2em; color: var(--text-secondary); }
.lab-prose li + li { margin-top: 6px; }
.lab-prose h2 { margin: 40px 0 14px; }
.lab-prose h3 { margin: 28px 0 10px; }
.lab-prose code { font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-size: 0.9em; background: var(--primary-deeper); border: 1px solid var(--border-subtle); border-radius: 6px; padding: 1px 6px; color: var(--text-primary); }

.lab-note {
  background: var(--primary-deeper); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: var(--radius); padding: 16px 18px; margin: 24px 0;
}
.lab-note p { font-size: 0.95rem; }

.lab-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin: 24px 0; }
.lab-fact { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.lab-fact small { display: block; font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-secondary); font-weight: 700; margin-bottom: 4px; }
.lab-fact strong { color: var(--text-primary); font-family: var(--font-heading); font-size: 1.05rem; }

/* Bottoni: arancione con testo navy, mai bianco */
.lab-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-body); font-weight: 700; font-size: 1rem;
  padding: 12px 20px; border-radius: 12px; border: 1px solid transparent;
  cursor: pointer; text-decoration: none; transition: background .15s ease, border-color .15s ease;
}
.lab-btn--primary { background: var(--accent); color: var(--primary-deeper); box-shadow: 0 8px 24px var(--accent-glow); }
.lab-btn--primary:hover { background: var(--accent-hover); }
.lab-btn--ghost { background: transparent; color: var(--text-primary); border-color: var(--border); }
.lab-btn--ghost:hover { border-color: var(--text-secondary); }
.lab-btn[disabled] { opacity: .5; cursor: not-allowed; box-shadow: none; }

/* Form */
.lab-form { display: grid; gap: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; }
.lab-field label { display: block; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
.lab-field small { display: block; color: var(--text-secondary); font-size: 0.85rem; margin-top: 6px; }
.lab-field input {
  width: 100%; font: inherit; font-size: 1.05rem; color: var(--text-primary);
  background: var(--primary-deeper); border: 1px solid var(--border); border-radius: 12px;
  padding: 12px 14px;
}
.lab-field input::placeholder { color: var(--text-muted); }
.lab-field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 480px) { .lab-field-row { grid-template-columns: 1fr; } }

/* Risultato */
.lab-result { margin-top: 24px; background: var(--surface-elevated); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; }
.lab-result-empty { color: var(--text-secondary); }
.lab-result-big { font-family: var(--font-heading); font-weight: 900; font-size: clamp(2rem, 6vw, 3rem); color: var(--text-primary); letter-spacing: -0.02em; line-height: 1.1; }
.lab-result-big span { color: var(--text-secondary); }
.lab-result-sub { margin-top: 8px; font-size: 1.05rem; }
.lab-result-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.lab-result-copied { font-size: 0.9rem; color: var(--accent-alt); font-weight: 600; min-height: 1.4em; margin-top: 10px; }

/* Schermate */
.lab-shot { margin: 24px 0; }
.lab-shot img { width: 100%; height: auto; display: block; border-radius: var(--radius); border: 1px solid var(--border); }
.lab-shot figcaption { font-size: 0.85rem; color: var(--text-secondary); margin-top: 8px; }

/* Piè di pagina */
.lab-foot { margin-top: 64px; padding: 32px 0 40px; border-top: 1px solid var(--border-subtle); font-size: 0.9rem; color: var(--text-secondary); }
.lab-foot p + p { margin-top: 8px; }
.lab-foot a { color: var(--text-secondary); }
.lab-foot a:hover { color: var(--text-primary); }

/* Filtro indice */
.lab-filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 8px 0 28px; }
.lab-chip {
  font: inherit; font-size: 0.85rem; font-weight: 600; color: var(--text-secondary);
  background: transparent; border: 1px solid var(--border); border-radius: 999px; padding: 7px 14px; cursor: pointer;
}
.lab-chip.on { border-color: var(--accent); color: var(--accent); }
.lab-zero { display: none; color: var(--text-secondary); }

@media (max-width: 640px) {
  .lab-hero { padding: 44px 0 28px; }
  .lab-top { flex-wrap: wrap; }
  .lab-back { font-size: 0.85rem; }
  .lab-form, .lab-result { padding: 18px; }
}