/* ============================================================================
   leonardopedron.it — design system (redesign 2026)
   Tema "modello relazionale": editoriale, strutturato come uno schema.
   Light-first, dark come inversione fedele. Motion solo funzionale.
   Vedi docs/DESIGN.md. Un solo file, nessun build step.

   Rollout completato: tutte le pagine (home, servizi, blog, 404) usano questo
   file. I vecchi css/styles.css, css/services.css, css/aos.css, css/fa-icons.css
   e i relativi JS sono stati rimossi.
   ============================================================================ */

/* ------------------------------------------------------------------ 1. FONTS */
/* Self-hosted, subset latin + latin-ext (latin-ext lazy via unicode-range). */

@font-face{font-family:'Spectral';font-style:normal;font-weight:400;font-display:swap;src:url('/fonts/spectral-400-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Spectral';font-style:normal;font-weight:400;font-display:swap;src:url('/fonts/spectral-400-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Spectral';font-style:normal;font-weight:500;font-display:swap;src:url('/fonts/spectral-500-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Spectral';font-style:normal;font-weight:500;font-display:swap;src:url('/fonts/spectral-500-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Spectral';font-style:normal;font-weight:600;font-display:swap;src:url('/fonts/spectral-600-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Spectral';font-style:normal;font-weight:600;font-display:swap;src:url('/fonts/spectral-600-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url('/fonts/inter-400-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;src:url('/fonts/inter-400-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url('/fonts/inter-600-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;src:url('/fonts/inter-600-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Fira Code';font-style:normal;font-weight:400;font-display:swap;src:url('/fonts/firacode-400-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Fira Code';font-style:normal;font-weight:400;font-display:swap;src:url('/fonts/firacode-400-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Fira Code';font-style:normal;font-weight:500;font-display:swap;src:url('/fonts/firacode-500-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Fira Code';font-style:normal;font-weight:500;font-display:swap;src:url('/fonts/firacode-500-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}

/* ----------------------------------------------------------------- 2. TOKENS */

:root{
  color-scheme: light;

  --paper:      #FBFAF7;
  --paper-2:    #F2EEE6;
  --paper-3:    #E9E4D8;
  --ink:        #1B2230;
  --ink-2:      #565F6E;
  --ink-3:      #8A8F98;
  --rule:       #DED9CD;
  --rule-2:     #C9C2B2;
  --accent:     #0B5F54;
  --accent-2:   #08463D;
  --accent-wash:rgba(11,95,84,.10);
  --danger:     #A23A2A;
  --code-bg:    #14181F;
  --code-ink:   #C9D1D9;
  --selection:  rgba(11,95,84,.16);
  --nav-bg:     rgba(251,250,247,.86);

  --f-display: 'Spectral', Georgia, 'Times New Roman', serif;
  --f-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --f-mono:    'Fira Code', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;

  --fs-hero: clamp(2.6rem, 2rem + 3vw, 4.4rem);
  --fs-h1:   clamp(2rem, 1.6rem + 1.8vw, 2.9rem);
  --fs-h2:   clamp(1.45rem, 1.2rem + 1vw, 1.95rem);
  --fs-h3:   1.2rem;
  --fs-lead: 1.15rem;
  --fs-body: 1rem;
  --fs-sm:   0.875rem;
  --fs-xs:   0.78rem;

  --wrap: 1120px;
  --prose: 680px;
  --gutter: clamp(1.25rem, 5vw, 2rem);
  --section-y: clamp(2.75rem, 6vw, 4.5rem);
  --marker-col: 150px;
  --r: 4px;

  --t-fast: 140ms;
  --t-base: 200ms;
  --ease: cubic-bezier(.2,.6,.2,1);
}

@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme: dark;
    --paper:      #12161D;
    --paper-2:    #171C25;
    --paper-3:    #1E242F;
    --ink:        #E9E7E1;
    --ink-2:      #9AA3AF;
    --ink-3:      #6B7280;
    --rule:       #2A313C;
    --rule-2:     #3A424F;
    --accent:     #3EB6A3;
    --accent-2:   #5BCBBA;
    --accent-wash:rgba(62,182,163,.12);
    --danger:     #E0715C;
    --code-bg:    #0C0F14;
    --code-ink:   #C9D1D9;
    --selection:  rgba(62,182,163,.20);
    --nav-bg:     rgba(18,22,29,.86);
  }
}

:root[data-theme="dark"]{
  color-scheme: dark;
  --paper:      #12161D;
  --paper-2:    #171C25;
  --paper-3:    #1E242F;
  --ink:        #E9E7E1;
  --ink-2:      #9AA3AF;
  --ink-3:      #6B7280;
  --rule:       #2A313C;
  --rule-2:     #3A424F;
  --accent:     #3EB6A3;
  --accent-2:   #5BCBBA;
  --accent-wash:rgba(62,182,163,.12);
  --danger:     #E0715C;
  --code-bg:    #0C0F14;
  --code-ink:   #C9D1D9;
  --selection:  rgba(62,182,163,.20);
  --nav-bg:     rgba(18,22,29,.86);
}
:root[data-theme="light"]{ color-scheme: light; --nav-bg: rgba(251,250,247,.86); }

/* ------------------------------------------------------------------ 3. RESET */

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

html{
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.25rem;   /* fixed nav (64px) + air — keeps #deep-links, :target and keyboard jumps clear of the navbar */
  scrollbar-gutter: stable;
  overflow-x: clip;   /* clip, not hidden — hidden would make <html> a scroll container */
}

body{
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: clip;
  transition: background var(--t-base) linear, color var(--t-base) linear;
}

::selection{ background: var(--selection); }

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

a{ color: var(--accent); text-decoration: none; }

button,input,select,textarea{ font: inherit; color: inherit; }
button{ background: none; border: 0; cursor: pointer; }

h1,h2,h3,h4{ font-family: var(--f-display); font-weight: 500; line-height: 1.15; color: var(--ink); }
h1{ font-size: var(--fs-h1); letter-spacing: -.015em; }
h2{ font-size: var(--fs-h2); letter-spacing: -.01em; }
h3{ font-family: var(--f-body); font-weight: 600; font-size: var(--fs-h3); letter-spacing: 0; }

p{ text-wrap: pretty; }
strong{ font-weight: 600; color: var(--ink); }

:focus-visible{ outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* -------------------------------------------------------------- 4. PRIMITIVES */

.wrap{ max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }

.skip-link{
  position: absolute;
  left: 1rem; top: -3rem;
  z-index: 200;
  padding: .55rem 1rem;
  background: var(--accent);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: 600;
  border-radius: 0 0 var(--r) var(--r);
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus{ top: 0; }

.marker{
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.rule{ border: 0; border-top: 1px solid var(--rule); }

.page{ position: relative; }

/* ---------------------------------------------------------------- 5. NAVBAR */

.nav{
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base) linear, background var(--t-base) linear;
}
.nav.is-scrolled{ border-bottom-color: var(--rule); }

.nav-inner{
  position: relative;   /* anchor for the traveling underline */
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* one underline that slides between links, rather than N that fade in place.
   JS (ui.js) positions it under .nav-link.is-active; falls back to per-link
   ::after if it never initialises (.has-travel gates the swap). */
.nav-underline{
  position: absolute;
  left: 0; top: 0;
  width: 0; height: 1.5px;
  background: var(--accent);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--t-base) var(--ease), width var(--t-base) var(--ease), opacity var(--t-fast) linear;
}
.nav-underline.is-visible{ opacity: 1; }
.has-travel .nav-link.is-active::after{ opacity: 0; }

.nav-brand{
  font-family: var(--f-mono);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--ink);
}
.nav-brand b{ color: var(--accent); font-weight: 500; }

.nav-menu{ display: flex; align-items: center; gap: .35rem; list-style: none; }

.nav-link{
  position: relative;
  display: inline-block;
  padding: .5rem .7rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink-2);
  transition: color var(--t-fast) linear;
}
.nav-link::after{
  content: "";
  position: absolute;
  left: .7rem; right: .7rem; bottom: .28rem;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base) var(--ease);
}
.nav-link:hover{ color: var(--ink); }
.nav-link:hover::after,
.nav-link.is-active::after{ transform: scaleX(1); }
.nav-link.is-active{ color: var(--ink); }

.nav-controls{ display: flex; align-items: center; gap: .4rem; }

.icon-btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border: 1px solid var(--rule);
  border-radius: var(--r);
  color: var(--ink-2);
  transition: color var(--t-fast) linear, border-color var(--t-fast) linear, background var(--t-fast) linear;
}
.icon-btn:hover{ color: var(--ink); border-color: var(--rule-2); background: var(--paper-2); }
.icon-btn svg{ width: 17px; height: 17px; }

/* theme toggle: show the icon for the state you'd switch TO */
.theme-toggle .i-sun{ display: none; }
.theme-toggle .i-moon{ display: block; }
:root[data-theme="dark"] .theme-toggle .i-sun{ display: block; }
:root[data-theme="dark"] .theme-toggle .i-moon{ display: none; }
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]) .theme-toggle .i-sun{ display: block; }
  :root:not([data-theme="light"]) .theme-toggle .i-moon{ display: none; }
}

.lang{ position: relative; }
.lang-btn{
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  height: 38px;
  padding-inline: .7rem;
  border: 1px solid var(--rule);
  border-radius: var(--r);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  color: var(--ink-2);
  transition: color var(--t-fast) linear, border-color var(--t-fast) linear;
}
.lang-btn:hover{ color: var(--ink); border-color: var(--rule-2); }
.lang-btn svg{ width: 15px; height: 15px; }
.lang-menu{
  position: absolute;
  right: 0; top: calc(100% + .4rem);
  min-width: 150px;
  padding: .3rem;
  list-style: none;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--t-fast) linear, transform var(--t-fast) var(--ease), visibility var(--t-fast);
}
.lang-menu.is-open{ opacity: 1; visibility: visible; transform: translateY(0); }
.lang-menu button{
  display: block;
  width: 100%;
  padding: .5rem .6rem;
  text-align: left;
  font-size: var(--fs-sm);
  color: var(--ink-2);
  border-radius: 2px;
  transition: background var(--t-fast) linear, color var(--t-fast) linear;
}
.lang-menu button:hover{ background: var(--accent-wash); color: var(--ink); }
.lang-menu button[aria-current="true"]{ color: var(--accent); }

.nav-toggle{
  display: none;
  width: 38px; height: 38px;
  border: 1px solid var(--rule);
  border-radius: var(--r);
  color: var(--ink);
}
.nav-toggle span{
  display: block;
  width: 16px; height: 1.5px;
  margin: 3px auto;
  background: currentColor;
  transition: transform var(--t-base) var(--ease), opacity var(--t-base) linear;
}
.nav-toggle.is-open span:nth-child(1){ transform: translateY(4.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity: 0; }
.nav-toggle.is-open span:nth-child(3){ transform: translateY(-4.5px) rotate(-45deg); }

/* ------------------------------------------------------------------ 6. MAIN */

main{ display: block; }

.section{
  border-top: 1px solid var(--rule);
  padding-block: var(--section-y);
}
.section:first-of-type{ border-top: 0; }

.section-inner,
.hero-inner{
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: var(--marker-col) minmax(0, 1fr);
  gap: 0 clamp(1rem, 3vw, 2.5rem);
}

.section-marker{
  position: sticky;
  top: 92px;
  align-self: start;
  height: fit-content;
  padding-top: .2rem;
}
.section-marker span{ color: var(--accent); }
/* the marker of the section you're reading gets a filled node — same 45°-square
   vocabulary as .stack-group-title / .cell-title. Ties the left rail to the nav. */
@media (min-width: 901px){
  .section-marker::before{
    content: "";
    position: absolute;
    left: -.95rem; top: 1rem;
    width: 5px; height: 5px;
    background: var(--accent);
    transform: rotate(45deg) scale(0);
    transition: transform var(--t-base) var(--ease);
  }
  .section-marker.is-current::before{ transform: rotate(45deg) scale(1); }
}

.section-title{ font-size: var(--fs-h2); margin-bottom: 1.6rem; }
.section-body > * + *{ margin-top: 1.15rem; }

.prose{
  max-width: var(--prose);
  color: var(--ink-2);
  font-size: var(--fs-lead);
  line-height: 1.7;
}
.prose > * + *{ margin-top: 1rem; }
.prose strong{ color: var(--ink); }
.prose a{ text-decoration: underline; text-decoration-color: var(--rule-2); text-underline-offset: 3px; }
.prose a:hover{ text-decoration-color: var(--accent); }

/* ------------------------------------------------------------------ 7. HERO */

.hero{
  padding-top: clamp(6.5rem, 12vw, 9rem);
  padding-bottom: var(--section-y);
}

.identity{
  position: relative;
  max-width: 760px;
  padding: clamp(1.4rem, 3vw, 2.1rem) clamp(1.3rem, 3vw, 2.2rem);
  background: var(--accent-wash);
  border: 1px solid var(--rule);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--r) var(--r) 0;
}
.identity-name{
  font-size: var(--fs-hero);
  font-weight: 500;
  letter-spacing: -.02em;
  line-height: 1.05;
}
.identity-name .caret{
  display: inline-block;
  width: .09em; height: .82em;
  margin-left: .1em;
  vertical-align: -.06em;
  background: var(--accent);
  opacity: 0;   /* only present during the load sequence; nothing on repeat visits */
}
.identity-sep{ margin: 1rem 0; border: 0; border-top: 1px solid var(--rule); }

/* ---- hero load sequence -------------------------------------------------
   The identity resolves like a returned record: the accent bar draws in,
   the rule wipes across, the typed attributes populate top→down, the block
   caret blinks a couple of times and clears. JS (reveal.js) plays it once
   per session and skips it entirely under reduced motion. */
.identity::before{
  content: "";
  position: absolute;
  left: -2px; top: 0; bottom: 0;
  width: 2px;
  background: var(--paper);          /* a mask over the accent border, then it retracts */
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 300ms var(--ease);
}
.identity[data-hero-seq] .identity-sep{ transform-origin: left; transition: transform 320ms var(--ease) 110ms; }
.identity[data-hero-seq] .attr{ transition: opacity 260ms var(--ease), transform 260ms var(--ease); }

.js .identity[data-hero-seq]:not(.hero-run):not(.hero-done)::before{ transform: scaleY(1); }
.js .identity[data-hero-seq]:not(.hero-run):not(.hero-done) .identity-sep{ transform: scaleX(0); }
.js .identity[data-hero-seq]:not(.hero-run):not(.hero-done) .attr{ opacity: 0; transform: translateX(-6px); }

.identity[data-hero-seq].hero-run .attr:nth-child(1){ transition-delay: 130ms; }
.identity[data-hero-seq].hero-run .attr:nth-child(2){ transition-delay: 210ms; }
.identity[data-hero-seq].hero-run .attr:nth-child(3){ transition-delay: 290ms; }

.js .identity[data-hero-seq].hero-run .identity-name .caret{
  opacity: 1;
  animation: caret-blink .56s steps(1) 2;
}
.js .identity[data-hero-seq].hero-caret-done .identity-name .caret{
  animation: none;
  opacity: 0;
  transition: opacity 340ms linear;
}
.identity-attrs{
  display: grid;
  gap: .55rem;
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
}
.attr{ display: flex; gap: .9rem; align-items: baseline; }
.attr-k{
  flex: none;
  width: 4.5rem;
  color: var(--ink-3);
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.attr-v{ color: var(--ink); font-variant-numeric: tabular-nums; }
.attr-v .x{ color: var(--ink-3); margin-inline: .5rem; }
.attr-v a{ color: var(--ink); text-decoration: underline; text-decoration-color: var(--rule-2); text-underline-offset: 3px; }
.attr-v a:hover{ text-decoration-color: var(--accent); }

.hero-lead{
  max-width: 46ch;
  margin-top: 1.6rem;
  font-size: var(--fs-lead);
  color: var(--ink-2);
  line-height: 1.6;
}
.hero-actions{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .9rem 1.4rem;
  margin-top: 1.8rem;
}

/* ---------------------------------------------------------------- 8. BUTTONS */

.btn{
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .72rem 1.15rem;
  border: 1px solid var(--accent);
  border-radius: var(--r);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: .01em;
  transition: background var(--t-fast) linear, border-color var(--t-fast) linear, color var(--t-fast) linear;
}
.btn svg{ width: 15px; height: 15px; }
.btn-primary{ background: var(--accent); color: #fff; }
.btn-primary:hover{ background: var(--accent-2); border-color: var(--accent-2); }
.btn-primary:active{ background: var(--accent-2); border-color: var(--accent-2); }
.btn-ghost{ background: transparent; color: var(--accent); }
.btn-ghost:hover,
.btn-ghost:active{ background: var(--accent-wash); }

.btn,.icon-btn,.lang-btn,.nav-toggle,.to-top{ -webkit-tap-highlight-color: transparent; }
.icon-btn:active,.lang-btn:active{ background: var(--paper-3); border-color: var(--rule-2); }

.link-arrow{
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-weight: 600;
  font-size: var(--fs-sm);
  color: var(--accent);
}
.link-arrow svg{ width: 14px; height: 14px; transition: transform var(--t-base) var(--ease); }
.link-arrow:hover svg{ transform: translateX(3px); }
.link-arrow:active svg{ transform: translateX(1px); }

/* ------------------------------------------------------------ 9. KEY-VALUE */

.keyval{
  max-width: var(--prose);
  border: 1px solid var(--rule);
  border-radius: var(--r);
  overflow: hidden;
}
.keyval-row{
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  gap: 1rem;
  padding: .85rem 1rem;
  border-top: 1px solid var(--rule);
}
.keyval-row:first-child{ border-top: 0; }
.keyval-row dt{
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: .1rem;
}
.keyval-row dd{ color: var(--ink); }
.keyval-row dd a{ text-decoration: underline; text-decoration-color: var(--rule-2); text-underline-offset: 3px; }
.keyval-row dd a:hover{ text-decoration-color: var(--accent); }

/* --------------------------------------------------------------- 10. STACK */

.grid-cells,
.stack-grid,
.stats,
.notes,
.related-grid{
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--r);
  overflow: hidden;
}
.stack-grid{ grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1000px){ .stack-grid{ grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px){ .stack-grid{ grid-template-columns: 1fr; } }

.stack-group{ padding: 1.3rem 1.25rem; background: var(--paper); }
.stack-group-title{
  display: flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: .9rem;
  font-family: var(--f-body);
  font-weight: 600;
  font-size: .98rem;
  color: var(--ink);
}
.stack-group-title::before{ content: ""; width: 6px; height: 6px; background: var(--accent); transform: rotate(45deg); }
.stack-list{ list-style: none; display: grid; gap: .5rem; }
.stack-list li{ font-family: var(--f-mono); font-size: var(--fs-sm); color: var(--ink-2); line-height: 1.5; }
.stack-list a{
  color: var(--ink-2);
  text-decoration: underline;
  text-decoration-color: var(--rule-2);
  text-underline-offset: 3px;
  transition: color var(--t-fast) linear;
}
.stack-list a:hover{ color: var(--accent); text-decoration-color: var(--accent); }

.tags{ display: flex; flex-wrap: wrap; gap: .5rem; }
.tag{
  padding: .32rem .7rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .02em;
  color: var(--ink-2);
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: var(--r);
}
.tags-block{ margin-top: 1.5rem; }
.tags-block .marker{ display: block; margin-bottom: .8rem; }

/* --------------------------------------------------------- 11. TRACK RECORD */

.stats{ grid-template-columns: repeat(3, 1fr); margin-top: 0; }
@media (max-width: 460px){ .stats{ grid-template-columns: 1fr; } }
.stat{ padding: 1.3rem 1.25rem; background: var(--paper); }
.stat-num{
  font-family: var(--f-mono);
  font-size: clamp(1.8rem, 1.4rem + 1.6vw, 2.6rem);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  line-height: 1;
}
.stat-num .u{ color: var(--accent); }
.stat-label{ margin-top: .5rem; font-size: var(--fs-sm); color: var(--ink-2); }

.notes{ margin-top: 1.5rem; }
.note{
  padding: 1.15rem 1.25rem;
  background: var(--paper);
  transition: background var(--t-fast) linear;
}
.note h3{ font-size: 1.02rem; margin-bottom: .3rem; }
.note p{ color: var(--ink-2); font-size: var(--fs-sm); max-width: 62ch; }

/* ---------------------------------------------------------------- 12. WORK */

.selectable{ position: relative; background: var(--paper); transition: background var(--t-fast) linear; }
.selectable::before{
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--t-base) var(--ease);
}
@media (hover: hover){
  .selectable.is-linked{ cursor: pointer; }   /* whole row navigates to its title link (ui.js) */
  .selectable:hover{ background: var(--accent-wash); }
  .selectable:hover::before{ transform: scaleY(1); }
  .selectable.is-linked:active{ background: var(--accent-wash); }
}
.selectable:focus-within{ background: var(--accent-wash); }
.selectable:focus-within::before{ transform: scaleY(1); }

.work-item{
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  padding: clamp(1.3rem, 3vw, 1.8rem) clamp(1.1rem, 3vw, 1.6rem);
  align-items: start;
}
.work-figure{
  border: 1px solid var(--rule);
  border-radius: var(--r);
  background: var(--paper-2);
  padding: .55rem;
  color: var(--ink-2);
}
.work-figure svg{ width: 100%; height: auto; }
.work-title{ font-size: 1.15rem; margin-bottom: .4rem; }
.work-title a{ color: var(--ink); }
.work-title a:hover{ color: var(--accent); }
.work-desc{ color: var(--ink-2); font-size: var(--fs-sm); max-width: 60ch; }
.work-tags{ display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .9rem; }
.work-meta{
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1rem;
  margin-top: .8rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--ink-3);
}
.work-meta span{ display: inline-flex; align-items: center; gap: .4rem; }
.work-meta svg{ width: 13px; height: 13px; color: var(--accent); }

/* -------------------------------------------------------------- 13. WRITING */

.search{ position: relative; max-width: 520px; margin-bottom: .7rem; }
.search > svg{ position: absolute; left: .85rem; top: 50%; transform: translateY(-50%); width: 15px; height: 15px; color: var(--ink-3); pointer-events: none; }
.search input{
  width: 100%;
  padding: .7rem 2.6rem .7rem 2.4rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r);
  font-size: var(--fs-sm);
  transition: border-color var(--t-fast) linear;
}
.search input::placeholder{ color: var(--ink-3); }
.search input:focus{ outline: none; border-color: var(--accent); }

.search-clear{
  position: absolute;
  right: .5rem; top: 50%;
  transform: translateY(-50%);
  width: 26px; height: 26px;
  display: none;
  align-items: center; justify-content: center;
  color: var(--ink-3);
  border-radius: 3px;
  -webkit-tap-highlight-color: transparent;
}
.search-clear.is-visible{ display: inline-flex; }
.search-clear svg{ width: 13px; height: 13px; }
.search-clear:hover,
.search-clear:active{ color: var(--ink); background: var(--paper-2); }

.search-count{
  margin-bottom: 1.5rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}
.search-count[hidden]{ display: none; }

/* blog-row filter: fade out before collapsing, rather than a hard cut */
.article-row{ transition: opacity 150ms linear; }
.article-row.is-out{ opacity: 0; }

/* article tags double as filters */
.ar-tags .tag.is-clickable{ cursor: pointer; transition: color var(--t-fast) linear, border-color var(--t-fast) linear; }
.ar-tags .tag.is-clickable:hover,
.ar-tags .tag.is-clickable:focus-visible{ color: var(--accent); border-color: var(--accent); }

.article-row{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .5rem;
  padding: clamp(1.15rem, 3vw, 1.6rem);
}
.article-row.is-featured{
  grid-template-columns: 160px minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  align-items: start;
}
.ar-figure{
  display: none;
  border: 1px solid var(--rule);
  border-radius: var(--r);
  background: var(--paper-2);
  padding: .55rem;
  color: var(--ink-2);
}
.article-row.is-featured .ar-figure{ display: block; }
.ar-figure svg{ width: 100%; height: auto; }
.ar-meta{
  display: flex;
  flex-wrap: wrap;
  gap: .3rem .9rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
  color: var(--ink-3);
}
.ar-meta .cat{ color: var(--accent); }
.ar-title{
  font-family: var(--f-display);
  font-weight: 500;
  font-size: 1.22rem;
  line-height: 1.25;
  letter-spacing: -.01em;
}
.article-row.is-featured .ar-title{ font-size: clamp(1.35rem, 1.1rem + 1vw, 1.7rem); }
.ar-title a{ color: var(--ink); }
.ar-title a:hover{ color: var(--accent); }
.ar-desc{ color: var(--ink-2); font-size: var(--fs-sm); max-width: 68ch; }
.ar-tags{ display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .2rem; }
.ar-more{ margin-top: .3rem; }
.ar-body{ display: grid; gap: .5rem; align-content: start; }
.ar-empty{ padding: 1.6rem 1rem; text-align: center; }

[hidden]{ display: none !important; }
.btn i,.link-arrow i,.work-meta i,.ar-more i{ display: none; }

/* --------------------------------------------------------------- 14. CONTACT */

.contact-cta{ margin-top: 1.6rem; }

/* ---------------------------------------------------------------- 15. FOOTER */

.footer{ border-top: 1px solid var(--rule); padding-block: 2.5rem; }
.footer-inner{
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.footer-links{ display: flex; gap: 1.2rem; }
.footer-links a{ color: var(--ink-2); font-size: var(--fs-sm); transition: color var(--t-fast) linear; }
.footer-links a:hover{ color: var(--accent); }
.footer-note{ font-family: var(--f-mono); font-size: var(--fs-xs); color: var(--ink-3); letter-spacing: .03em; }

.to-top{
  position: fixed;
  right: 1.4rem; bottom: 1.4rem;
  z-index: 90;
  width: 40px; height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: var(--r);
  color: var(--ink-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity var(--t-base) linear, transform var(--t-base) var(--ease), visibility var(--t-base), color var(--t-fast) linear, border-color var(--t-fast) linear;
}
.to-top.is-visible{ opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover{ color: var(--accent); border-color: var(--accent); }
.to-top svg{ width: 15px; height: 15px; }

/* --------------------------------------------------------- 16. RELATION LINE */

.relation{
  position: absolute;
  left: 0; right: 0; top: 0;
  margin-inline: auto;
  width: var(--wrap);
  max-width: 100%;
  padding-inline: var(--gutter);
  height: 100%;
  pointer-events: none;
}
.relation svg{ position: sticky; top: 92px; width: 12px; height: calc(100vh - 140px); overflow: visible; margin-left: -1.4rem; }
.relation .track{ stroke: var(--rule); stroke-width: 1.5; fill: none; }
.relation .progress{ stroke: var(--accent); stroke-width: 1.5; fill: none; stroke-linecap: round; }
.relation .node{ fill: var(--paper); stroke: var(--rule-2); stroke-width: 1.5; transition: fill var(--t-base) linear, stroke var(--t-base) linear, r var(--t-fast) var(--ease); }
.relation .node.is-passed{ fill: var(--accent); stroke: var(--accent); }
.relation .node.is-current{ fill: var(--accent); stroke: var(--accent); r: 4.4; }
.relation .hit{ fill: transparent; stroke: none; pointer-events: auto; cursor: pointer; }

/* ------------------------------------------------------------- 17. ARTICLE
   Stili condivisi per i 7 blog-*.html — definiti ora, usati dalla Fase 2. */

.article{ position: relative; max-width: var(--prose); margin-inline: auto; padding: clamp(6.5rem, 12vw, 9rem) var(--gutter) 4rem; }

/* reading spine — the relation line, recast for long-form: a vertical progress
   line in the left margin with a node at every section heading. "You're N%
   through the query." Injected + driven by reveal.js; desktop only. */
.read-spine{
  position: absolute;
  left: -2.75rem; top: 0;
  width: 12px; height: 100%;
  pointer-events: none;
}
.read-spine svg{ position: sticky; top: 120px; width: 12px; height: calc(100vh - 200px); overflow: visible; }
.read-spine .track{ stroke: var(--rule); stroke-width: 1.5; fill: none; }
.read-spine .progress{ stroke: var(--accent); stroke-width: 1.5; fill: none; stroke-linecap: round; }
.read-spine .node{ fill: var(--paper); stroke: var(--rule-2); stroke-width: 1.5; transition: fill var(--t-base) linear, stroke var(--t-base) linear; }
.read-spine .node.is-passed{ fill: var(--accent); stroke: var(--accent); }
.read-spine .hit{ fill: transparent; stroke: none; pointer-events: auto; cursor: pointer; }
@media (max-width: 1040px){ .read-spine{ display: none; } }
.back-link{
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin-bottom: 2rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.back-link svg{ width: 16px; height: 16px; flex: none; }
.back-link:hover{ color: var(--accent); }
.back-link:hover svg{ transform: translateX(-2px); transition: transform var(--t-base) var(--ease); }
.article-head{ margin-bottom: 2.5rem; }
.article-meta{
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1rem;
  margin-bottom: 1.1rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
  color: var(--ink-3);
}
.article-meta .cat{ color: var(--accent); }
.article-title{ font-size: var(--fs-h1); line-height: 1.15; letter-spacing: -.015em; }
.article-excerpt{ margin-top: 1.1rem; font-size: var(--fs-lead); color: var(--ink-2); line-height: 1.6; }
.article-tags{ display: flex; flex-wrap: wrap; gap: .45rem; margin-top: 1.3rem; }

.article-body{ font-size: 1.075rem; line-height: 1.75; color: var(--ink); }
.article-body > * + *{ margin-top: 1.4rem; }
.article-body h2{ margin-top: 2.8rem; padding-top: 1.1rem; border-top: 1px solid var(--rule); font-size: var(--fs-h2); }
.article-body h2::before{ content: "# "; font-family: var(--f-mono); font-size: .7em; font-weight: 500; color: var(--accent); vertical-align: .12em; }
.article-body h3{ margin-top: 2rem; font-size: 1.15rem; }
.article-body a{ text-decoration: underline; text-decoration-color: var(--rule-2); text-underline-offset: 3px; }
.article-body a:hover{ text-decoration-color: var(--accent); }
.article-body ul,.article-body ol{ padding-left: 1.4rem; }
.article-body li{ margin-top: .5rem; }
.article-body li::marker{ color: var(--ink-3); }
.article-body strong{ color: var(--ink); }
.article-body code{
  font-family: var(--f-mono);
  font-size: .875em;
  padding: .12em .4em;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 3px;
}
.article-body pre{
  padding: 1.2rem 1.3rem;
  background: var(--code-bg);
  border-radius: var(--r);
  overflow-x: auto;
  font-size: .9rem;
  line-height: 1.6;
}
.article-body pre code{ padding: 0; background: none; border: 0; color: var(--code-ink); }
.article-body blockquote,
.article-aside{
  padding: 1.1rem 1.3rem;
  border-left: 2px solid var(--accent);
  background: var(--accent-wash);
  border-radius: 0 var(--r) var(--r) 0;
}
.article-aside .aside-title{ display: flex; align-items: center; gap: .5rem; margin-bottom: .5rem; font-weight: 600; color: var(--ink); }

.article-body h4{ font-family: var(--f-body); font-weight: 600; font-size: 1rem; margin-top: 1.6rem; }
.article-body .before-after,
.article-body .pros-cons{ display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: var(--r); overflow: hidden; }
@media (min-width: 640px){
  .article-body .before-after,
  .article-body .pros-cons{ grid-template-columns: 1fr 1fr; }
}
.article-body .before-box,
.article-body .after-box,
.article-body .pros-box,
.article-body .cons-box{ padding: 1.15rem 1.25rem; background: var(--paper); }
.article-body .before-box h4,
.article-body .after-box h4,
.article-body .pros-box h4,
.article-body .cons-box h4{ margin-top: 0; margin-bottom: .7rem; font-family: var(--f-mono); font-size: var(--fs-xs); letter-spacing: .05em; text-transform: uppercase; color: var(--ink-2); }
.article-body .before-box pre,
.article-body .after-box pre,
.article-body .pros-box ul,
.article-body .cons-box ul{ margin: 0; }
.article-body .before-box pre,
.article-body .after-box pre{ font-size: .82rem; }

.article-table-wrap{ overflow-x: auto; }
.article-body table{ width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.article-body th,
.article-body td{ padding: .75rem .9rem; text-align: left; border-bottom: 1px solid var(--rule); vertical-align: top; }
.article-body th{
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-2);
  background: var(--paper-2);
}
.article-body td{ font-variant-numeric: tabular-nums; }

.author-card{ display: grid; gap: .5rem; margin-top: 3.5rem; padding: 1.5rem; border: 1px solid var(--rule); border-radius: var(--r); }
.author-card .marker{ margin-bottom: .2rem; }

.related{ margin-top: 3.5rem; padding-top: 1.5rem; border-top: 1px solid var(--rule); }
.related > .marker{ display: block; margin-bottom: 1rem; }
.related-grid{ grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.related-card{ display: block; padding: 1.15rem; background: var(--paper); transition: background var(--t-fast) linear; }
.related-card:hover{ background: var(--accent-wash); }
.related-card .rc-tag{
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--accent);
}
.related-card strong{ display: block; margin: .4rem 0 .3rem; color: var(--ink); font-size: .96rem; line-height: 1.3; }
.related-card p{ font-size: var(--fs-sm); color: var(--ink-2); }

/* ------------------------------------------------------------- 17b. SERVICES
   Pagine servizi: stesso vocabolario editoriale della home. */

.breadcrumb{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1.4rem;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
  color: var(--ink-3);
}
.breadcrumb a{ color: var(--ink-2); }
.breadcrumb a:hover{ color: var(--accent); }
.breadcrumb .sep{ color: var(--rule-2); }
.breadcrumb [aria-current]{ color: var(--ink); }

.svc-lead{ max-width: 54ch; margin-top: 1.4rem; font-size: var(--fs-lead); color: var(--ink-2); line-height: 1.6; }

/* feature cells — reuse .grid-cells shared grid */
.grid-cells{ grid-template-columns: repeat(2, 1fr); }
@media (max-width: 620px){ .grid-cells{ grid-template-columns: 1fr; } }
.cell{ padding: 1.3rem 1.35rem; background: var(--paper); }
.cell-title{
  display: flex;
  align-items: baseline;
  gap: .55rem;
  margin-bottom: .5rem;
  font-family: var(--f-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink);
}
.cell-title::before{
  content: "";
  flex: none;
  width: 6px; height: 6px;
  background: var(--accent);
  transform: rotate(45deg);
  translate: 0 -1px;
}
.cell p{ color: var(--ink-2); font-size: var(--fs-sm); line-height: 1.6; }
.cell ul{ margin-top: .5rem; padding-left: 1.1rem; color: var(--ink-2); font-size: var(--fs-sm); }
.cell li{ margin-top: .3rem; }
.cell li::marker{ color: var(--ink-3); }

/* numbered process — a sequence, so numerals carry real order */
.steps{ counter-reset: step; display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: var(--r); overflow: hidden; }
.step{
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.15rem 1.3rem;
  background: var(--paper);
}
.step::before{
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  color: var(--accent);
  padding-top: .1rem;
}
.step h3{ grid-column: 2; font-size: 1rem; margin-bottom: .25rem; }
.step p{ grid-column: 2; color: var(--ink-2); font-size: var(--fs-sm); line-height: 1.6; }

/* faq — editorial disclosure */
.faq{ border: 1px solid var(--rule); border-radius: var(--r); overflow: hidden; max-width: var(--prose); }
.faq-item{ border-top: 1px solid var(--rule); background: var(--paper); }
.faq-item:first-child{ border-top: 0; }
.faq-item summary{
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.15rem;
  font-weight: 600;
  font-size: .96rem;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker{ display: none; }
.faq-item summary::after{
  content: "+";
  flex: none;
  font-family: var(--f-mono);
  font-weight: 400;
  color: var(--accent);
  transition: transform var(--t-base) var(--ease);
}
.faq-item[open] summary::after{ transform: rotate(45deg); }
.faq-item summary:hover{ color: var(--accent); }
.faq-item .faq-a{ padding: 0 1.15rem 1.15rem; color: var(--ink-2); font-size: var(--fs-sm); line-height: 1.7; }
.faq-item .faq-a > * + *{ margin-top: .7rem; }

/* smooth disclosure where the engine supports it (Chromium 131+); everywhere
   else this @supports block is skipped and the native instant toggle stands. */
@supports (interpolate-size: allow-keywords){
  :root{ interpolate-size: allow-keywords; }
  .faq-item::details-content{
    block-size: 0;
    overflow: clip;
    opacity: 0;
    transition: block-size var(--t-base) var(--ease), opacity var(--t-base) linear, content-visibility var(--t-base) allow-discrete;
  }
  .faq-item[open]::details-content{ block-size: auto; opacity: 1; }
}

/* closing CTA band */
.cta-band{
  border-top: 1px solid var(--rule);
  padding-block: var(--section-y);
}
.cta-band-inner{
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(1.8rem, 4vw, 2.75rem) var(--gutter);
}
.cta-band-panel{
  max-width: 640px;
  padding: clamp(1.5rem, 3vw, 2.1rem);
  background: var(--accent-wash);
  border: 1px solid var(--rule);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--r) var(--r) 0;
}
.cta-band h2{ font-size: var(--fs-h2); }
.cta-band p{ margin-top: .7rem; color: var(--ink-2); font-size: var(--fs-lead); line-height: 1.6; max-width: 46ch; }
.cta-band .btn{ margin-top: 1.4rem; }

/* services index — quick nav to the five services */
.quicknav{ display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: var(--r); overflow: hidden; max-width: var(--wrap); }
.quicknav a{
  padding: 1rem .9rem;
  background: var(--paper);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  letter-spacing: .03em;
  color: var(--ink-2);
  text-align: center;
  transition: background var(--t-fast) linear, color var(--t-fast) linear;
}
.quicknav a:hover{ background: var(--accent-wash); color: var(--accent); }
@media (max-width: 760px){ .quicknav{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 380px){ .quicknav{ grid-template-columns: 1fr; } }

/* pricing plans (database-maintenance) */
.plan-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: var(--r); overflow: hidden; }
@media (max-width: 820px){ .plan-grid{ grid-template-columns: 1fr; } }
.plan{ display: flex; flex-direction: column; padding: 1.4rem 1.35rem; background: var(--paper); }
.plan.is-featured{ background: var(--accent-wash); }
.plan-badge{ align-self: flex-start; margin-bottom: .6rem; padding: .2rem .55rem; font-family: var(--f-mono); font-size: var(--fs-xs); letter-spacing: .04em; color: var(--accent); border: 1px solid var(--accent); border-radius: var(--r); }
.plan h3{ font-family: var(--f-display); font-weight: 500; font-size: 1.2rem; }
.plan-price{ margin-top: .3rem; font-family: var(--f-mono); font-size: var(--fs-sm); color: var(--ink-2); }
.plan-features{ list-style: none; margin: 1rem 0 1.3rem; display: grid; gap: .5rem; }
.plan-features li{ position: relative; padding-left: 1.2rem; font-size: var(--fs-sm); color: var(--ink-2); line-height: 1.5; }
.plan-features li::before{ content: ""; position: absolute; left: 0; top: .5em; width: 6px; height: 6px; background: var(--accent); transform: rotate(45deg); }
.plan .btn{ margin-top: auto; align-self: flex-start; }

/* service list on the index — selectable rows */
.svc-list{ display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: var(--r); overflow: hidden; }
.svc-item{ padding: clamp(1.3rem, 3vw, 1.8rem) clamp(1.1rem, 3vw, 1.5rem); background: var(--paper); }
.svc-item-head{ display: flex; flex-wrap: wrap; align-items: baseline; gap: .5rem 1rem; }
.svc-item h3{ font-family: var(--f-display); font-weight: 500; font-size: 1.3rem; letter-spacing: -.01em; }
.svc-item h3 a{ color: var(--ink); }
.svc-item h3 a:hover{ color: var(--accent); }
.svc-item .svc-tagline{ font-family: var(--f-mono); font-size: var(--fs-xs); color: var(--ink-3); }
.svc-item p{ margin-top: .5rem; color: var(--ink-2); font-size: var(--fs-sm); line-height: 1.6; max-width: 68ch; }
.svc-item .link-arrow{ margin-top: .9rem; }

/* ------------------------------------------------------------ 17c. CODE (hljs)
   Tema compatto per highlight.js — i blocchi codice sono sempre su fondo scuro. */

.hljs{ color: var(--code-ink); background: var(--code-bg); }
.hljs-comment,.hljs-quote{ color: #6b7686; font-style: italic; }
.hljs-keyword,.hljs-selector-tag,.hljs-literal,.hljs-section,.hljs-link{ color: #7fb3d5; }
.hljs-function .hljs-keyword{ color: #7fb3d5; }
.hljs-string,.hljs-regexp,.hljs-addition,.hljs-attribute,.hljs-meta .hljs-string{ color: #7fc8a9; }
.hljs-number,.hljs-built_in,.hljs-class .hljs-title,.hljs-type{ color: #d9b08c; }
.hljs-title,.hljs-title.function_,.hljs-attr,.hljs-variable,.hljs-template-variable,.hljs-selector-id,.hljs-selector-class{ color: #e0e0d8; }
.hljs-symbol,.hljs-bullet,.hljs-subst,.hljs-meta,.hljs-deletion{ color: #cf8b6c; }
.hljs-emphasis{ font-style: italic; }
.hljs-strong{ font-weight: 600; }

/* ---------------------------------------------------------------- 18. MOTION */

@keyframes caret-blink{ 0%,49%{opacity:1} 50%,100%{opacity:0} }

[data-reveal]{
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}
[data-reveal].is-revealed{ opacity: 1; transform: none; }
/* safety net: if the .js flag never lands (script blocked / failed), the
   reveal never runs — so don't let it hide anything. */
html:not(.js) [data-reveal]{ opacity: 1 !important; transform: none !important; }

/* scroll-progress bar — the mobile stand-in for the relation line / reading
   spine (both hidden < 901px). Informational, like a scrollbar. Injected by ui.js. */
.scroll-progress{
  position: fixed;
  left: 0; top: 0;
  z-index: 101;
  width: 100%; height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  pointer-events: none;
}
@media (min-width: 901px){ .scroll-progress{ display: none; } }

/* -------------------------------------------------------------- 19. RESPONSIVE */

@media (max-width: 900px){
  :root{ --marker-col: 0px; }

  .section-inner,
  .hero-inner{ grid-template-columns: minmax(0, 1fr); }

  .section-marker{ position: static; margin-bottom: 1rem; padding-top: 0; }
  .relation{ display: none; }
  .nav-underline{ display: none; }

  .nav-menu{
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .5rem var(--gutter) 1.5rem;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t-base) linear, transform var(--t-base) var(--ease), visibility var(--t-base);
  }
  .nav-menu.is-open{ opacity: 1; visibility: visible; transform: none; }
  .nav-menu .nav-link{ padding: .85rem .2rem; border-bottom: 1px solid var(--rule); font-size: 1rem; }
  .nav-menu .nav-link::after{ display: none; }
  .nav-menu .lang{ margin-top: .8rem; }
  .nav-menu .lang-btn{ width: 100%; justify-content: flex-start; }
  .nav-menu .lang-menu{ position: static; min-width: 0; border: 0; background: none; padding: 0; margin: 0; transform: none; opacity: 1; visibility: visible; display: none; }
  .nav-menu .lang-menu.is-open{ display: block; margin-top: .3rem; }
  .nav-menu .lang-menu button{ padding-left: 0; }
  .nav-toggle{ display: block; }
  .nav-controls .theme-toggle{ margin-right: 46px; }
}

@media (max-width: 620px){
  .work-item{ grid-template-columns: minmax(0, 1fr); }
  .work-figure{ max-width: 132px; }
  .article-row.is-featured{ grid-template-columns: minmax(0, 1fr); }
  .article-row.is-featured .ar-figure{ display: none; }
  .identity-attrs{ font-size: var(--fs-xs); }
  .attr{ flex-direction: column; gap: .1rem; }
  .attr-k{ width: auto; }
  .keyval-row{ grid-template-columns: minmax(0,1fr); gap: .2rem; }
  .footer-inner{ flex-direction: column; align-items: flex-start; }
  .step{ grid-template-columns: 2.2rem minmax(0, 1fr); gap: .8rem; }
}

/* --------------------------------------------------------- 20. REDUCED MOTION */

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *,*::before,*::after{
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal]{ opacity: 1; transform: none; }
  /* hero sequence: show the end state, no caret */
  .identity-name .caret{ display: none; }
  .identity::before{ transform: scaleY(0) !important; }
  .identity[data-hero-seq] .identity-sep{ transform: none !important; }
  .identity[data-hero-seq] .attr{ opacity: 1 !important; transform: none !important; }
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*){ animation: none !important; }
}

/* ------------------------------------------------------------------- 21. PRINT */

@media print{
  .nav,.to-top,.relation,.read-spine,.scroll-progress,.hero-actions,.cta-band,.quicknav{ display: none; }
  body{ background: #fff; color: #000; }
  .section,.cta-band{ border-color: #ccc; }
  .article-body pre,.hljs{ background: #f4f4f4; color: #000; border: 1px solid #ccc; }
}