/* ==========================================================================
   spurNscale — design system
   Dark, technical / architectural theme. Independent from any other
   RABBIT/PocketTwin stylesheet — this is spurNscale's own visual identity,
   meant to be reused across every spurNscale page (home, configuratore,
   portfolio, works, ...).
   ========================================================================== */

:root{
  --bg:            #101214;
  --bg-alt:        #16191c;
  --panel:         #1b1f22;
  --line:          rgba(255,255,255,0.10);
  --line-strong:   rgba(255,255,255,0.20);
  --ink:           #f3f2ee;
  --ink-soft:      #a7adb2;
  --ink-faint:     #6b7176;
  --accent:        #c98a3b;
  --accent-soft:   rgba(201,138,59,0.14);
  --accent-line:   rgba(201,138,59,0.45);

  --font-display: 'Archivo', 'Arial Narrow', sans-serif;
  --font-body:    'Archivo', Helvetica, Arial, sans-serif;
  --font-mono:    'IBM Plex Mono', 'Space Mono', monospace;

  --wrap: 1180px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }

.wrap{
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 32px;
}

.mono{
  font-family: var(--font-mono);
  letter-spacing: .04em;
  text-transform: uppercase;
  font-size: 12px;
}

/* background blueprint grid, used behind hero/sections */
.blueprint-grid{
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .35;
  pointer-events: none;
}

/* ---------- header ---------- */
.launch-banner{
  background: var(--accent-soft);
  border-bottom: 1px solid var(--accent-line);
  color: var(--ink-soft);
  text-align: center;
  padding: 18px 20px;
  line-height: 1.6;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
}
.launch-banner b{ color: var(--accent); }
.launch-banner a{ color: var(--ink); text-decoration: underline; }
.launch-banner a:hover{ color: var(--accent); }

header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(16,18,20,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
header nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
}
.brand{
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand img{ height: 34px; width: auto; }
.brand .name{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: .02em;
}
.brand .name em{
  color: var(--accent);
  font-style: normal;
}
.nav-links{
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.nav-links a:hover{ color: var(--ink); border-color: var(--accent-line); }
.nav-links a.minor{ color: var(--ink-faint); font-size: 11px; }
.nav-links a.minor:hover{ color: var(--ink-soft); }
.nav-cta{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  border: 1px solid var(--accent-line);
  color: var(--accent);
  padding: 9px 18px;
  transition: background .15s ease, color .15s ease;
}
.nav-cta:hover{ background: var(--accent); color: #14100a; }
.nav-toggle{
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span{ width: 22px; height: 1px; background: var(--ink); }

/* ---------- hero ---------- */
.hero{
  position: relative;
  overflow: hidden;
  padding: 96px 0 88px;
  border-bottom: 1px solid var(--line);
}
.hero .wrap{ position: relative; z-index: 2; }
.kicker{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  margin-bottom: 22px;
}
.kicker::before{
  content: '';
  width: 22px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}
.hero h1{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 5.4vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 22px;
  max-width: 16ch;
}
.hero h1 span{ color: var(--accent); }
.hero .lede{
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 56ch;
  margin: 0 0 36px;
}
.hero-actions{
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary, .btn-ghost{
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 14px 26px;
  border: 1px solid transparent;
  display: inline-block;
  background: transparent;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary{
  background: var(--accent);
  color: #14100a;
  border-color: var(--accent);
}
.btn-primary:hover{ background: transparent; color: var(--accent); }
.btn-ghost{
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-ghost:hover{ border-color: var(--accent-line); color: var(--accent); }

.scale-tags{
  display: flex;
  gap: 14px;
  margin-top: 44px;
  flex-wrap: wrap;
}
.scale-tag{
  border: 1px solid var(--line-strong);
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
}
.scale-tag b{ color: var(--ink); font-weight: 600; }

/* ---------- section shell ---------- */
section.block{
  padding: 88px 0;
  border-bottom: 1px solid var(--line);
}
section.block.alt{ background: var(--bg-alt); }
.section-head{
  max-width: 62ch;
  margin: 0 0 52px;
}
/* the small yellow labels above each heading ("early bird", "come funziona", "materiale"...): all the same,
   readable size */
.section-head .mono,
.eyebrow{
  font-family: var(--font-mono);
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  font-size: 18px;
  letter-spacing: .14em;
  margin-bottom: 18px;
}
.hero .kicker{ font-size: 18px; letter-spacing: .14em; }
/* centred title of the early-bird strip: same look as the other section titles */
/* ---------- gallery.html ---------- */
.gallery-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 22px;
}
.gallery-card{
  display: block;
  padding: 0;
  text-align: left;
  background: var(--panel);
  border: 1px solid var(--line);
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: border-color .15s ease, transform .15s ease;
}
.gallery-card:hover, .gallery-card:focus-visible{ border-color: var(--accent); transform: translateY(-2px); }
.gallery-img{ display: block; position: relative; aspect-ratio: 1 / 1; overflow: hidden; background: var(--bg-alt); }
.gallery-img > img{ width: 100%; height: 100%; object-fit: cover; display: block; }
.gallery-inset{
  position: absolute;
  left: 10px;
  bottom: 10px;
  width: 30%;
  aspect-ratio: 1 / 1;
  border: 2px solid var(--accent);
  background: var(--bg);
  box-shadow: 0 2px 10px rgba(0,0,0,.5);
}
.gallery-inset img{ width: 100%; height: 100%; object-fit: cover; display: block; }
.gallery-inset i{
  position: absolute;
  left: 0; right: 0; bottom: 0;
  font: normal 10px/1.3 var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .05em;
  text-align: center;
  color: #14100a;
  background: var(--accent);
  padding: 2px 0;
}
.gallery-meta{ display: block; padding: 14px 16px 18px; }
.gallery-meta b{ display: block; font-size: 16px; margin-bottom: 4px; }
.gallery-meta span{ display: block; color: var(--ink-soft); font-size: 13.5px; line-height: 1.5; }
.gallery-empty{ text-align: center; color: var(--ink-soft); padding: 40px 0; }

.lightbox{
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(8,9,10,.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
}
.lightbox[hidden]{ display: none; }
.lightbox-box{
  position: relative;
  width: min(1040px, 100%);
  background: var(--panel);
  border: 1px solid var(--line-strong);
  padding: 22px;
  max-height: 100%;
  overflow-y: auto;
}
.lightbox-close{
  position: absolute;
  top: 6px; right: 10px;
  background: none; border: 0; color: var(--ink); font-size: 34px; line-height: 1; cursor: pointer;
}
.lightbox-images{ display: grid; gap: 14px; }
.lightbox-images.pair{ grid-template-columns: 1fr 1fr; }
.lightbox-figure{ margin: 0; text-align: center; }
.lightbox-figure img{ width: 100%; max-height: 62vh; object-fit: contain; display: block; background: var(--bg); }
.lightbox-figure figcaption{ font: 12px var(--font-mono); text-transform: uppercase; letter-spacing: .08em; color: var(--accent); padding-top: 8px; }
.lightbox-text{ padding: 16px 4px 4px; }
.lightbox-text b{ display: block; font-size: 20px; margin-bottom: 4px; }
.lightbox-text span{ color: var(--ink-soft); }
.lightbox-nav{ display: flex; justify-content: space-between; gap: 10px; padding-top: 16px; }
@media (max-width: 720px){
  .lightbox-images.pair{ grid-template-columns: 1fr; }
  .lightbox-figure img{ max-height: 40vh; }
}

/* account page: how many 3D generations are left */
.allowance{
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  padding: 18px 22px;
  margin: 0 0 30px;
}
.allowance .big{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 44px;
  line-height: 1;
  color: var(--accent);
}
.allowance .big small{ font-size: 20px; color: var(--ink-soft); font-weight: 600; }
.allowance .what{ flex: 1; min-width: 210px; }
.allowance .what b{ display: block; font-size: 17px; margin-bottom: 4px; }
.allowance .what span{ color: var(--ink-soft); font-size: 13.5px; line-height: 1.5; }
.allowance.empty .big{ color: #e0785c; }

.strip-title{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3vw, 36px);
  margin: 0 0 14px;
  letter-spacing: -.01em;
}
.section-head h2{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3vw, 36px);
  margin: 0 0 14px;
  letter-spacing: -.01em;
}
.section-head p{ color: var(--ink-soft); margin: 0; font-size: 16px; }
.nowrap-desktop{ white-space: nowrap; }
@media (max-width: 720px){
  .nowrap-desktop{ white-space: normal; }
}

/* ---------- who / intro ---------- */
.intro-grid{
  display: grid;
  grid-template-columns: 0.85fr 1fr;
  gap: 64px;
  align-items: center;
}
.intro-grid figure{
  margin: 0;
  border: 1px solid var(--line);
  padding: 8px;
  background: var(--panel);
}
.intro-grid img{ width: 100%; }
.intro-text p{ color: var(--ink-soft); margin: 0 0 16px; }
.intro-text p:last-child{ margin-bottom: 0; }

/* ---------- photo -> model -> print showcase ---------- */
.showcase-strip{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: nowrap;
}
.showcase-item{
  margin: 0;
  width: 297px;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 12px;
  text-align: center;
  flex-shrink: 0;
}
.showcase-item img{
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}
.showcase-item figcaption{
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-soft);
  padding: 16px 4px 8px;
}
.showcase-arrow{
  font-size: 33px;
  color: var(--accent);
  flex-shrink: 0;
}
/* middle card: a live 3D model (model-viewer) in place of the screenshot; the poster is that screenshot,
   the heavy file is only fetched when the visitor touches it (reveal="interaction") */
.showcase-live{ position: relative; width: 100%; aspect-ratio: 1 / 1; }
.showcase-live model-viewer{
  display: block;
  width: 100%;
  height: 100%;
  --poster-color: transparent;
  background: transparent;
  cursor: grab;
}
.showcase-live-badge{
  position: absolute;
  top: 8px;
  left: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: #14100a;
  background: var(--accent);
  padding: 3px 8px;
  pointer-events: none;
}
/* "Prova la demo" right under the three cards */
.demo-cta{ text-align: center; margin: 44px auto 0; }
.demo-cta p{ color: var(--ink-soft); max-width: 56ch; margin: 0 auto 20px; font-size: 16px; }
.demo-cta .btn-primary{ font-size: 15px; padding: 16px 38px; }
@media (max-width: 1100px){
  .showcase-strip{ flex-direction: column; flex-wrap: wrap; }
  .showcase-arrow{ transform: rotate(90deg); }
}

/* ---------- guida-consigli: esempi foto giuste/sbagliate ---------- */
.example-row-label{
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin: 28px 0 12px;
}
.example-row-label-ok{ color: var(--accent); }
.example-row-label-no{ color: #e0785c; }
.example-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.example-item{
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 6px;
}
.example-item img{
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  display: block;
}
.example-ok{ border-color: var(--accent-line); }
.example-no{ border-color: rgba(224,120,92,0.45); }
@media (max-width: 720px){
  .example-grid{ grid-template-columns: repeat(2, 1fr); }
}

/* ---------- process steps ---------- */
.process{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.step{
  background: var(--bg);
  padding: 32px 26px;
}
.step .num{
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 13px;
  margin-bottom: 18px;
}
.step h3{
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 10px;
}
.step p{ color: var(--ink-soft); margin: 0; font-size: 14.5px; }

.process-note{
  margin-top: 28px;
  padding: 18px 22px;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  font-size: 14px;
  color: var(--ink-soft);
}
.process-note b{ color: var(--ink); }
.prompt-box{
  margin: 12px 0;
  padding: 12px 14px;
  border: 1px solid var(--line, rgba(255,255,255,.14));
  background: rgba(0,0,0,.25);
}
.prompt-box .mono{ display: block; margin-bottom: 6px; color: var(--accent); }
.prompt-box code{
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink);
  user-select: all;
}

/* ---------- spec list ---------- */
.spec-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}
.spec-list div{
  display: flex;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
}
.spec-list div:last-child{ border-bottom: 0; }
.spec-list .k{
  font-family: var(--font-mono);
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: 12px;
}
.spec-copy h2{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 2.8vw, 32px);
  margin: 0 0 18px;
}
.spec-copy p{ color: var(--ink-soft); margin: 0; }

/* ---------- configurator teaser ---------- */
.cta-panel{
  border: 1px solid var(--line-strong);
  background: var(--panel);
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-panel h2{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 28px;
  margin: 0 0 10px;
}
.cta-panel p{ color: var(--ink-soft); margin: 0; max-width: 46ch; }

/* ---------- contact / footer ---------- */
#footer{ padding: 88px 0 40px; }
#footer .section-head{ margin-bottom: 40px; }
.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.field{ margin-bottom: 18px; }
.field label{
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 8px;
}
.field input, .field textarea{
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 14.5px;
}
.field input:focus, .field textarea:focus{
  outline: none;
  border-color: var(--accent-line);
}
.field textarea{ resize: vertical; }
.field input[readonly], .field textarea[readonly]{
  background: var(--bg-alt);
  border-color: var(--line);
  color: var(--ink-faint);
  cursor: default;
}
.field input[readonly]:focus, .field textarea[readonly]:focus{ border-color: var(--line); }
.contact-info dt{
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-faint);
  margin-bottom: 6px;
}
.contact-info dd{
  margin: 0 0 26px;
  font-size: 15px;
  color: var(--ink-soft);
}
.contact-info a:hover{ color: var(--accent); }
.foot-bottom{
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- app shell (login / register / create) ---------- */
.app-shell{
  min-height: calc(100vh - 71px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  position: relative;
}
.auth-card{
  width: 100%;
  max-width: 420px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  padding: 44px 40px;
}
.auth-card h1{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 26px;
  margin: 14px 0 8px;
}
.auth-card .sub{ color: var(--ink-soft); font-size: 14.5px; margin: 0 0 28px; }
.auth-card .kicker{ margin-bottom: 0; }
.auth-card form .field{ margin-bottom: 20px; }
.field-error{
  display: none;
  color: #e0785c;
  font-size: 13px;
  margin: -6px 0 16px;
}
.field-error.show{ display: block; }
.btn-block{ width: 100%; text-align: center; }
.hint-box{
  margin-top: 22px;
  padding: 16px 18px;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  font-size: 13.5px;
  color: var(--ink-soft);
}
.hint-box b{ color: var(--ink); }
.auth-foot{
  margin-top: 24px;
  font-size: 14px;
  color: var(--ink-soft);
}
.auth-foot a{ text-decoration: underline; font-weight: 600; color: var(--ink); }
.auth-foot a:hover{ color: var(--accent); }

/* ---------- creator page ---------- */
.panel-card{
  width: 100%;
  max-width: 620px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  padding: 48px;
}
.panel-card.wide{ max-width: 760px; }
.who{ color: var(--ink-soft); }
.who b{ color: var(--ink); }
.scale-select{
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}
.scale-option{
  flex: 1;
  border: 1px solid var(--line-strong);
  padding: 14px 16px;
  cursor: pointer;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.scale-option input{ display: none; }
.scale-option.active{
  border-color: var(--accent);
  color: var(--ink);
  background: var(--accent-soft);
}
.dropzone{
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px dashed var(--line-strong);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  color: var(--ink-soft);
  font-size: 14px;
  transition: border-color .15s ease, background .15s ease;
}
.dropzone:hover{ border-color: var(--accent-line); background: var(--accent-soft); }
.dropzone input{ display: none; }
.dropzone .dz-icon{ font-size: 28px; opacity: .7; }
.dropzone b{ color: var(--ink); }
.dropzone.has-file{ border-style: solid; border-color: var(--accent-line); }
.dz-preview{
  max-width: 100%;
  max-height: 220px;
  border: 1px solid var(--line);
}
.multiview-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.dropzone-small{ padding: 20px 12px; gap: 6px; font-size: 12px; }
.dropzone-small .dz-icon{ font-size: 18px; }
.dropzone-small .dz-preview{ max-height: 80px; }
@media (max-width: 560px){
  .multiview-grid{ grid-template-columns: 1fr; }
}
.sim-photo-card{
  background: #fff;
  border: 1px solid var(--line-strong);
  padding: 10px;
}
.sim-photo-card img{ display: block; width: 100%; }
.sim-photo-caption{
  margin: 16px 0 24px;
  font-size: 12.5px;
  color: var(--ink-faint);
  text-align: center;
}
.viewer-stage{
  width: 100%;
  height: 420px;
  border: 1px solid var(--line);
  background: var(--bg-alt);
  margin: 24px 0;
  position: relative;
  overflow: hidden;
}
.viewer-stage model-viewer{ width: 100%; height: 100%; }
.viewer-stage canvas{ display: block; width: 100%; height: 100%; touch-action: none; }
.viewer-hint{
  position: absolute;
  left: 12px;
  bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  pointer-events: none;
}

/* ---------- reference-model + grid controls ---------- */
.reference-controls{
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  margin: -8px 0 18px;
}
.reference-toggle{
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--ink-soft);
}
.reference-toggle .scale-select{ margin: 0; width: auto; }
/* I due pulsanti Scala H0/N restano affiancati anche sotto i 900px, dove
   .scale-select normalmente passa in colonna — le etichette sono corte e
   ci stanno comunque in riga. */
#pieceScaleToggle .scale-select{ flex-direction: row; }
.reference-toggle .scale-option{ padding: 6px 14px; font-size: 12px; white-space: nowrap; }
.grid-toggle{
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  cursor: pointer;
  user-select: none;
}
.grid-toggle input{ accent-color: var(--accent); }

/* ---------- size / price panel ---------- */
.size-panel{
  border: 1px solid var(--line-strong);
  background: var(--bg-alt);
  padding: 20px 22px;
  margin: 0 0 24px;
}
.size-panel .size-head{
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
}
.size-panel .size-head b{ color: #facc15; font-size: 15px; }
.size-slider{
  width: 100%;
  accent-color: var(--accent);
  margin-bottom: 8px;
}
.size-real-world{
  font-size: 13px;
  color: var(--ink-faint);
  margin-bottom: 14px;
}
.size-real-world b{
  color: var(--ink);
  font-weight: 700;
}
.price-estimate{
  font-size: 14.5px;
  color: var(--ink);
  margin-bottom: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.price-estimate b{ color: var(--accent); font-size: 17px; }
.price-estimate small{ display: block; color: var(--ink-faint); font-size: 12px; margin-top: 4px; }
.save-note{
  display: none;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent);
  margin: 14px 0 0;
}
.save-note.show{ display: block; }
.save-note.error{ color: #e0785c; }
.center-actions{
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 8px;
}
.spinner{
  width: 18px; height: 18px;
  border: 2px solid var(--line-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  display: inline-block;
  animation: ss-spin 0.8s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}
@keyframes ss-spin{ to{ transform: rotate(360deg); } }
.progress-note{
  text-align: center;
  color: var(--ink-soft);
  font-size: 14px;
  margin-top: 18px;
}
/* generating: the button greys out so it can't be pressed twice, and a clear progress card appears */
.btn-primary:disabled, .btn-primary:disabled:hover{
  background: #3a3f44;
  border-color: #3a3f44;
  color: #9a9fa4;
  cursor: wait;
}
.btn-primary .spinner{ width: 14px; height: 14px; margin-right: 10px; border-color: rgba(255,255,255,0.25); border-top-color: #cfd3d6; }
.progress-card{
  display: none;
  margin: 22px auto 0;
  max-width: 520px;
  padding: 26px 22px 22px;
  text-align: center;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
}
.progress-card .spinner-big{
  width: 64px; height: 64px;
  margin: 0 auto 16px;
  border: 5px solid var(--accent-soft);
  border-top-color: var(--accent);
  border-right-color: var(--accent);
  border-radius: 50%;
  animation: ss-spin 0.9s linear infinite;
}
.progress-card b{ display: block; font-size: 20px; color: var(--ink); margin-bottom: 6px; }
.progress-card .progress-sub{ font-size: 14px; color: var(--ink-soft); line-height: 1.5; }
.progress-card .progress-time{ font-family: var(--font-mono); font-size: 22px; letter-spacing: .08em; color: var(--accent); margin: 12px 0 2px; }
.progress-bar{ height: 5px; margin-top: 14px; background: rgba(255,255,255,0.10); overflow: hidden; position: relative; }
.progress-bar::after{
  content: ''; position: absolute; top: 0; bottom: 0; width: 35%;
  background: var(--accent);
  animation: ss-slide 1.4s ease-in-out infinite;
}
@keyframes ss-slide{ 0%{ left: -35%; } 100%{ left: 100%; } }

/* ---------- account page ---------- */
.name-row{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 520px){ .name-row{ grid-template-columns: 1fr; } }
.profile-saved{
  display: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent);
  font-weight: 600;
  margin: -8px 0 16px;
}
.profile-saved.show{ display: block; }
.empty-state{
  text-align: center;
  padding: 30px 0;
  color: var(--ink-faint);
  font-family: var(--font-mono);
  font-size: 13px;
}
.generation-item{
  border: 1px solid var(--line-strong);
  background: var(--bg-alt);
  padding: 16px 18px;
  margin-bottom: 12px;
}
.generation-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.generation-thumb{
  width: 56px;
  height: 56px;
  border: 1px solid var(--line);
  background: var(--bg-alt);
  object-fit: cover;
  flex-shrink: 0;
}
.generation-thumb-empty{ background-image: linear-gradient(135deg, var(--bg-alt) 25%, transparent 25%, transparent 50%, var(--bg-alt) 50%, var(--bg-alt) 75%, transparent 75%, transparent); background-size: 10px 10px; }
.generation-text{ flex: 1; min-width: 0; }
.generation-actions{ display: flex; gap: 8px; flex-shrink: 0; flex-wrap: wrap; justify-content: flex-end; }
.generation-item .row1{
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-weight: 600;
  margin-bottom: 6px;
}
.generation-item .row2{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
}
.status-model_ready{ color: var(--accent); }
.status-pending{ color: var(--ink-soft); }
.status-failed{ color: #e0785c; }
.generation-viewer{
  width: 100%;
  height: 300px;
  border: 1px solid var(--line);
  margin-top: 14px;
}
.generation-viewer model-viewer{ width: 100%; height: 100%; }

@media (max-width: 900px){
  .nav-links{
    /* Absolute (not fixed) on purpose: header is position:sticky and has
       backdrop-filter, which makes it the containing block for any
       position:fixed descendant — a fixed child with inset:…0 0 0 was being
       sized relative to header's own (tiny) box instead of the viewport,
       so the panel came out only ~60px tall and its lower links rendered
       with no painted background behind them. Anchoring with position:
       absolute + top:100% + height:auto sizes the panel to its own content
       and keeps it glued to the header (including while it's stuck), so
       every link always has the opaque background under it. */
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 32px;
    gap: 26px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .15s ease, transform .15s ease;
  }
  .nav-links.open{ opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav-toggle{ display: flex; }
  .nav-cta{ display: none; }
  .intro-grid, .spec-grid, .contact-grid{ grid-template-columns: 1fr; gap: 36px; }
  .process{ grid-template-columns: 1fr 1fr; }
  .cta-panel{ padding: 36px; }
  .auth-card, .panel-card{ padding: 32px 24px; }
  .scale-select{ flex-direction: column; }
}
@media (max-width: 560px){
  .process{ grid-template-columns: 1fr; }
  header nav{ padding: 16px 20px; }
  .wrap{ padding: 0 20px; }
  /* .generation-actions has flex-shrink:0, so its 3 buttons (Visualizza/
     Modifica/Elimina) never got squeezed enough to trigger their own
     flex-wrap — they just pushed the whole row past the viewport edge on
     phones. Wrapping the row itself lets the actions drop to their own
     full-width line instead, where they can wrap normally. */
  .generation-row{ flex-wrap: wrap; }
  .generation-actions{ flex-basis: 100%; justify-content: flex-start; margin-top: 10px; }
}