/* ============================================================
   NORDIC TIMBER HOMES — Industrial Swiss design system
   ============================================================ */

:root {
  /* Surfaces */
  --bg:        #0A0B0D;
  --surface:   #16181C;
  --surface-2: #1F2226;
  --surface-3: #2A2E33;

  /* Ink */
  --white:  #F4F4F2;
  --muted:  #8C9099;
  --faint:  #5A5E65;

  /* Lines */
  --line:        rgba(255,255,255,0.10);
  --line-strong: rgba(255,255,255,0.20);

  /* Accent */
  --accent:      #FF5A00;
  --accent-dim:  #C7460A;
  --on-accent:   #0A0B0D;

  /* Type */
  --sans: "Helvetica Neue", Helvetica, Arial, "Segoe UI", system-ui, sans-serif;
  --mono: "Space Mono", "SFMono-Regular", ui-monospace, Menlo, monospace;

  --maxw: 1320px;
  --gut:  clamp(20px, 4vw, 64px);
}

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

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

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--accent); color: var(--on-accent); }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
img { display: block; max-width: 100%; }

/* ---------- Layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gut); }

.section { position: relative; padding-block: clamp(72px, 11vw, 160px); }

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: "";
  width: 28px; height: 1px;
  background: var(--accent);
}
.eyebrow.muted { color: var(--muted); }
.eyebrow.muted::before { background: var(--faint); }

.label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Display type */
.display {
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 0.92;
  text-transform: uppercase;
  text-wrap: balance;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  padding: 18px 28px;
  border: 1px solid transparent;
  transition: transform .18s cubic-bezier(.2,.7,.3,1), background .18s, color .18s, border-color .18s;
  white-space: nowrap;
}
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(5px); }

.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--white); }

.btn-ghost { background: transparent; color: var(--white); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--white); background: rgba(255,255,255,0.04); }

.btn-block { width: 100%; }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10,11,13,0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled { border-bottom-color: var(--line); background: rgba(10,11,13,0.9); }
.nav-inner {
  height: 72px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 28px; height: 28px;
  border: 2px solid var(--accent);
  position: relative;
  flex: none;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 5px;
  background: var(--accent);
}
.brand-name {
  font-weight: 800; letter-spacing: 0.02em; font-size: 15px;
  text-transform: uppercase; line-height: 1;
}
.brand-name span { color: var(--muted); font-weight: 400; }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-link {
  font-family: var(--mono);
  font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); transition: color .15s;
}
.nav-link:hover { color: var(--white); }
.nav-cta { padding: 12px 20px; font-size: 12px; }

/* scroll progress */
.progress {
  position: absolute; left: 0; bottom: -1px; height: 2px;
  background: var(--accent);
  width: 0%;
}
.nav-burger { display: none; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-top: clamp(120px, 16vw, 180px);
  padding-bottom: clamp(40px, 6vw, 72px);
  overflow: hidden;
}
.hero-grid-bg {
  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;
  -webkit-mask-image: radial-gradient(120% 90% at 75% 0%, #000 0%, transparent 72%);
          mask-image: radial-gradient(120% 90% at 75% 0%, #000 0%, transparent 72%);
  opacity: .55;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(28px, 4vw, 64px);
  align-items: end;
}
.hero-headline {
  font-size: clamp(40px, 6vw, 90px);
  line-height: 1.04;
}
.hero-headline .accent { color: var(--accent); }
.hero-sub {
  margin-top: 30px;
  max-width: 30em;
  font-size: clamp(16px, 1.3vw, 19px);
  line-height: 1.55;
  color: var(--muted);
}
.hero-sub strong { color: var(--white); font-weight: 600; }
.hero-cta { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 14px; }

.hero-media { position: relative; align-self: stretch; min-height: 420px; }
.hero-meta {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 16px;
}
.hero-meta-item { font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: 0.04em; }
.hero-meta-item b { color: var(--muted); font-weight: 400; }

/* ---------- Placeholder ---------- */
.ph {
  position: relative;
  width: 100%; height: 100%;
  min-height: 200px;
  background:
    repeating-linear-gradient(135deg, rgba(255,255,255,0.035) 0 2px, transparent 2px 11px),
    var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
  display: flex; align-items: flex-end;
}
.ph::before {
  /* corner ticks */
  content: "";
  position: absolute; inset: 12px;
  border: 1px dashed var(--line);
  pointer-events: none;
}
.ph-img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 1;
  opacity: 0;
  filter: saturate(0.92) contrast(1.03) brightness(0.86);
  transition: opacity .6s ease;
}
.ph.has-img .ph-img { opacity: 1; }
.ph.has-img::before { opacity: 0; }                 /* hide dashed frame under photo */
.ph.has-img .ph-tag { display: none; }              /* hide placeholder label */
.ph.has-img .ph-coord {
  z-index: 2; color: var(--white);
  text-shadow: 0 1px 6px rgba(0,0,0,0.7);
  letter-spacing: 0.14em;
}
.ph.has-img::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, rgba(10,11,13,0.35) 0%, transparent 30%, transparent 60%, rgba(10,11,13,0.55) 100%);
  pointer-events: none;
}
.ph-tag {
  position: relative;
  margin: 18px;
  font-family: var(--mono);
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 7px 12px;
  display: inline-flex; align-items: center; gap: 9px;
}
.ph-tag::before { content: ""; width: 6px; height: 6px; background: var(--accent); flex: none; }
.ph-coord {
  position: absolute; top: 16px; right: 18px;
  font-family: var(--mono); font-size: 11px; color: var(--faint);
  letter-spacing: 0.1em;
}

/* ---------- Specs banner ---------- */
.specs {
  background: var(--surface);
  border-block: 1px solid var(--line);
}
.specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.spec {
  padding: clamp(36px, 5vw, 64px) clamp(22px, 2.6vw, 40px);
  border-left: 1px solid var(--line);
  position: relative;
}
.spec:first-child { border-left: none; }
.spec-idx { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: 0.2em; }
.spec-num {
  font-weight: 800; letter-spacing: -0.04em; line-height: 0.95;
  font-size: clamp(38px, 4.4vw, 62px);
  margin-top: 22px;
}
.spec-label { margin-top: 12px; color: var(--muted); font-size: 14px; letter-spacing: 0.01em; }

/* ---------- Section header ---------- */
.sec-head {
  display: grid; grid-template-columns: 1fr auto; gap: 28px;
  align-items: end;
  padding-bottom: clamp(36px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
}
.sec-title { font-size: clamp(34px, 4.6vw, 64px); margin-top: 22px; }
.sec-head-note { max-width: 26em; color: var(--muted); font-size: 15px; line-height: 1.55; }

/* ---------- Models ---------- */
.models { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--line); border-top: none; }
.model {
  position: relative;
  border-left: 1px solid var(--line);
  background: var(--bg);
  transition: background .25s;
  display: flex; flex-direction: column;
}
.model:first-child { border-left: none; }
.model:hover { background: var(--surface); }
.model-media { position: relative; height: 230px; border-bottom: 1px solid var(--line); }
.model-tag {
  position: absolute; top: 0; left: 0; z-index: 2;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
  background: var(--bg); color: var(--muted);
  padding: 8px 13px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.model-area {
  position: absolute; top: 0; right: 0; z-index: 2;
  font-family: var(--mono); font-weight: 700; font-size: 13px; letter-spacing: 0.06em;
  background: var(--accent); color: var(--on-accent);
  padding: 8px 14px;
}
/* keep the coordinate label clear of the orange area badge (top-right) */
.model-media .ph-coord { top: auto; bottom: 14px; right: 14px; }
.model-body { padding: clamp(24px, 2.4vw, 34px); display: flex; flex-direction: column; flex: 1; }
.model-name { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; line-height: 1.02; text-transform: uppercase; }
.model-desc { margin-top: 12px; color: var(--muted); font-size: 14px; line-height: 1.5; }

.model-specs {
  margin-top: 24px;
  display: grid; grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
}
.model-spec {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.model-spec:nth-child(odd) { padding-right: 14px; }
.model-spec:nth-child(even) { padding-left: 14px; border-left: 1px solid var(--line); }
.model-spec .k { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--faint); }
.model-spec .v { margin-top: 5px; font-size: 16px; font-weight: 600; }

/* hover reveal block */
.model-extra {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows .35s cubic-bezier(.2,.7,.3,1);
  overflow: hidden;
}
.model:hover .model-extra { grid-template-rows: 1fr; }
.model-extra-inner { overflow: hidden; }
.model-extra-list { padding-top: 18px; display: flex; flex-direction: column; gap: 10px; }
.model-extra-list li {
  list-style: none; display: flex; gap: 11px; align-items: center;
  font-size: 13.5px; color: var(--muted);
}
.model-extra-list li::before { content: ""; width: 7px; height: 7px; background: var(--accent); flex: none; }

.model-foot { margin-top: auto; padding-top: 26px; }
.model-price-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.model-price .k { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--faint); display:block; }
.model-price .v { font-size: 24px; font-weight: 800; letter-spacing: -0.02em; margin-top: 6px; }
.model-price .v small { font-size: 13px; font-weight: 400; color: var(--muted); margin-left: 4px; }

/* ---------- Process ---------- */
.process-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.step {
  padding: clamp(30px, 3vw, 48px) clamp(24px, 2.4vw, 40px) clamp(40px, 5vw, 70px);
  border-left: 1px solid var(--line);
  position: relative;
}
.step:first-child { border-left: none; }
.step-top { display: flex; align-items: center; justify-content: space-between; }
.step-idx { font-family: var(--mono); font-size: 13px; letter-spacing: 0.2em; color: var(--accent); }
.step-dot { width: 10px; height: 10px; border: 1px solid var(--line-strong); }
.step-bar { height: 2px; background: var(--line); margin-top: 22px; position: relative; overflow: hidden; }
.step-bar::after { content:""; position:absolute; left:0; top:0; bottom:0; width: 38%; background: var(--accent); }
.step:nth-child(2) .step-bar::after { width: 70%; }
.step:nth-child(3) .step-bar::after { width: 100%; }
.step-name { margin-top: 30px; font-size: 24px; font-weight: 800; letter-spacing: -0.02em; text-transform: uppercase; line-height: 1.05; }
.step-desc { margin-top: 14px; color: var(--muted); font-size: 15px; line-height: 1.55; }

/* ---------- Configurator ---------- */
.config { background: var(--surface); border-block: 1px solid var(--line); }
.config-shell {
  display: grid; grid-template-columns: 1.3fr 1fr;
  border: 1px solid var(--line);
  background: var(--bg);
}
.config-main { padding: clamp(28px, 3.4vw, 56px); border-right: 1px solid var(--line); }
.config-steps-nav { display: flex; gap: 0; margin-bottom: 40px; border: 1px solid var(--line); }
.config-step-tab {
  flex: 1; padding: 14px 10px; text-align: left;
  border-left: 1px solid var(--line);
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--faint); transition: color .2s, background .2s;
  display: flex; flex-direction: column; gap: 6px;
}
.config-step-tab:first-child { border-left: none; }
.config-step-tab .n { font-size: 16px; font-weight: 700; }
.config-step-tab.active { color: var(--white); background: var(--surface-2); }
.config-step-tab.done { color: var(--accent); }

.config-q { font-size: clamp(24px, 2.6vw, 34px); font-weight: 800; letter-spacing: -0.025em; text-transform: uppercase; line-height: 1.05; }
.config-hint { margin-top: 12px; color: var(--muted); font-size: 14px; }

.config-body { margin-top: 36px; min-height: 220px; }

/* slider */
.slider-val { display: flex; align-items: baseline; gap: 10px; }
.slider-val .big { font-size: clamp(44px, 6vw, 76px); font-weight: 800; letter-spacing: -0.04em; }
.slider-val .unit { font-family: var(--mono); color: var(--muted); font-size: 18px; }
.range { -webkit-appearance: none; appearance: none; width: 100%; height: 2px; background: var(--surface-3); margin-top: 30px; outline: none; }
.range::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 26px; height: 26px; background: var(--accent); border: 3px solid var(--bg); cursor: grab; }
.range::-moz-range-thumb { width: 22px; height: 22px; background: var(--accent); border: 3px solid var(--bg); cursor: grab; border-radius: 0; }
.range:active::-webkit-slider-thumb { cursor: grabbing; }
.range-scale { display: flex; justify-content: space-between; margin-top: 14px; font-family: var(--mono); font-size: 11px; color: var(--faint); letter-spacing: 0.08em; }

/* option cards */
.opts { display: grid; gap: 12px; }
.opt {
  display: flex; align-items: center; gap: 18px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  text-align: left; width: 100%;
  transition: border-color .18s, background .18s;
}
.opt:hover { border-color: var(--line-strong); }
.opt.sel { border-color: var(--accent); background: rgba(255,90,0,0.06); }
.opt-radio { width: 16px; height: 16px; border: 1px solid var(--line-strong); flex: none; position: relative; }
.opt.sel .opt-radio { border-color: var(--accent); }
.opt.sel .opt-radio::after { content:""; position:absolute; inset: 3px; background: var(--accent); }
.opt-text { flex: 1; }
.opt-text .t { font-size: 16px; font-weight: 600; }
.opt-text .d { font-size: 13px; color: var(--muted); margin-top: 3px; }
.opt-mult { font-family: var(--mono); font-size: 12px; color: var(--faint); letter-spacing: 0.06em; }

/* email */
.field { display: flex; flex-direction: column; gap: 10px; }
.field label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.input {
  width: 100%; padding: 18px 20px;
  background: var(--surface-2); border: 1px solid var(--line);
  color: var(--white); font-family: var(--sans); font-size: 16px;
  transition: border-color .18s;
}
.input::placeholder { color: var(--faint); }
.input:focus { outline: none; border-color: var(--accent); }
.input.err { border-color: #e0453a; }
.field-err { color: #ef6a5f; font-size: 12.5px; font-family: var(--mono); letter-spacing: 0.04em; }

.config-actions { margin-top: 38px; display: flex; gap: 12px; align-items: center; }
.btn-back { color: var(--muted); font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; padding: 16px 4px; transition: color .15s; }
.btn-back:hover { color: var(--white); }

/* summary panel */
.config-summary { padding: clamp(28px, 3.4vw, 56px); display: flex; flex-direction: column; background: var(--surface); }
.summary-price-label { font-family: var(--mono); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }
.summary-price {
  font-size: clamp(40px, 5vw, 60px); font-weight: 800; letter-spacing: -0.04em; line-height: 1;
  margin-top: 14px;
  font-variant-numeric: tabular-nums;
}
.summary-price .cur { font-size: 0.42em; color: var(--accent); margin-left: 6px; font-weight: 700; letter-spacing: 0; }
.summary-from { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: 0.1em; margin-top: 8px; }
.summary-rows { margin-top: 34px; border-top: 1px solid var(--line); }
.summary-row { display: flex; justify-content: space-between; gap: 14px; padding: 15px 0; border-bottom: 1px solid var(--line); }
.summary-row .k { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); }
.summary-row .v { font-size: 14px; font-weight: 600; text-align: right; }
.summary-note { margin-top: auto; padding-top: 30px; font-size: 12.5px; color: var(--faint); line-height: 1.5; }

.config-success { padding: clamp(40px, 6vw, 90px) clamp(28px, 3.4vw, 56px); text-align: left; }
.config-success .check { width: 56px; height: 56px; border: 2px solid var(--accent); display: flex; align-items: center; justify-content: center; margin-bottom: 28px; }
.config-success .check svg { width: 26px; height: 26px; }

/* ---------- Contact form ---------- */
.contact { border-top: 1px solid var(--line); background: var(--bg); }
.contact-grid {
  display: grid; grid-template-columns: 0.85fr 1.15fr;
  border: 1px solid var(--line);
}
.contact-aside { padding: clamp(32px, 3.4vw, 56px); border-right: 1px solid var(--line); display: flex; flex-direction: column; }
.contact-aside .sec-title { font-size: clamp(30px, 3.6vw, 50px); }
.contact-lead { margin-top: 22px; color: var(--muted); font-size: 15px; line-height: 1.6; max-width: 26em; }
.contact-points { margin-top: auto; padding-top: 40px; display: flex; flex-direction: column; }
.contact-point { display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; border-top: 1px solid var(--line); }
.contact-point .k { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--faint); }
.contact-point .v { font-size: 14px; font-weight: 600; text-align: right; }

.contact-form { padding: clamp(32px, 3.4vw, 56px); display: flex; flex-direction: column; gap: 22px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.textarea { resize: vertical; min-height: 120px; line-height: 1.5; font-family: var(--sans); }
.checkbox { display: flex; align-items: flex-start; gap: 13px; cursor: pointer; }
.checkbox input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.checkbox .box { width: 20px; height: 20px; border: 1px solid var(--line-strong); flex: none; margin-top: 1px; position: relative; transition: border-color .15s; }
.checkbox input:checked + .box { border-color: var(--accent); }
.checkbox input:checked + .box::after { content: ""; position: absolute; inset: 4px; background: var(--accent); }
.checkbox input:focus-visible + .box { outline: 2px solid var(--accent); outline-offset: 2px; }
.checkbox .ctext { font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.contact-submit { margin-top: 6px; }
.contact-success { padding: clamp(48px, 6vw, 96px) clamp(32px, 3.4vw, 56px); display: flex; flex-direction: column; }
.contact-success .check { width: 56px; height: 56px; border: 2px solid var(--accent); display: flex; align-items: center; justify-content: center; margin-bottom: 28px; }
.contact-success .check svg { width: 26px; height: 26px; }

/* ---------- Final CTA ---------- */
.final { position: relative; padding-block: clamp(90px, 13vw, 200px); overflow: hidden; border-top: 1px solid var(--line); }
.final-grid-bg {
  position: absolute; inset: 0;
  background-image: linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 88px 100%;
  opacity: .5; pointer-events: none;
}
.final-inner { position: relative; text-align: center; display: flex; flex-direction: column; align-items: center; }
.final-headline { font-size: clamp(40px, 6.4vw, 104px); line-height: 1.06; }
.final-headline .accent { color: var(--accent); }
.final-sub { margin-top: 26px; max-width: 34em; color: var(--muted); font-size: clamp(15px, 1.3vw, 18px); line-height: 1.55; }
.final-cta { margin-top: 44px; }
.final-cta .btn { padding: 22px 40px; font-size: 14px; }

/* ---------- Footer ---------- */
.footer { background: var(--surface); border-top: 1px solid var(--line); padding-block: clamp(56px, 7vw, 96px) 40px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: clamp(28px, 4vw, 64px); }
.footer-brand .brand { margin-bottom: 22px; }
.footer-blurb { color: var(--muted); font-size: 14px; line-height: 1.6; max-width: 26em; }
.footer-col h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--faint); margin-bottom: 20px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 13px; }
.footer-col li { font-size: 14px; color: var(--muted); line-height: 1.4; }
.footer-col a:hover { color: var(--white); }
.footer-col .strong { color: var(--white); font-weight: 600; }

.certs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.cert {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted); border: 1px solid var(--line); padding: 8px 11px;
}
.footer-bottom {
  margin-top: clamp(44px, 6vw, 80px); padding-top: 26px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap;
}
.footer-bottom .meta { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.06em; color: var(--faint); }
.socials { display: flex; gap: 10px; }
.social {
  width: 38px; height: 38px; border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; color: var(--muted);
  transition: border-color .15s, color .15s, background .15s;
}
.social:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .72s cubic-bezier(.2,.7,.3,1), transform .72s cubic-bezier(.2,.7,.3,1); transition-delay: var(--rd, 0ms); will-change: opacity, transform; }
.reveal.in { opacity: 1; transform: none; }
/* self-healing fallback: guarantees final state even if a transition stalls
   (render-throttled tabs / embedded viewers) — applied by JS shortly after reveal */
.reveal.show-now { opacity: 1 !important; transform: none !important; transition: none !important; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1080px) {
  .specs-grid { grid-template-columns: repeat(2, 1fr); }
  .spec:nth-child(3) { border-left: none; }
  .spec:nth-child(n+3) { border-top: 1px solid var(--line); }
}

@media (max-width: 920px) {
  /* mobile dropdown menu */
  .nav-links {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 6px var(--gut) 18px;
    background: rgba(10,11,13,0.97);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 17px 2px; font-size: 14px; border-bottom: 1px solid var(--line); }
  .nav-link:last-child { border-bottom: none; }

  .nav-burger {
    display: inline-flex; flex-direction: column; gap: 5px; padding: 10px; margin: -10px;
  }
  .nav-burger span { width: 22px; height: 2px; background: var(--white); display: block; transition: transform .25s, opacity .2s; }
  .nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-burger.open span:nth-child(2) { opacity: 0; }
  .nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-cta { display: none; }

  .hero-inner { grid-template-columns: 1fr; align-items: start; }
  .hero-media { min-height: 320px; order: -1; }

  .models { grid-template-columns: 1fr; border-top: 1px solid var(--line); }
  .model { border-left: none; border-top: 1px solid var(--line); }
  .model:first-child { border-top: none; }
  .model-extra { grid-template-rows: 1fr; }            /* always show on touch */

  .process-grid { grid-template-columns: 1fr; }
  .step { border-left: none; border-top: 1px solid var(--line); }
  .step:first-child { border-top: none; }

  .config-shell { grid-template-columns: 1fr; }
  .config-main { border-right: none; border-bottom: 1px solid var(--line); }
  .config-summary { order: -1; }

  .contact-grid { grid-template-columns: 1fr; }
  .contact-aside { border-right: none; border-bottom: 1px solid var(--line); }
  .form-row { grid-template-columns: 1fr; }

  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px 28px; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .specs-grid { grid-template-columns: 1fr; }
  .spec { border-left: none !important; border-top: 1px solid var(--line); }
  .spec:first-child { border-top: none; }

  .sec-head { grid-template-columns: 1fr; }
  .config-steps-nav { flex-wrap: wrap; }
  .config-step-tab { min-width: 50%; }
  .config-step-tab:nth-child(3) { border-left: none; }
  .footer-top { grid-template-columns: 1fr; }
  .hero-cta .btn { flex: 1; }
}