/* ─────────────────────────────────────────────
   PRODUCTREE LABS — style.css
   ───────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,400;12..96,500;12..96,600;12..96,700;12..96,800&family=Inter:wght@300;400;500;600&display=swap');

/* ── TOKENS — LIGHT ── */
:root {
  --bg:             #FFFFFF;
  --bg-subtle:      #FAFAFA;
  --bg-dark:        #0C0C0C;
  --surface:        #FFFFFF;
  --surface-raised: #F5F5F5;
  --text:           #0E0E0E;
  --text-muted:     #6B7280;
  --text-light:     #B0B0B0;
  --green:          #1E6B35;
  --green-mid:      #2E8A49;
  --green-light:    #EAF5ED;
  --green-glow:     rgba(30, 107, 53, 0.12);
  --border:         #EAEAEA;
  --border-subtle:  #F4F4F4;
  --radius-sm:      6px;
  --radius-md:      14px;
  --radius-lg:      20px;
  --max-w:          1120px;
  --nav-h:          64px;
  --font:           'Inter', system-ui, sans-serif;
  --font-display:   'Bricolage Grotesque', 'Inter', system-ui, sans-serif;
  --ease-out:       cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring:    cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── TOKENS — DARK ── */
[data-theme="dark"] {
  --bg:             #0A0A0A;
  --bg-subtle:      #101010;
  --bg-dark:        #050505;
  --surface:        #111111;
  --surface-raised: #161616;
  --text:           #EDEDED;
  --text-muted:     #808080;
  --text-light:     #404040;
  --green:          #4ADE80;
  --green-mid:      #22C55E;
  --green-light:    rgba(74, 222, 128, 0.07);
  --green-glow:     rgba(74, 222, 128, 0.18);
  --border:         #1A1A1A;
  --border-subtle:  #141414;
  color-scheme:     dark;
}

/* ── GLOBAL THEME TRANSITION ── */
html.theme-transitioning *,
html.theme-transitioning *::before,
html.theme-transitioning *::after {
  transition:
    background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    border-color     0.3s cubic-bezier(0.4, 0, 0.2, 1),
    color            0.3s cubic-bezier(0.4, 0, 0.2, 1),
    fill             0.3s cubic-bezier(0.4, 0, 0.2, 1),
    stroke           0.3s cubic-bezier(0.4, 0, 0.2, 1),
    box-shadow       0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }
img, svg { display: block; }

/* ── UTILITY ── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
  border-bottom: 1px solid transparent;
}
nav.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: var(--border);
}
[data-theme="dark"] nav.scrolled {
  background: rgba(10, 10, 10, 0.88);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
  gap: 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.nav-logo-icon { width: 26px; height: 26px; }
.nav-logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav-logo-text span:first-child {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.03em;
}
.nav-logo-text span:last-child {
  font-size: 9.5px;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.nav-links a {
  font-size: 13.5px;
  font-weight: 450;
  color: var(--text-muted);
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 1px;
  background: var(--text);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease-out);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { transform: scaleX(1); }

/* ── THEME TOGGLE ── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.2s var(--ease-out);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}
.theme-toggle:hover {
  background: var(--surface-raised);
  border-color: var(--text-light);
  color: var(--text);
  transform: scale(1.08);
}
.theme-toggle svg {
  position: absolute;
  transition: opacity 0.25s, transform 0.3s var(--ease-out);
}
.theme-toggle .icon-sun  { opacity: 1;  transform: rotate(0deg) scale(1); }
.theme-toggle .icon-moon { opacity: 0;  transform: rotate(-25deg) scale(0.7); }
[data-theme="dark"] .theme-toggle .icon-sun  { opacity: 0;  transform: rotate(25deg) scale(0.7); }
[data-theme="dark"] .theme-toggle .icon-moon { opacity: 1;  transform: rotate(0deg) scale(1); }

/* ── HERO ── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
}
/* Subtle dot grid background */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.5;
  pointer-events: none;
}
[data-theme="dark"] #hero::before { opacity: 0.35; }
/* Fade the grid at bottom */
#hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg), transparent);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 80px;
  padding: 100px 40px 80px;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}
.hero-left { max-width: 540px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 28px;
  opacity: 0;
  transform: translateY(10px);
  animation: fadeUp 0.7s var(--ease-out) 0.1s forwards;
}
.eyebrow-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse-dot 2.5s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.6; }
}
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(46px, 6.5vw, 76px);
  font-weight: 750;
  letter-spacing: -0.04em;
  line-height: 1.0;
  margin-bottom: 22px;
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 0.85s var(--ease-out) 0.2s forwards;
}
.hero-headline .accent {
  color: var(--green);
  font-style: italic;
}
.hero-sub {
  font-size: 16.5px;
  font-weight: 400;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 420px;
  margin-bottom: 44px;
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 0.85s var(--ease-out) 0.35s forwards;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 0.85s var(--ease-out) 0.47s forwards;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--text);
  color: var(--bg);
  font-family: var(--font);
  font-size: 13.5px;
  font-weight: 500;
  padding: 11px 22px;
  border-radius: 100px;
  transition: transform 0.2s var(--ease-out), box-shadow 0.2s, background 0.2s;
  letter-spacing: -0.01em;
}
.btn-primary:hover {
  background: var(--green);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--green-glow);
}
[data-theme="dark"] .btn-primary:hover { color: #0A0A0A; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 11px 6px;
  transition: color 0.2s;
  letter-spacing: -0.01em;
}
.btn-ghost:hover { color: var(--text); }
.btn-arrow { transition: transform 0.2s var(--ease-out); }
.btn-ghost:hover .btn-arrow { transform: translateX(4px); }

/* ── HERO TREE ── */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  animation: fadeIn 1s var(--ease-out) 0.55s forwards;
}
#hero-tree {
  width: 100%;
  max-width: 460px;
  height: auto;
  overflow: visible;
}
/* Dark mode tree glow on branch nodes */
[data-theme="dark"] .branch-glow {
  filter: drop-shadow(0 0 10px rgba(74, 222, 128, 0.35));
}
/* Dark mode SVG color overrides via CSS */
[data-theme="dark"] .tree-root-node  { fill: #E8E8E8; }
[data-theme="dark"] .tree-branch-node { fill: var(--green); }
[data-theme="dark"] .tree-leaf-node  { fill: #1E1E1E; stroke: #2A2A2A; }
[data-theme="dark"] .tree-edge       { stroke: #242424; }
[data-theme="dark"] .tree-edge-light { stroke: #181818; }
[data-theme="dark"] .root-label      { fill: #D0D0D0; }
[data-theme="dark"] .branch-label    { fill: var(--green); }
[data-theme="dark"] .leaf-label      { fill: #383838; }

/* ── SECTION BASE ── */
section { padding: 120px 0; }
.section-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 14px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 750;
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 500px;
}

/* ── WHAT WE BUILD — EDITORIAL ROWS ── */
#build { border-top: 1px solid var(--border); }
.build-header { margin-bottom: 72px; }
.build-list { display: flex; flex-direction: column; }
.build-item {
  display: grid;
  grid-template-columns: 52px 1fr max-content;
  gap: 40px;
  align-items: start;
  padding: 44px 0;
  border-top: 1px solid var(--border);
  cursor: default;
  transition: opacity 0.25s;
}
.build-item:last-child { border-bottom: 1px solid var(--border); }
.build-item:hover { opacity: 0.55; }
.build-num {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: 0.08em;
  padding-top: 7px;
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
}
.build-body { max-width: 540px; }
.build-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 12px;
}
.build-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.65;
}
.build-tag {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: 0.05em;
  padding-top: 7px;
  white-space: nowrap;
  text-align: right;
}

/* ── PRODUCTS ── */
#products { border-top: 1px solid var(--border); }
.products-header { margin-bottom: 64px; }
/* 3-col grid using 1px gap trick for clean lines */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.product-card {
  background: var(--surface);
  padding: 40px 36px;
  position: relative;
  transition: background 0.2s;
  cursor: default;
}
.product-card:hover { background: var(--bg-subtle); }
[data-theme="dark"] .product-card:hover { background: var(--surface-raised); }
/* Subtle top line appears on hover */
.product-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.product-card:hover::after { transform: scaleX(1); }

.product-status-row {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 28px;
}
.status-indicator {
  width: 6px; height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  animation: pulse 2.2s ease-in-out infinite;
}
.status-indicator.dev    { background: var(--green); }
.status-indicator.res    { background: #818CF8; }
.status-indicator.early  { background: #FBBF24; }
.product-status-text {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
}
.product-category {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 10px;
}
.product-name {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 12px;
}
.product-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── PHILOSOPHY (DARK) ── */
#philosophy {
  background: var(--bg-dark);
  padding: 150px 0;
}
.philosophy-inner { max-width: 820px; }
.philosophy-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #2E2E2E;
  margin-bottom: 56px;
}
[data-theme="dark"] .philosophy-label { color: #2A2A2A; }

/* Masked line-by-line text reveal */
.p-line {
  overflow: hidden;
  line-height: 1.22;
}
.p-line-inner {
  display: block;
  transform: translateY(105%);
  transition: transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}
.p-line.revealed .p-line-inner { transform: translateY(0); }
/* Stagger delays */
.p-line:nth-child(1) .p-line-inner { transition-delay: 0s; }
.p-line:nth-child(2) .p-line-inner { transition-delay: 0.07s; }
.p-line:nth-child(3) .p-line-inner { transition-delay: 0.14s; }
.p-line:nth-child(4) .p-line-inner { transition-delay: 0.21s; }

.philosophy-statement {
  font-family: var(--font-display);
  font-size: clamp(28px, 4.5vw, 52px);
  font-weight: 600;
  letter-spacing: -0.035em;
  color: #FFFFFF;
  margin-bottom: 56px;
}
.philosophy-statement em {
  font-style: italic;
  color: #5BF07A;
}
[data-theme="dark"] .philosophy-statement em { color: var(--green); }

.philosophy-divider {
  width: 40px; height: 1px;
  background: #282828;
  margin-bottom: 40px;
}
.philosophy-detail {
  font-size: 16px;
  color: #4A4A4A;
  line-height: 1.75;
  max-width: 560px;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.8s var(--ease-out) 0.4s, transform 0.8s var(--ease-out) 0.4s;
}
.philosophy-detail.revealed { opacity: 1; transform: translateY(0); }
[data-theme="dark"] .philosophy-detail { color: #3A3A3A; }

/* ── ABOUT / CONTACT ── */
#about { border-top: 1px solid var(--border); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: start;
}
.about-left .section-title { margin-bottom: 20px; }
.about-desc {
  font-size: 15.5px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 28px;
}
.contact-links { display: flex; flex-direction: column; }
.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s, gap 0.25s var(--ease-out);
}
.contact-link:first-child { border-top: 1px solid var(--border); }
.contact-link:hover { color: var(--green); gap: 16px; }
.contact-link-icon { flex-shrink: 0; transition: color 0.2s; }
.contact-link-arrow {
  margin-left: auto;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s, transform 0.25s var(--ease-out);
  flex-shrink: 0;
}
.contact-link:hover .contact-link-arrow { opacity: 1; transform: translateX(0); }

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.footer-logo-icon { width: 18px; height: 18px; }
.footer-copy { font-size: 12.5px; color: var(--text-light); }
.footer-links { display: flex; gap: 24px; list-style: none; }
.footer-links a {
  font-size: 12.5px;
  color: var(--text-light);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--text); }

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  to { opacity: 1; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

/* ── DARK MODE — LOGO SVG ── */
[data-theme="dark"] .nav-logo-icon circle,
[data-theme="dark"] .footer-logo-icon circle { fill: var(--text); }
[data-theme="dark"] .nav-logo-icon line,
[data-theme="dark"] .footer-logo-icon line { stroke: var(--text); }

/* ─────────────────────────────────────────
   HERO TREE — animation system
   ───────────────────────────────────────── */

/* Critical: makes transform-origin work correctly on SVG elements */
#hero-tree .t-node,
#hero-tree .t-glow-ring,
#hero-tree .t-pulse-ring {
  transform-box: fill-box;
  transform-origin: center;
}

/* Initial hidden state — JS animates these in */
#hero-tree .t-node {
  opacity: 0;
  transform: scale(0.1);
  transition: opacity 0.4s ease, transform 0.55s cubic-bezier(0.34, 1.56, 0.64, 1);
}
#hero-tree .t-node.t-in {
  opacity: 1;
  transform: scale(1);
}

/* Glow rings — fade only, no scale */
#hero-tree .t-glow-ring {
  opacity: 0;
  transition: opacity 0.7s ease;
}
#hero-tree .t-glow-ring.t-in { opacity: 0.06; }
[data-theme="dark"] #hero-tree .t-glow-ring.t-in { opacity: 0.14; }

/* Labels — fade in last */
#hero-tree .t-label {
  opacity: 0;
  transition: opacity 0.55s ease;
}
#hero-tree .t-label.t-in { opacity: 1; }

/* Inner dot — no animation, but hidden until root animates in */
#hero-tree .t-inner-dot { opacity: 0; transition: opacity 0.4s ease 0.05s; }
#hero-tree .t-inner-dot.t-in { opacity: 0.18; }

/* Pulse ring — CSS animation, starts after tree is built */
@keyframes tree-pulse {
  0%   { transform: scale(1);   opacity: 0.35; }
  100% { transform: scale(2.4); opacity: 0; }
}
#hero-tree .t-pulse-ring {
  opacity: 0;
  /* animation starts via JS adding .t-pulsing class */
}
#hero-tree .t-pulse-ring.t-pulsing {
  animation: tree-pulse 3s ease-out infinite;
}

/* ── DARK MODE TREE ── */
[data-theme="dark"] #hero-tree .tree-edge { stroke: #222222; }
[data-theme="dark"] #hero-tree .t-root    { fill: #E8E8E8; }
[data-theme="dark"] #hero-tree .t-branch  {
  fill: var(--green);
  filter: drop-shadow(0 0 10px rgba(74, 222, 128, 0.35));
}
[data-theme="dark"] #hero-tree .t-leaf    { stroke: #282828; fill: transparent; }
[data-theme="dark"] #hero-tree .t-inner-dot { fill: #0A0A0A; opacity: 0.4; }
[data-theme="dark"] #hero-tree .t-pulse-ring { stroke: var(--green); }
[data-theme="dark"] #hero-tree .t-label-root   { fill: #D8D8D8; }
[data-theme="dark"] #hero-tree .t-label-branch { fill: var(--green); }
[data-theme="dark"] #hero-tree .t-label-leaf   { fill: #303030; }


/* ── DARK SCROLLBAR ── */
[data-theme="dark"] ::-webkit-scrollbar { width: 5px; }
[data-theme="dark"] ::-webkit-scrollbar-track { background: #0A0A0A; }
[data-theme="dark"] ::-webkit-scrollbar-thumb { background: #222; border-radius: 4px; }
[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: #333; }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 56px; padding: 72px 24px 64px; }
  .hero-visual { order: -1; }
  #hero-tree { max-width: 320px; margin: 0 auto; }
  .build-item { grid-template-columns: 40px 1fr; }
  .build-tag { display: none; }
  .products-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 56px; }
}
@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }
  section { padding: 80px 0; }
  .hero-inner { padding: 64px 20px 56px; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .build-item { grid-template-columns: 1fr; gap: 12px; padding: 32px 0; }
  .build-num { padding-top: 0; }
  .products-grid { border-radius: var(--radius-md); }
  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
  .footer-links { justify-content: center; }
}