/* ============================================================
   GRASSROOTS AI LABS — v3
   Warm cream + gradient accents · Cartesia-adjacent
   Editorial serif + Geist + JetBrains Mono
   ============================================================ */

:root {
  --bg: #F6F3EA;
  --bg-white: #FFFFFF;
  --bg-card: #FDFBF5;
  --bg-hi: #EBE7D9;
  --bg-dark: #0F0F0E;
  --bg-dark-2: #1A1A18;

  --ink: #131311;
  --ink-soft: #3A3A35;
  --ink-inverse: #F6F3EA;
  --muted: #78766D;
  --muted-inverse: #928F84;
  --line: #DDD8CA;
  --line-strong: #B8B2A2;
  --line-dark: #2A2A28;

  --accent: #10B981;
  --accent-hi: #059669;
  --accent-glow: rgba(16, 185, 129, 0.28);
  --lime: #A3E635;
  --amber: #F59E0B;
  --plum: #A855F7;

  --grad-fresh: linear-gradient(135deg, #10B981 0%, #A3E635 60%, #F59E0B 100%);
  --grad-warm: linear-gradient(135deg, #F59E0B 0%, #F5764B 50%, #EF4444 100%);
  --grad-cool: linear-gradient(135deg, #10B981 0%, #06B6D4 50%, #6366F1 100%);
  --grad-band: linear-gradient(90deg, #10B981 0%, #A3E635 40%, #F59E0B 100%);

  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --max: 1280px;
  --pad-x: clamp(20px, 3.5vw, 52px);
  --section-pad: clamp(64px, 9vw, 128px);

  --transition: 0.28s cubic-bezier(0.25, 0.8, 0.25, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; background: var(--bg); }
body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
svg { height: auto; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
input, textarea, select { font: inherit; color: inherit; }
strong { font-weight: 600; color: var(--ink); }

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

/* ============ TYPOGRAPHY ============ */
.display-xl {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(56px, 9.5vw, 144px);
  line-height: 0.95;
  letter-spacing: -0.025em;
  color: var(--ink);
  max-width: 14ch;
}
.display-xl em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
  background: var(--grad-fresh);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lede-dark {
  font-family: var(--font-body);
  font-size: clamp(16px, 1.4vw, 20px);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 54ch;
  margin-top: clamp(28px, 4vw, 52px);
  font-weight: 400;
}

.prose-large { max-width: 68ch; }
.prose-large p {
  font-family: var(--font-body);
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.6;
  letter-spacing: -0.005em;
  color: var(--ink-soft);
  margin-bottom: 22px;
  font-weight: 400;
}
.prose-large p:nth-child(2) {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.2vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-top: 8px;
  margin-bottom: 28px;
}
.prose-large p:nth-child(2) strong {
  background: var(--grad-fresh);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 400;
  font-style: italic;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(32px, 4vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--ink);
  max-width: 24ch;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-transform: lowercase;
  color: var(--accent-hi);
  margin-bottom: 20px;
}
.section-label::before {
  content: '§';
  color: var(--accent);
  font-size: 13px;
  opacity: 0.7;
}

/* ============ LAYOUT ============ */
.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}
.section { padding-top: var(--section-pad); padding-bottom: 0; }
.section + .section { padding-top: clamp(56px, 7vw, 96px); }
.panel > .section:last-child { padding-bottom: var(--section-pad); }
.section-head { margin-bottom: clamp(36px, 5vw, 64px); }

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 243, 234, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 0.5px solid var(--line);
}
.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  min-height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark img { width: 30px; height: 30px; border-radius: 5px; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.brand-dot { color: var(--accent); margin: 0 1px; }
.brand-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--muted);
  margin-top: 4px;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
}
.nav-tab {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: lowercase;
  color: var(--muted);
  padding: 10px 14px;
  position: relative;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
  border-radius: 6px;
}
.nav-tab::before {
  color: var(--muted);
  opacity: 0.5;
  margin-right: 5px;
  transition: opacity var(--transition), color var(--transition);
  font-weight: 400;
}
.nav-tab:nth-child(1)::before { content: '[01]'; }
.nav-tab:nth-child(2)::before { content: '[02]'; }
.nav-tab:nth-child(3)::before { content: '[03]'; }
.nav-tab:nth-child(4)::before { content: '[04]'; }
.nav-tab:nth-child(5)::before { content: '[05]'; }
.nav-tab:hover { color: var(--ink); background: rgba(0,0,0,0.03); }
.nav-tab:hover::before { color: var(--accent); opacity: 1; }
.nav-tab.is-active { color: var(--accent-hi); background: rgba(16, 185, 129, 0.08); }
.nav-tab.is-active::before { color: var(--accent); opacity: 1; }

.nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}
.nav-toggle span {
  display: block; width: 20px; height: 1.5px;
  background: var(--ink); transition: var(--transition);
}

/* ============ PANELS ============ */
.panel { display: none; animation: fadeUp 0.6s cubic-bezier(0.2, 0.8, 0.2, 1); }
.panel.is-active { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============ HERO ============ */
.hero, .hero-dark {
  padding-top: clamp(72px, 10vw, 140px);
  padding-bottom: clamp(72px, 10vw, 140px);
  position: relative;
  overflow: hidden;
  background: var(--bg);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 45% at 8% 25%, var(--accent-glow) 0%, transparent 65%),
    radial-gradient(ellipse 55% 45% at 92% 85%, rgba(245, 158, 11, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 40% 35% at 60% 15%, rgba(163, 230, 53, 0.12) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.hero .container { position: relative; z-index: 1; }

.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(28px, 4vw, 44px);
  padding: 7px 14px 7px 11px;
  border: 0.5px solid var(--line-strong);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(8px);
}
.hero-meta .dot {
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.85); }
}
.hero-meta .label { color: var(--ink); }
.hero-meta .label::before {
  content: '>';
  color: var(--accent);
  margin-right: 5px;
  opacity: 0.8;
}

/* ============ ABOUT — PRINCIPLES bento ============ */
.principles-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 12px;
}
.principle {
  background: var(--bg-white);
  border: 0.5px solid var(--line);
  padding: clamp(28px, 3.5vw, 44px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
  border-radius: 6px;
}
.principle:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.principle:nth-child(1) { grid-column: 1 / 2; grid-row: 1 / 3; background: var(--bg-card); }
.principle:nth-child(2) { grid-column: 2 / 4; grid-row: 1 / 2; }
.principle:nth-child(3) { grid-column: 2 / 3; grid-row: 2 / 3; }
.principle:nth-child(4) { grid-column: 3 / 4; grid-row: 2 / 3; }
.principle::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 36px; height: 3px;
  background: var(--grad-band);
}
.pr-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--accent-hi);
  margin-bottom: 4px;
}
.pr-num::before { content: '// '; opacity: 0.5; }
.principle h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 52px);
  line-height: 1;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.principle p {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.principle:nth-child(1) h3 { font-size: clamp(36px, 4.5vw, 68px); }

/* ============ TRIAD ============ */
.triad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.triad-item {
  background: var(--bg-white);
  border: 0.5px solid var(--line);
  border-radius: 6px;
  padding: clamp(24px, 3vw, 36px);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
}
.triad-item:hover { transform: translateY(-2px); border-color: var(--accent); }
.triad-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-band);
}
.triad-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--accent-hi);
  margin-bottom: 14px;
}
.triad-tag::before { content: '// '; opacity: 0.6; }
.triad-item p {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.2vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 22ch;
}

/* ============ FLOW DIAGRAM ============ */
.flow-wrap {
  background: var(--bg-white);
  border: 0.5px solid var(--line);
  border-radius: 8px;
  padding: clamp(28px, 4vw, 56px);
  margin-bottom: clamp(48px, 6vw, 80px);
  position: relative;
  overflow: hidden;
}
.flow-wrap::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-band);
}
.flow-title {
  font-family: var(--font-display);
  font-size: clamp(24px, 2.8vw, 36px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: 8px;
  max-width: 28ch;
}
.flow-caption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  text-transform: lowercase;
  margin-bottom: clamp(32px, 4vw, 48px);
}
.flow-caption::before { content: '> '; color: var(--accent); }

.flow-svg {
  width: 100%;
  height: auto;
}
.flow-svg .phase-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  fill: var(--muted);
}
.flow-svg .phase-divider {
  stroke: var(--line);
  stroke-dasharray: 3 5;
  stroke-width: 1;
}
.flow-svg .flow-line {
  stroke: url(#flowGradient);
  stroke-width: 2;
  fill: none;
  opacity: 0.9;
}
.flow-svg .node-bg {
  fill: var(--bg-white);
  stroke: var(--line-strong);
  stroke-width: 1;
  transition: all var(--transition);
}
.flow-svg .node-primary .node-bg {
  fill: url(#nodeGradient);
  stroke: none;
}
.flow-svg .node-secondary .node-bg {
  fill: var(--bg-white);
  stroke: var(--accent);
  stroke-width: 2;
}
.flow-svg .node-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  fill: var(--muted);
}
.flow-svg .node-primary .node-num { fill: rgba(255,255,255,0.85); }
.flow-svg .node-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 400;
  fill: var(--ink);
  letter-spacing: -0.02em;
}
.flow-svg .node-primary .node-name { fill: white; }
.flow-svg .node-desc {
  font-family: var(--font-mono);
  font-size: 10.5px;
  fill: var(--muted);
  text-transform: lowercase;
}
.flow-svg .node-primary .node-desc { fill: rgba(255,255,255,0.75); }
.flow-svg .band-node .node-bg {
  fill: url(#bandGradient);
  stroke: none;
}
.flow-svg .band-node .node-num,
.flow-svg .band-node .node-name,
.flow-svg .band-node .node-desc {
  fill: white;
}
.flow-svg .band-node .node-name { fill: white; }

/* ============ PRODUCTS ============ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: clamp(48px, 6vw, 72px);
}
.product-card {
  background: var(--bg-white);
  border: 0.5px solid var(--line);
  border-radius: 6px;
  padding: clamp(32px, 4vw, 52px);
  display: flex;
  flex-direction: column;
  gap: 18px;
  transition: border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--line);
  transition: background var(--transition);
}
.product-card:nth-child(1)::before,
.product-card:nth-child(4)::before { background: var(--grad-fresh); }
.product-card:nth-child(2)::before,
.product-card:nth-child(5)::before { background: var(--grad-warm); }
.product-card:nth-child(3)::before,
.product-card:nth-child(6)::before { background: var(--grad-cool); }
.product-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.pc-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
}
.pc-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-hi);
  letter-spacing: 0.02em;
}
.pc-num::before { content: '//'; opacity: 0.5; margin-right: 5px; }
.pc-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  color: var(--muted);
  padding: 4px 10px;
  border: 0.5px solid var(--line-strong);
  border-radius: 3px;
}
.pc-name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(40px, 5.5vw, 76px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-top: 4px;
}
.pc-tagline {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--accent-hi);
  letter-spacing: 0;
  text-transform: lowercase;
}
.pc-tagline::before { content: '> '; opacity: 0.7; }
.pc-desc {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-soft);
  flex: 1;
}
.pc-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: 20px;
  border-top: 0.5px solid var(--line);
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
}
.pc-meta span { color: var(--muted); text-transform: lowercase; }
.pc-meta strong { color: var(--accent-hi); font-weight: 500; }

/* ============ CTA BAND ============ */
.cta-band {
  background: var(--bg-dark);
  color: var(--ink-inverse);
  padding: clamp(36px, 5vw, 56px) clamp(28px, 4vw, 52px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
  border-radius: 8px;
}
.cta-band::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-band);
}
.cta-band::after {
  content: '';
  position: absolute;
  top: -50%; right: -20%;
  width: 60%; height: 200%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 60%);
  pointer-events: none;
}
.cta-band p {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink-inverse);
  max-width: 32ch;
  position: relative;
  z-index: 1;
}

/* ============ BUTTONS ============ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--bg-dark);
  background: var(--grad-band);
  background-size: 200% 100%;
  background-position: 0% 50%;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  transition: background-position var(--transition), transform var(--transition), box-shadow var(--transition);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}
.btn-primary::before { content: '>'; opacity: 0.7; margin-right: 2px; }
.btn-primary:hover {
  background-position: 100% 50%;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.25);
}
.btn-primary span { transition: transform var(--transition); }
.btn-primary:hover span { transform: translateX(3px); }

/* ============ THOUGHT LEADERSHIP ============ */
.article-card {
  background: var(--bg-white);
  border: 0.5px solid var(--line);
  border-radius: 8px;
  margin-bottom: 20px;
  padding: 0;
  overflow: hidden;
}
.ac-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px clamp(28px, 3.5vw, 44px);
  background: var(--bg-hi);
  border-bottom: 0.5px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
}
.ac-num {
  color: var(--accent-hi);
  text-transform: lowercase;
}
.ac-num::before { content: '// '; opacity: 0.5; }
.ac-tag {
  color: var(--muted);
  text-transform: lowercase;
  padding: 3px 10px;
  border: 0.5px solid var(--line-strong);
  border-radius: 3px;
  margin-left: auto;
  background: var(--bg-white);
}
.ac-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(32px, 4.5vw, 60px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
  padding: clamp(32px, 4vw, 52px) clamp(28px, 3.5vw, 44px) 0;
  max-width: 22ch;
}
.ac-body {
  padding: clamp(24px, 3vw, 40px) clamp(28px, 3.5vw, 44px) clamp(32px, 4vw, 52px);
  max-width: 68ch;
}
.ac-body p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
  margin-bottom: 18px;
}
.ac-body p em {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--accent-hi);
  font-size: 1.08em;
  letter-spacing: -0.005em;
}
.ac-body strong { color: var(--ink); }
.ac-body ul { margin: 12px 0 24px; }
.ac-body li {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
  padding-left: 22px;
  position: relative;
  margin-bottom: 10px;
}
.ac-body li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ============ CASE STUDIES — Timeline ============ */
.case-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: clamp(24px, 4vw, 64px);
  padding: clamp(40px, 5vw, 64px) 0;
  border-top: 0.5px solid var(--line);
  position: relative;
}
.case-card:first-child { border-top: none; padding-top: 0; }
.case-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: sticky;
  top: 100px;
  align-self: start;
}
.case-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--accent-hi);
}
.case-num::before { content: '// '; opacity: 0.5; }
.case-product {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: white;
  padding: 5px 10px;
  background: var(--grad-band);
  border-radius: 3px;
  align-self: flex-start;
}
.case-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(28px, 3.6vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: clamp(24px, 3vw, 36px);
  max-width: 24ch;
}
.case-body {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(24px, 3vw, 36px);
}
.case-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.case-label::before { content: '> '; color: var(--accent); }
.case-col p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ============ CONTACT ============ */
.contact-split {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(48px, 6vw, 96px);
  align-items: start;
}
.contact-list > div {
  padding: 22px 0;
  border-bottom: 0.5px solid var(--line);
}
.contact-list > div:first-child { border-top: 3px solid transparent; border-image: var(--grad-band) 1; border-image-slice: 1; }
.contact-list dt {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.contact-list dt::before { content: '> '; color: var(--accent); }
.contact-list dd {
  font-family: var(--font-display);
  font-size: clamp(20px, 2vw, 28px);
  color: var(--ink);
  letter-spacing: -0.02em;
  font-weight: 400;
  line-height: 1.2;
}
.contact-list dd a { transition: color var(--transition); }
.contact-list dd a:hover { color: var(--accent-hi); }
.social-link {
  display: inline-block;
  margin-right: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 2px;
  text-transform: lowercase;
}
.social-link:hover { color: var(--accent-hi); border-bottom-color: var(--accent); }

/* ============ FORMS ============ */
.contact-form { margin-top: 8px; }
.field { margin-bottom: 22px; }
.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.field label::before { content: '> '; color: var(--accent); }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 13px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ink);
  background: var(--bg-white);
  border: 0.5px solid var(--line-strong);
  outline: none;
  transition: border-color var(--transition), background var(--transition);
  border-radius: 4px;
}
.field textarea { resize: vertical; min-height: 110px; font-family: var(--font-body); }
.field select { appearance: none; padding-right: 28px; cursor: pointer; }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--accent);
  background: var(--bg-white);
}
.contact-form .btn-primary { margin-top: 4px; }
.contact-success {
  margin-top: 16px;
  padding: 16px 20px;
  border: 0.5px solid var(--accent);
  background: rgba(16, 185, 129, 0.08);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
  border-radius: 4px;
}
.contact-success strong {
  font-family: var(--font-mono);
  font-weight: 500;
  display: block;
  margin-bottom: 4px;
  color: var(--accent-hi);
}

/* ============ FOOTER ============ */
.site-footer {
  background: var(--bg-dark);
  color: var(--muted-inverse);
  padding: clamp(40px, 5vw, 64px) 0 clamp(28px, 3vw, 40px);
  margin-top: clamp(56px, 7vw, 96px);
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad-band);
}
.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 32px;
  align-items: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-inverse);
}
.footer-brand img { border-radius: 3px; }
.footer-brand .brand-dot { color: var(--accent); }
.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--muted-inverse);
  text-align: center;
  text-transform: lowercase;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  color: var(--muted-inverse);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }

/* ============ RESPONSIVE ============ */
@media (max-width: 1100px) {
  .brand-sub { display: none; }
  .nav-tab { font-size: 11px; padding: 10px 10px; }
}
@media (max-width: 900px) {
  .principles-grid { grid-template-columns: 1fr; grid-template-rows: none; }
  .principle:nth-child(1),.principle:nth-child(2),.principle:nth-child(3),.principle:nth-child(4) { grid-column: auto; grid-row: auto; }
  .triad { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .contact-split { grid-template-columns: 1fr; }
  .case-card { grid-template-columns: 1fr; gap: 20px; }
  .case-head { position: static; flex-direction: row; align-items: center; }
  .case-body { grid-template-columns: 1fr; }
  .cta-band { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 800px) {
  .nav-toggle { display: flex; }
  .primary-nav {
    position: fixed;
    top: 72px; left: 0; right: 0; bottom: 0;
    background: var(--bg);
    flex-direction: column;
    align-items: stretch;
    padding: 32px var(--pad-x);
    gap: 0;
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
    z-index: 90;
    border-top: 0.5px solid var(--line);
  }
  .primary-nav.is-open { transform: translateX(0); }
  .nav-tab { text-align: left; padding: 18px 0; font-size: 15px; border-bottom: 0.5px solid var(--line); border-radius: 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 20px; text-align: center; }
  .footer-brand, .footer-links { justify-content: center; }
}
@media (max-width: 480px) { .brand-text { display: none; } .display-xl { font-size: 52px; } }