/* =========================================================================
   Zook Tech — website
   Obsidian / Ember / Paper palette · Inter + JetBrains Mono
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --obsidian:    #0E1116;
  --obsidian-2:  #141820;
  --obsidian-3:  #1C212B;
  --ember:       #E2541C;
  --ember-deep:  #BC3F0C;
  --paper:       #F7F4ED;
  --graphite:    #5A5C60;
  --graphite-2:  #8A8C92;
  --mist:        #E5E3DD;
  --mist-2:      #EFEDE7;

  --fg-inverse:    var(--paper);
  --fg-inverse-2:  #B9BBC0;
  --fg-inverse-3:  #7A7D84;

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 24px; --sp-6: 32px; --sp-7: 48px; --sp-8: 64px;
  --sp-9: 96px; --sp-10: 128px; --sp-11: 192px;

  --radius-1: 4px;
  --radius-2: 8px;
  --radius-3: 14px;
  --radius-pill: 999px;

  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --dur-2: 200ms;
  --dur-3: 320ms;

  --container: 1280px;
}

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

html, body { margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--obsidian);
  color: var(--paper);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--ember); color: var(--paper); }

a { color: inherit; text-decoration: none; }

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

button { font-family: inherit; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--sp-6);
  padding-right: var(--sp-6);
}

/* ---------- Wordmark ---------- */
.wm {
  font-family: var(--font);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
  display: inline-block;
  color: var(--paper);
}
.wm .s { color: var(--ember); font-weight: 400; padding: 0 0.02em; }
.paper .wm { color: var(--obsidian); }

/* ---------- Type ---------- */
.display {
  font-size: clamp(64px, 12vw, 180px);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.96;
}
.h1 { font-size: clamp(44px, 6vw, 88px); font-weight: 500; letter-spacing: -0.035em; line-height: 1.02; }
.h2 { font-size: clamp(32px, 4.2vw, 56px); font-weight: 500; letter-spacing: -0.03em; line-height: 1.06; }
.h3 { font-size: clamp(24px, 2.6vw, 36px); font-weight: 500; letter-spacing: -0.02em; line-height: 1.15; }
.h4 { font-size: clamp(19px, 1.6vw, 24px); font-weight: 600; letter-spacing: -0.01em; line-height: 1.25; }

.lead { font-size: clamp(18px, 1.5vw, 22px); line-height: 1.5; font-weight: 400; color: var(--fg-inverse-2); }
.lead-lg { font-size: clamp(20px, 1.8vw, 26px); line-height: 1.45; font-weight: 400; color: var(--fg-inverse-2); }
.paper .lead, .paper .lead-lg { color: var(--graphite); }

.body { font-size: 17px; line-height: 1.65; color: var(--fg-inverse-2); }
.paper .body { color: var(--graphite); }

.mono {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  font-weight: 500;
}

.muted { color: var(--fg-inverse-2); }
.paper .muted { color: var(--graphite); }
.dim { color: var(--fg-inverse-3); }
.paper .dim { color: var(--graphite-2); }
.ember { color: var(--ember); }

/* ---------- Section label ---------- */
.sec-label {
  display: inline-flex; align-items: center; gap: 14px;
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--fg-inverse-2);
  text-transform: none;
}
.sec-label::before {
  content: ''; width: 22px; height: 2px; background: var(--ember); flex-shrink: 0;
}
.sec-label .k { color: var(--paper); font-weight: 500; }
.paper .sec-label { color: var(--graphite); }
.paper .sec-label .k { color: var(--obsidian); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font); font-size: 14px; font-weight: 600;
  padding: 13px 20px; border-radius: var(--radius-2);
  cursor: pointer; border: 1px solid transparent;
  transition: background var(--dur-2) var(--ease), color var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
  text-decoration: none;
  letter-spacing: -0.005em;
}
.btn-primary { background: var(--ember); color: var(--paper); }
.btn-primary:hover { background: var(--ember-deep); }

.btn-ghost { background: transparent; color: var(--paper); border-color: var(--obsidian-3); }
.btn-ghost:hover { border-color: var(--fg-inverse-3); }

.paper .btn-ghost { color: var(--obsidian); border-color: #D6D3CB; }
.paper .btn-ghost:hover { border-color: var(--obsidian); }

.btn .arrow { transition: transform var(--dur-2) var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14, 17, 22, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--obsidian-3);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: var(--sp-6);
}
.nav-left { display: flex; align-items: center; gap: var(--sp-7); }
.nav-brand {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--paper);
}
.nav-brand .s { color: var(--ember); font-weight: 400; }

.nav-links { display: flex; gap: var(--sp-6); }
.nav-links a {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-inverse-2);
  letter-spacing: 0.02em;
  transition: color var(--dur-2) var(--ease);
}
.nav-links a:hover { color: var(--paper); }

.nav-cta { display: flex; align-items: center; gap: var(--sp-4); }

.nav-mono {
  font-family: var(--mono); font-size: 12px; color: var(--fg-inverse-3);
  letter-spacing: 0.02em;
}
.nav-mono .dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--ember); margin-right: 8px; vertical-align: middle;
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@media (max-width: 820px) {
  .nav-links, .nav-mono { display: none; }
}

/* ---------- Chrome (top/bottom mono labels) ---------- */
.chrome {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.02em;
  color: var(--fg-inverse-3);
  padding: var(--sp-5) 0;
  border-bottom: 1px solid var(--obsidian-3);
}
.chrome .kicker { color: var(--ember); font-weight: 500; }
.paper .chrome { border-bottom-color: var(--mist); color: var(--graphite); }
.paper .chrome .kicker { color: var(--ember); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: var(--sp-10) 0 var(--sp-11);
  overflow: hidden;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 40%, transparent 100%);
  pointer-events: none;
}
.hero-inner { position: relative; }
.hero .sec-label { margin-bottom: var(--sp-7); }
.hero-wm {
  font-size: clamp(88px, 18vw, 280px);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 0.9;
  color: var(--paper);
  margin: 0;
}
.hero-wm .s { color: var(--ember); font-weight: 400; }

.hero-tag {
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.45;
  color: var(--fg-inverse-2);
  max-width: 680px;
  margin-top: var(--sp-7);
  font-weight: 400;
}

.hero-actions { display: flex; gap: var(--sp-4); flex-wrap: wrap; margin-top: var(--sp-7); }

.hero-meta {
  display: flex; gap: var(--sp-7); flex-wrap: wrap;
  margin-top: var(--sp-9);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--obsidian-3);
  font-family: var(--mono); font-size: 12px; color: var(--fg-inverse-3);
  letter-spacing: 0.02em;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 10px; }
.hero-meta span::before { content: ''; width: 4px; height: 4px; border-radius: 50%; background: var(--ember); }

/* ---------- Section ---------- */
section.section {
  padding: var(--sp-11) 0;
  position: relative;
}
section.paper {
  background: var(--paper);
  color: var(--obsidian);
}
.section-head {
  display: flex; flex-direction: column; gap: var(--sp-6);
  margin-bottom: var(--sp-9);
  max-width: 900px;
}

/* ---------- Services grid ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto auto auto;
  gap: 1px;
  background: var(--mist);
  border-top: 1px solid var(--mist);
  border-bottom: 1px solid var(--mist);
}
.service {
  background: var(--paper);
  padding: var(--sp-8) var(--sp-6);
  display: grid;
  grid-template-rows: subgrid;
  grid-row: span 4;
  row-gap: var(--sp-5);
  transition: background var(--dur-3) var(--ease);
}
.service:hover { background: #FFFFFF; }
.service > * { margin: 0; align-self: start; }
.service .num {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  color: var(--ember); letter-spacing: 0.02em;
}
.service h3 { color: var(--obsidian); }
.service p { color: var(--graphite); font-size: 16px; line-height: 1.6; }
.service ul {
  list-style: none; padding: 0;
  font-family: var(--mono); font-size: 12px;
  color: var(--graphite); letter-spacing: 0.02em;
  align-self: stretch;
}
.service ul li {
  padding: 8px 0; border-top: 1px solid var(--mist);
}
.service ul li:first-child { border-top: 1px solid #D6D3CB; }

@media (max-width: 900px) {
  .services-grid { grid-template-columns: 1fr; grid-template-rows: none; }
  .service { grid-template-rows: none; grid-row: auto; }
}

/* ---------- Stats ---------- */
.stats-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
  margin-top: var(--sp-8);
}
.stat {
  border-top: 2px solid var(--obsidian-3);
  padding-top: var(--sp-6);
}
.stat-num {
  font-size: clamp(64px, 10vw, 140px);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 0.9;
  color: var(--paper);
}
.stat-num .ember { color: var(--ember); }
.stat-label {
  font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--fg-inverse-2);
  margin-top: var(--sp-5);
  max-width: 260px;
  line-height: 1.5;
}

@media (max-width: 820px) {
  .stats-grid { grid-template-columns: 1fr; gap: var(--sp-7); }
}

/* ---------- Quote ---------- */
.quote-wrap { padding: var(--sp-11) 0; }
.quote {
  font-size: clamp(48px, 8vw, 120px);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1;
  max-width: 1100px;
  margin: 0;
}
.quote .ember { color: var(--ember); }
.quote-footer {
  margin-top: var(--sp-7);
  color: var(--graphite);
  max-width: 700px;
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.5;
}

/* ---------- Compare ---------- */
.compare-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--sp-5);
  margin-top: var(--sp-8);
}
.compare-col {
  border-radius: var(--radius-3);
  padding: var(--sp-7);
  display: flex; flex-direction: column; gap: var(--sp-4);
}
.compare-col.neg {
  background: var(--obsidian-2);
  border: 1px solid var(--obsidian-3);
  color: var(--paper);
}
.compare-col.pos {
  background: var(--paper);
  color: var(--obsidian);
}
.compare-col .label {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.02em; color: var(--fg-inverse-2);
}
.compare-col.pos .label { color: var(--ember); }
.compare-col h4 { margin: var(--sp-2) 0 var(--sp-5); }
.compare-col ul {
  list-style: none; padding: 0; margin: 0;
  font-size: 16px; line-height: 1.55;
}
.compare-col ul li { padding: var(--sp-3) 0; border-top: 1px solid var(--obsidian-3); }
.compare-col.neg ul li { color: var(--fg-inverse-2); }
.compare-col.pos ul li { border-top-color: var(--mist); color: var(--graphite); }

@media (max-width: 820px) {
  .compare-grid { grid-template-columns: 1fr; }
}

/* ---------- Process ---------- */
.process { position: relative; margin-top: var(--sp-8); }
.process-rail {
  position: absolute; top: 20px; left: 20px; right: 20px; height: 1px;
  background: var(--obsidian-3);
  z-index: 0;
}
.process-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-6);
  position: relative; z-index: 1;
}
.step .num {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--obsidian);
  border: 2px solid var(--ember);
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 13px; font-weight: 600;
  color: var(--ember);
}
.step:last-child .num { background: var(--ember); color: var(--paper); }
.step h4 { margin: var(--sp-6) 0 var(--sp-3); }
.step p { margin: 0; font-size: 15px; color: var(--fg-inverse-2); line-height: 1.55; }

@media (max-width: 900px) {
  .process-grid { grid-template-columns: 1fr 1fr; }
  .process-rail { display: none; }
}
@media (max-width: 560px) {
  .process-grid { grid-template-columns: 1fr; }
}

/* ---------- Contact / CTA ---------- */
.cta {
  padding: var(--sp-11) 0;
  border-top: 1px solid var(--obsidian-3);
}
.cta .display { margin: var(--sp-6) 0 0; max-width: 1200px; }
.cta .display .ember { color: var(--ember); }

.contact-grid {
  display: grid; grid-template-columns: auto auto auto;
  gap: var(--sp-9);
  margin-top: var(--sp-9);
  align-items: end;
  flex-wrap: wrap;
}
.contact-item .label {
  font-family: var(--mono); font-size: 12px; color: var(--fg-inverse-2);
  letter-spacing: 0.02em; margin-bottom: var(--sp-3);
}
.contact-item .val {
  font-size: clamp(22px, 2.6vw, 36px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--paper);
}
.contact-item .val.ember { color: var(--ember); }
.contact-item .val a { color: inherit; border-bottom: 1px solid transparent; transition: border-color var(--dur-2) var(--ease); }
.contact-item .val a:hover { border-bottom-color: currentColor; }

@media (max-width: 820px) {
  .contact-grid { grid-template-columns: 1fr; gap: var(--sp-7); }
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--obsidian-3);
  padding: var(--sp-7) 0 var(--sp-6);
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  gap: var(--sp-5); flex-wrap: wrap;
  font-family: var(--mono); font-size: 12px; color: var(--fg-inverse-3);
  letter-spacing: 0.02em;
}
.footer-links { display: flex; gap: var(--sp-5); }
.footer-links a:hover { color: var(--paper); }

/* ---------- Utilities ---------- */
.hide-sm { }
@media (max-width: 640px) {
  .hide-sm { display: none; }
}

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