/* CATALYTICS — black & white minimalist */

:root {
  --black: #0a0a0a;
  --white: #ffffff;
  --grey: #8a8a8a;
  --line: #e4e4e4;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--white);
  color: var(--black);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.4;
}

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

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

/* ---------- nav ---------- */

nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 4vw;
  background: var(--white);
  border-bottom: 1px solid var(--line);
  z-index: 100;
}

.wordmark {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.35em;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--black);
}

.wordmark .logo-mark {
  width: 28px;
  height: 28px;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

.nav-links { display: flex; gap: 34px; }

.nav-links a {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey);
  transition: color 0.2s;
}

.nav-links a:hover, .nav-links a.active { color: var(--black); }

/* ---------- mobile nav ---------- */

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 4px;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  z-index: 102;
}

.menu-toggle .bar {
  width: 22px;
  height: 1.5px;
  background: var(--black);
  transition: transform 0.25s ease, opacity 0.25s ease;
  transform-origin: center;
  display: block;
}

.menu-toggle.open .bar:nth-child(1) {
  transform: translateY(3.75px) rotate(45deg);
}
.menu-toggle.open .bar:nth-child(2) {
  transform: translateY(-3.75px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 67px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 6vh 6vw 5vh;
  border-top: 1px solid var(--line);
  flex-direction: column;
  justify-content: space-between;
  z-index: 99;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  transform: translateY(-8px);
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.mobile-nav-links a {
  font-size: clamp(22px, 6vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--black);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: padding-left 0.2s;
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
  padding-left: 6px;
}

.mobile-nav-links a span.sub {
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--grey);
  font-weight: 600;
}

.mobile-nav-footer {
  padding-top: 24px;
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--grey);
  display: flex;
  justify-content: space-between;
}

/* ---------- layout ---------- */

main { padding-top: 62px; }

section { padding: 9vh 4vw; }

.label {
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 26px;
}

/* ---------- hero ---------- */

.hero {
  min-height: 88vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  font-size: clamp(38px, 6.4vw, 96px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 16ch;
}

.hero h1 .thin { font-weight: 300; }

.hero p {
  margin-top: 34px;
  font-size: clamp(15px, 1.4vw, 19px);
  color: var(--grey);
  max-width: 46ch;
}

/* ---------- pillars ---------- */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  margin: 0 4vw 9vh;
}

.pillar {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 44px 34px 54px;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  transition: background 0.25s, color 0.25s;
}

.pillar:hover { background: var(--black); color: var(--white); }

.pillar .num {
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--grey);
  margin-bottom: auto;
}

.pillar h3 {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 38px 0 12px;
}

.pillar p { font-size: 14px; color: var(--grey); max-width: 30ch; }
.pillar:hover p { color: #b5b5b5; }

/* ---------- cta band ---------- */

.cta-band {
  background: var(--black);
  color: var(--white);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}

.cta-band h2 {
  font-size: clamp(24px, 3vw, 44px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.cta-band .meta { color: #b5b5b5; font-size: 13px; letter-spacing: 0.18em; text-transform: uppercase; margin-top: 10px; }

.btn {
  display: inline-block;
  border: 1px solid var(--white);
  padding: 16px 42px;
  font-size: 12px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.btn:hover { background: var(--white); color: var(--black); }

.btn.dark { border-color: var(--black); }
.btn.dark:hover { background: var(--black); color: var(--white); }

/* ---------- solutions ---------- */

.page-head { border-bottom: 1px solid var(--line); }

.page-head h1 {
  font-size: clamp(34px, 5vw, 72px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  max-width: 18ch;
}

.page-head p { margin-top: 26px; color: var(--grey); font-size: 16px; max-width: 52ch; }

.solution {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6vw;
  border-bottom: 1px solid var(--line);
  padding: 7vh 4vw;
}

.solution .left .num {
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--grey);
  display: block;
  margin-bottom: 20px;
}

.solution h2 {
  font-size: clamp(24px, 2.6vw, 38px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.solution .right p { font-size: 15px; margin-bottom: 18px; }

.solution .right .tag {
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--grey);
  display: block;
  margin-bottom: 6px;
}

/* ---------- tools ---------- */

.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  margin: 0 4vw 6vh;
}

.tool {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 40px 32px 48px;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  transition: background 0.25s, color 0.25s;
}

.tool:hover { background: var(--black); color: var(--white); }

.tool .kind { font-size: 10px; letter-spacing: 0.28em; text-transform: uppercase; color: var(--grey); margin-bottom: auto; }
.tool h3 { font-size: 22px; font-weight: 700; margin: 34px 0 12px; }
.tool p { font-size: 14px; color: var(--grey); }
.tool:hover p { color: #b5b5b5; }
.tool .go { margin-top: 26px; font-size: 11px; letter-spacing: 0.25em; text-transform: uppercase; }

.note { margin: 0 4vw 9vh; font-size: 12px; color: var(--grey); letter-spacing: 0.05em; }

/* ---------- about ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 6vw;
  padding: 8vh 4vw;
}

.about-grid h2 {
  font-size: clamp(26px, 3.4vw, 52px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
}

.about-grid .bio p { font-size: 15px; margin-bottom: 16px; color: var(--black); }
.about-grid .bio .muted { color: var(--grey); }

.stack {
  list-style: none;
  margin-top: 34px;
  border-top: 1px solid var(--line);
}

.stack li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
}

.stack li span { color: var(--grey); letter-spacing: 0; text-transform: none; }

/* ---------- contact ---------- */

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6vw;
  padding: 8vh 4vw;
  min-height: 70vh;
}

.contact-wrap h1 {
  font-size: clamp(34px, 4.6vw, 68px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.contact-info { margin-top: 40px; font-size: 14px; }
.contact-info .row { padding: 16px 0; border-top: 1px solid var(--line); }
.contact-info .row:last-child { border-bottom: 1px solid var(--line); }
.contact-info .tag { font-size: 10px; letter-spacing: 0.28em; text-transform: uppercase; color: var(--grey); display: block; margin-bottom: 5px; }

form .field { margin-bottom: 30px; }

form label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 10px;
}

form input, form textarea {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--black);
  background: transparent;
  font: inherit;
  font-size: 16px;
  padding: 8px 0;
  outline: none;
  border-radius: 0;
}

form textarea { resize: vertical; min-height: 110px; }

form input:focus, form textarea:focus { border-bottom: 2px solid var(--black); }

/* ---------- footer ---------- */

footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 26px 4vw;
  border-top: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--grey);
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .pillars, .tools-grid { grid-template-columns: 1fr 1fr; }
  .solution, .about-grid, .contact-wrap { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav-links { display: none !important; }
  .menu-toggle { display: flex !important; }
  .mobile-nav { display: flex; }
}

@media (max-width: 600px) {
  .pillars, .tools-grid { grid-template-columns: 1fr; }
  .wordmark { font-size: 13px; letter-spacing: 0.28em; }
}