/* ============================================================
   BENAVIDES ENGINEERING — styles
   Design tokens at the top. See CLAUDE.md for design system.
   ============================================================ */

/* ---------- RESET ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: #0c1620;
  color: #f5f0e8;
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  cursor: default;
}
::selection { background: #335270; color: #0c1620; }
a { color: inherit; text-decoration: none; }

/* ---------- DESIGN TOKENS ---------- */
:root {
  --ink: #0c1620;
  --paper: #f5f0e8;
  --paper-dim: rgba(245, 240, 232, 0.55);
  --paper-faint: rgba(245, 240, 232, 0.18);
  --rule: rgba(245, 240, 232, 0.12);
  --gold: #335270;
  --display: 'Italiana', serif;
  --sans: 'DM Sans', sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

/* ---------- 3D TERRAIN CANVAS ---------- */
#terrain {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* ---------- BRAND CONTOUR BACKDROP ---------- */
.contour-bg {
  position: fixed;
  inset: -30px;
  z-index: 1;
  pointer-events: none;
  background-image: url('assets/contours.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  mix-blend-mode: screen;
  opacity: 0.15;
  filter: drop-shadow(0 0 6px rgba(245, 240, 232, 0.10));
  animation: contour-drift 40s ease-in-out infinite alternate;
  will-change: transform;
}
@keyframes contour-drift {
  from { transform: translate(-15px, -10px); }
  to   { transform: translate( 15px,  10px); }
}
@media (prefers-reduced-motion: reduce) {
  .contour-bg { animation: none; transform: none; }
}

/* ---------- CUSTOM CURSOR (THEODOLITE RETICLE) ---------- */
html, body { cursor: none; }
a, button, .btn { cursor: none; }
input, textarea { cursor: text; }

.cursor-instrument {
  position: fixed;
  top: 0;
  left: 0;
  width: 40px;
  height: 40px;
  margin-left: -20px;
  margin-top: -20px;
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  will-change: transform;
  transition: opacity 200ms ease;
}
.cursor-instrument.is-active { opacity: 1; }

.cursor-instrument svg {
  display: block;
  width: 100%;
  height: 100%;
  --hover-scale: 1;
  --click-scale: 1;
  transform: scale(calc(var(--hover-scale) * var(--click-scale)));
  transform-origin: 50% 50%;
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
.cursor-instrument.is-hover svg { --hover-scale: 1.5; }
.cursor-instrument.is-down svg  { --click-scale: 0.82; transition-duration: 120ms; }

.cursor-instrument.is-hover .cursor-ring circle,
.cursor-instrument.is-hover .cursor-ring line,
.cursor-instrument.is-hover .cursor-cross line {
  stroke: var(--gold);
  transition: stroke 300ms ease;
}
.cursor-ring circle,
.cursor-ring line,
.cursor-cross line { transition: stroke 300ms ease; }

.cursor-ring {
  transform-box: fill-box;
  transform-origin: 50% 50%;
  animation: cursor-ring-rotate 20s linear infinite;
}
@keyframes cursor-ring-rotate {
  from { transform: rotate(0deg);   }
  to   { transform: rotate(360deg); }
}
.cursor-dot {
  animation: cursor-dot-pulse 1.5s ease-in-out infinite;
}
@keyframes cursor-dot-pulse {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 1;   }
}

@media (prefers-reduced-motion: reduce) {
  .cursor-ring { animation: none; }
  .cursor-dot  { animation: none; opacity: 0.85; }
}

/* ---------- CURSOR HUD ---------- */
.cursor-hud {
  position: fixed;
  bottom: 24px;
  left: 48px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--paper-dim);
  pointer-events: none;
  user-select: none;
  font-variant-numeric: tabular-nums;
  transition: opacity 400ms ease;
}
.cursor-hud.is-hidden {
  opacity: 0;
  pointer-events: none;
}
.cursor-hud .dot {
  color: var(--gold);
  font-size: 8px;
  line-height: 1;
  letter-spacing: 0;
  animation: hud-pulse 1.5s ease-in-out infinite;
}
.cursor-hud .sep { opacity: 0.5; }
@keyframes hud-pulse {
  0%, 100% { opacity: 0.35; }
  50%      { opacity: 1;    }
}
@media (prefers-reduced-motion: reduce) {
  .cursor-hud .dot { animation: none; opacity: 0.85; }
}

/* Grain overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.96 0 0 0 0 0.94 0 0 0 0 0.91 0 0 0 0.18 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  opacity: 0.35;
  mix-blend-mode: overlay;
}

/* ---------- NAV ---------- */
nav.top {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 28px 48px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
nav.top .wordmark {
  font-family: var(--display);
  font-size: 18px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--paper);
  line-height: 1;
}
nav.top .coords {
  color: var(--paper-dim);
  text-align: center;
  font-weight: 300;
}
nav.top .coords span { color: var(--paper); }
nav.top ul {
  list-style: none;
  display: flex;
  gap: 36px;
  justify-content: flex-end;
}
nav.top ul a {
  position: relative;
  color: var(--paper-dim);
  transition: color 0.4s ease;
}
nav.top ul a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.7, 0, 0.2, 1);
}
nav.top ul a:hover { color: var(--paper); cursor: pointer; }
nav.top ul a:hover::after { transform: scaleX(1); }

/* ---------- SIDE RAILS ---------- */
.rail {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 36px;
  z-index: 40;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 110px 0 60px;
  align-items: center;
}
.rail.left { left: 0; }
.rail.right { right: 0; }
.rail .tick {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--paper-faint);
  letter-spacing: 0.2em;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}
.rail.right .tick { transform: rotate(0deg); writing-mode: vertical-rl; }

/* ---------- SECTION SHELL ---------- */
section {
  position: relative;
  z-index: 10;
  padding: 0 96px;
}
.section-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.section-num::before {
  content: '';
  width: 36px;
  height: 1px;
  background: var(--gold);
}

/* ---------- HERO ---------- */
.hero {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  padding-top: 80px;
}
.hero .stamp {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.4em;
  color: var(--paper-dim);
  margin-bottom: 36px;
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(56px, 11vw, 168px);
  line-height: 0.88;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--paper);
}
.hero h1 .row {
  display: block;
  overflow: hidden;
}
.hero h1 .row span {
  display: block;
  transform: translateY(120%);
  animation: rise 1.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.hero h1 .row:nth-child(1) span { animation-delay: 0.2s; }
.hero h1 .row:nth-child(2) span { animation-delay: 0.35s; }
@keyframes rise { to { transform: translateY(0); } }

.hero .rule {
  width: min(74vw, 1100px);
  height: 1px;
  background: linear-gradient(to right, transparent, var(--paper) 20%, var(--paper) 80%, transparent);
  margin: 32px 0 24px;
  opacity: 0;
  animation: fade-in 1.4s ease 0.8s forwards;
}
.hero .services-row {
  font-family: var(--display);
  font-size: clamp(14px, 1.6vw, 22px);
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--paper);
  display: flex;
  gap: clamp(20px, 4vw, 56px);
  opacity: 0;
  animation: fade-in 1.4s ease 1.0s forwards;
}
.hero .services-row .sep {
  color: var(--paper-faint);
  font-weight: 300;
}
@keyframes fade-in { to { opacity: 1; } }

.scroll-cue {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--paper-dim);
  text-transform: uppercase;
  opacity: 0;
  animation: fade-in 1.4s ease 1.6s forwards;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.scroll-cue .line {
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, var(--paper-dim), transparent);
  position: relative;
  overflow: hidden;
}
.scroll-cue .line::after {
  content: '';
  position: absolute;
  top: -56px;
  left: 0;
  width: 100%;
  height: 56px;
  background: linear-gradient(to bottom, transparent, var(--paper));
  animation: scroll-pulse 2.2s ease-in-out infinite;
}
@keyframes scroll-pulse {
  0% { transform: translateY(0); }
  100% { transform: translateY(112px); }
}

/* ---------- INTRO ---------- */
.intro {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 96px;
  padding-top: 120px;
  padding-bottom: 120px;
  background: linear-gradient(to bottom, transparent, rgba(12,22,32,0.7) 30%, rgba(12,22,32,0.85) 70%, transparent);
}
.intro .left h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(36px, 5vw, 78px);
  line-height: 1.02;
  letter-spacing: 0.005em;
  text-transform: uppercase;
  color: var(--paper);
}
.intro .left h2 em {
  font-style: italic;
  color: var(--gold);
  font-family: var(--display);
}
.intro .right {
  border-left: 1px solid var(--rule);
  padding-left: 48px;
}
.intro .right p {
  font-size: 17px;
  line-height: 1.7;
  color: var(--paper);
  max-width: 480px;
  font-weight: 300;
}
.intro .right p + p { margin-top: 24px; color: var(--paper-dim); }
.intro .meta {
  margin-top: 48px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--paper-dim);
  text-transform: uppercase;
  display: flex;
  gap: 32px;
}
.intro .meta span span { color: var(--paper); }

/* ---------- SERVICES ---------- */
.services {
  padding-top: 160px;
  padding-bottom: 160px;
  background: rgba(12,22,32,0.92);
}
.services .heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: end;
  gap: 96px;
  margin-bottom: 96px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--rule);
}
.services .heading h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(48px, 7vw, 112px);
  line-height: 0.9;
  text-transform: uppercase;
  color: var(--paper);
  letter-spacing: 0.01em;
}
.services .heading .blurb {
  font-size: 15px;
  color: var(--paper-dim);
  line-height: 1.7;
  max-width: 420px;
  margin-left: auto;
}
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.service {
  background: rgba(12,22,32,0.88);
  padding: 48px 44px 44px;
  position: relative;
  overflow: hidden;
  transition: background 0.6s ease;
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.service:hover { background: rgba(20,20,20,0.96); }
.service::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 70% 30%,
      transparent 0%,
      transparent 40%,
      rgba(51, 82, 112, 0.05) 70%,
      transparent 100%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.service:hover::after { opacity: 1; }
.service .tag {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--paper-dim);
  text-transform: uppercase;
}
.service .tag .num { color: var(--gold); }
.service .name {
  font-family: var(--display);
  font-size: clamp(40px, 4.5vw, 72px);
  text-transform: uppercase;
  color: var(--paper);
  line-height: 0.95;
  margin: 36px 0 24px;
  letter-spacing: 0.01em;
}
.service .desc {
  color: var(--paper-dim);
  font-size: 14px;
  line-height: 1.7;
  max-width: 360px;
}
.service .mini-topo {
  position: absolute;
  bottom: 24px;
  right: 24px;
  width: 84px;
  height: 84px;
  opacity: 0.35;
  transition: opacity 0.6s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.service:hover .mini-topo {
  opacity: 0.85;
  transform: scale(1.08) rotate(-3deg);
}

/* ---------- PROCESS ---------- */
.process {
  padding-top: 160px;
  padding-bottom: 160px;
}
.process h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 96px);
  line-height: 0.95;
  text-transform: uppercase;
  color: var(--paper);
  max-width: 1100px;
  margin-bottom: 96px;
  letter-spacing: 0.005em;
}
.process h2 em {
  font-style: italic;
  color: var(--gold);
  font-family: var(--display);
}
.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 18px;
  left: 8px;
  right: 8px;
  height: 1px;
  background: var(--rule);
}
.step {
  position: relative;
  padding-top: 48px;
}
.step::before {
  content: '';
  position: absolute;
  top: 14px;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--paper);
  background: var(--ink);
  transition: background 0.5s ease, transform 0.5s ease;
}
.step:hover::before { background: var(--gold); transform: scale(1.2); }
.step .num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.step h3 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 28px;
  text-transform: uppercase;
  color: var(--paper);
  line-height: 1.1;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.step p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--paper-dim);
  max-width: 280px;
}

/* ---------- CONTACT ---------- */
.contact {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 160px 96px;
}
.contact .small {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.4em;
  color: var(--paper-dim);
  text-transform: uppercase;
  margin-bottom: 40px;
}
.contact h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(48px, 8vw, 140px);
  line-height: 0.92;
  text-transform: uppercase;
  color: var(--paper);
  margin-bottom: 12px;
  letter-spacing: 0.01em;
}
.contact h2 em {
  font-style: italic;
  color: var(--gold);
}
.contact .lede {
  max-width: 580px;
  color: var(--paper-dim);
  font-size: 16px;
  line-height: 1.7;
  margin: 32px 0 56px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 22px 44px;
  border: 1px solid var(--paper);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  cursor: pointer;
  background: transparent;
  position: relative;
  overflow: hidden;
  transition: color 0.5s ease;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--paper);
  transform: translateX(-101%);
  transition: transform 0.5s cubic-bezier(0.7, 0, 0.2, 1);
  z-index: -1;
}
.btn:hover { color: var(--ink); }
.btn:hover::before { transform: translateX(0); }
.btn .arrow { transition: transform 0.5s ease; }
.btn:hover .arrow { transform: translateX(6px); }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  width: 100%;
  max-width: 900px;
  margin-top: 96px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.contact-cell {
  background: rgba(12,22,32,0.6);
  padding: 36px 24px;
  text-align: center;
}
.contact-cell .label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.3em;
  color: var(--paper-dim);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.contact-cell .value {
  font-family: var(--display);
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--paper);
  text-transform: uppercase;
}
.contact-cell.phone .value,
.contact-cell.email .value {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.18em;
}
.contact-cell.email .value {
  text-transform: none;
  letter-spacing: 0.04em;
}

/* ---------- FOOTER ---------- */
footer {
  position: relative;
  z-index: 10;
  padding: 48px 96px;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  align-items: center;
  background: rgba(12,22,32,0.95);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--paper-dim);
}
footer .wm {
  font-family: var(--display);
  font-size: 14px;
  letter-spacing: 0.32em;
  color: var(--paper);
}
footer .center { text-align: center; }
footer .right { text-align: right; }

/* ---------- REVEAL ON SCROLL ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1),
              transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
.reveal.d1 { transition-delay: 0.1s; }
.reveal.d2 { transition-delay: 0.2s; }
.reveal.d3 { transition-delay: 0.3s; }
.reveal.d4 { transition-delay: 0.4s; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  nav.top { padding: 20px 24px; grid-template-columns: 1fr auto; }
  nav.top .coords { display: none; }
  nav.top ul { gap: 20px; }
  .rail { display: none; }
  section { padding: 0 24px; }
  .hero h1 { font-size: clamp(48px, 14vw, 96px); }
  .intro { grid-template-columns: 1fr; gap: 48px; padding: 96px 24px; }
  .intro .right { border-left: none; border-top: 1px solid var(--rule); padding-left: 0; padding-top: 32px; }
  .services .heading { grid-template-columns: 1fr; gap: 32px; }
  .services .heading .blurb { margin-left: 0; }
  .service-grid { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr; gap: 48px; }
  .timeline::before { display: none; }
  .step { padding-top: 0; padding-left: 28px; border-left: 1px solid var(--rule); }
  .step::before { top: 4px; left: -5px; }
  .contact-grid { grid-template-columns: 1fr; }
  footer { grid-template-columns: 1fr; text-align: center; gap: 16px; padding: 36px 24px; }
  footer .right, footer .center { text-align: center; }
  .cursor-hud { display: none; }
  .cursor-instrument { display: none; }
  html, body, a, button, .btn { cursor: auto; }
  a, button, .btn { cursor: pointer; }
  input, textarea { cursor: text; }
}