/* =========================================================
   ENGINEERING TOOLS — STYLESHEET
   Design tokens, base, layout, components, responsive
   ========================================================= */

:root {
  /* Color */
  --c-black:        #0f1113;
  --c-charcoal:      #1a1d21;
  --c-charcoal-2:    #23272c;
  --c-charcoal-3:    #2d3238;
  --c-steel:         #4c525a;
  --c-steel-light:   #8b929b;
  --c-steel-lighter: #b7bcc2;
  --c-white:         #f3f4f5;
  --c-off-white:     #e9eaec;
  --c-accent:        #e2891c;
  --c-accent-dark:   #b96b12;
  --c-accent-light:  #f4a94a;

  /* Type */
  --f-display: 'Oswald', 'Arial Narrow', sans-serif;
  --f-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --f-mono: 'JetBrains Mono', monospace;

  /* Layout */
  --container-w: 1240px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --header-h: 84px;
  --header-h-scrolled: 68px;

  /* Motion */
  --ease: cubic-bezier(.22,.61,.36,1);
  --dur-fast: .22s;
  --dur-med: .5s;
  --dur-slow: .9s;
}

/* =========================================================
   RESET
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--f-body);
  background: var(--c-white);
  color: var(--c-charcoal);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font: inherit; border: none; background: none; cursor: pointer; }
input, textarea, select { font: inherit; }

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 32px;
}

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

:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
}

/* =========================================================
   TYPE UTILITIES
   ========================================================= */
.eyebrow {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
  display: inline-block;
  margin-bottom: 16px;
  position: relative;
  padding-left: 28px;
}
.eyebrow::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  width: 18px; height: 2px;
  background: var(--c-accent);
  transform: translateY(-50%);
}

.section-title {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--c-charcoal);
  line-height: 1.15;
}
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head--light .section-title,
.section-head--light .eyebrow { color: var(--c-white); }
.section-head--light .eyebrow { color: var(--c-accent-light); }

.text-accent { color: var(--c-accent); }

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 16px 30px;
  border-radius: var(--radius-sm);
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }

.btn--accent {
  background: var(--c-accent);
  color: var(--c-black);
}
.btn--accent:hover { background: var(--c-accent-light); }

.btn--outline {
  border: 1px solid rgba(243,244,245,0.35);
  color: var(--c-white);
}
.btn--outline:hover { border-color: var(--c-accent); color: var(--c-accent); }

.btn--outline-light {
  border: 1px solid rgba(255,255,255,0.4);
  color: var(--c-white);
}
.btn--outline-light:hover { border-color: var(--c-white); background: rgba(255,255,255,0.08); }

/* =========================================================
   REVEAL ANIMATION
   ========================================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* =========================================================
   HEADER / NAVBAR
   ========================================================= */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 500;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: height var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.site-header.is-scrolled {
  height: var(--header-h-scrolled);
  background: rgba(15,17,19,0.92);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 24px rgba(0,0,0,0.3);
}

.navbar {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Logo image: the source file is a tall, stacked logo (mark + wordmark +
   tagline). Rather than crop it (which can hide the mark entirely if the
   crop window misses it), we show the whole logo scaled to the available
   header height with object-fit: contain, and use mix-blend-mode: screen
   so the logo's black background disappears into the dark navbar instead
   of showing as a box. */
.nav-logo__img-wrap {
  display: flex;
  align-items: center;
  height: 58px;
  flex-shrink: 0;
  transition: height var(--dur-fast) var(--ease);
}
.site-header.is-scrolled .nav-logo__img-wrap { height: 46px; }
.nav-logo__img {
  height: 100%;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  mix-blend-mode: screen;
  display: block;
}

.nav-logo__text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  white-space: nowrap;
}
.nav-logo__brand {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--c-white);
}
.nav-logo__brand em { font-style: normal; color: var(--c-accent); }
.nav-logo__tagline {
  font-family: var(--f-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-steel-light);
  margin-top: 3px;
  transition: opacity var(--dur-fast) var(--ease), height var(--dur-fast) var(--ease);
}
.site-header.is-scrolled .nav-logo__tagline { opacity: 0; height: 0; margin: 0; overflow: hidden; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-link {
  font-family: var(--f-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-off-white);
  position: relative;
  padding: 6px 0;
  transition: color var(--dur-fast) var(--ease);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--c-accent);
  transition: width var(--dur-fast) var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--c-accent); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-cta { padding: 12px 24px; font-size: 0.76rem; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  z-index: 600;
  flex-shrink: 0;
}
.nav-toggle span {
  height: 2px;
  width: 100%;
  background: var(--c-white);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--c-black);
}
.hero__bg {
  position: absolute; inset: 0;
  background: url('../assets/images/hero-bg.jpg') center/cover no-repeat;
  filter: grayscale(35%) contrast(1.05);
}
.hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15,17,19,0.75) 0%, rgba(15,17,19,0.88) 55%, rgba(15,17,19,0.98) 100%);
}
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(226,137,28,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(226,137,28,0.08) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 60% 40%, black 10%, transparent 70%);
}
.hero__particles {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
}
.hero__shard {
  position: absolute;
  background: var(--c-accent);
  opacity: 0.14;
  clip-path: polygon(30% 0, 100% 0, 70% 100%, 0 100%);
}
.hero__shard--1 { width: 240px; height: 100%; top: 0; right: 8%; }
.hero__shard--2 { width: 120px; height: 60%; top: 20%; right: 22%; opacity: 0.08; }

.hero__content {
  position: relative;
  z-index: 2;
  padding-top: var(--header-h);
  width: 100%;
}
.hero__title {
  font-family: var(--f-display);
  font-weight: 600;
  text-transform: uppercase;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1.08;
  color: var(--c-white);
  letter-spacing: -0.01em;
  margin-bottom: 24px;
}
.hero__sub {
  color: var(--c-steel-lighter);
  font-size: 1.1rem;
  max-width: 560px;
  margin-bottom: 40px;
}
.hero__actions {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero__trust {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-steel-light);
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}
.hero__trust i { font-size: 0.6rem; color: var(--c-accent); }

.hero__scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1px solid rgba(243,244,245,0.4);
  border-radius: 14px;
  z-index: 2;
}
.hero__scroll span {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 4px;
  background: var(--c-accent);
  border-radius: 50%;
  transform: translateX(-50%);
  animation: scrollDot 1.8s infinite var(--ease);
}
@keyframes scrollDot {
  0% { top: 8px; opacity: 1; }
  70% { opacity: 1; }
  100% { top: 24px; opacity: 0; }
}

/* =========================================================
   ABOUT
   ========================================================= */
.about { padding: 140px 0 100px; background: var(--c-white); }
.about__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 72px;
  align-items: center;
  margin-bottom: 90px;
}
.about__media {
  position: relative;
  max-width: 460px;
  margin: 0 auto;
}
.about__media img {
  width: 100%;
  aspect-ratio: 4 / 3.6;
  max-height: 480px;
  object-fit: cover;
  filter: grayscale(15%);
}
.about__media-frame {
  position: absolute;
  top: 16px; left: 16px;
  right: -16px; bottom: -16px;
  border: 2px solid var(--c-accent);
  z-index: -1;
}
.about__lead {
  font-size: 1.2rem;
  color: var(--c-charcoal);
  font-weight: 500;
  margin-bottom: 20px;
}
.about__content > p:not(.about__lead) { color: var(--c-steel); margin-bottom: 36px; }

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.feature-card {
  padding: 24px;
  border: 1px solid #e2e3e5;
  border-left: 3px solid var(--c-accent);
  background: #fafafa;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(0,0,0,0.08); }
.feature-card i { font-size: 1.4rem; color: var(--c-accent); margin-bottom: 12px; }
.feature-card h3 { font-family: var(--f-display); font-size: 1.02rem; text-transform: uppercase; margin-bottom: 8px; letter-spacing: 0.01em; }
.feature-card p { font-size: 0.9rem; color: var(--c-steel); }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid #e2e3e5;
  padding-top: 48px;
}
.stat { text-align: center; border-right: 1px solid #e2e3e5; }
.stat:last-child { border-right: none; }
.stat__num, .stat__num-text {
  font-family: var(--f-display);
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  font-weight: 600;
  color: var(--c-charcoal);
}
.stat__suffix { font-family: var(--f-display); font-size: 2rem; color: var(--c-accent); }
.stat__label {
  display: block;
  font-family: var(--f-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-steel-light);
  margin-top: 8px;
}

/* =========================================================
   SERVICES
   ========================================================= */
.services { padding: 100px 0; background: var(--c-off-white); }
.services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: #d7d9db;
  border: 1px solid #d7d9db;
}
.service-card {
  position: relative;
  background: var(--c-white);
  padding: 40px 28px;
  transition: background var(--dur-fast) var(--ease);
}
.service-card:hover { background: var(--c-charcoal); }
.service-card:hover h3, .service-card:hover p { color: var(--c-white); }
.service-card:hover i { color: var(--c-accent); }
.service-card:hover .service-card__index { color: rgba(243,244,245,0.15); }
.service-card:hover .card-link { color: var(--c-accent); }

.service-card__index {
  position: absolute;
  top: 20px; right: 24px;
  font-family: var(--f-mono);
  font-size: 0.85rem;
  color: #d0d2d4;
  transition: color var(--dur-fast) var(--ease);
}
.service-card i {
  font-size: 1.8rem;
  color: var(--c-accent);
  margin-bottom: 20px;
  display: block;
  transition: color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.service-card:hover i { transform: scale(1.1); }
.service-card h3 {
  font-family: var(--f-display);
  font-size: 1.08rem;
  text-transform: uppercase;
  margin-bottom: 12px;
  color: var(--c-charcoal);
  transition: color var(--dur-fast) var(--ease);
}
.service-card p {
  font-size: 0.88rem;
  color: var(--c-steel);
  margin-bottom: 22px;
  transition: color var(--dur-fast) var(--ease);
}
.card-link {
  font-family: var(--f-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-charcoal);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color var(--dur-fast) var(--ease), gap var(--dur-fast) var(--ease);
}
.card-link i { font-size: 0.7rem; margin: 0; display: inline; color: inherit; }
.card-link:hover { gap: 12px; }

/* =========================================================
   FEATURED SPLIT
   ========================================================= */
.featured__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.featured__row--reverse { direction: rtl; }
.featured__row--reverse > * { direction: ltr; }
.featured__media {
  overflow: hidden;
  background: var(--c-charcoal-2);
}
.featured__media img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  object-position: center 20%;
  display: block;
  transition: transform 0.6s var(--ease);
}
.featured__media:hover img { transform: scale(1.05); }
.featured__content {
  background: var(--c-charcoal);
  color: var(--c-white);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 64px 72px;
}
.featured__tag {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 18px;
}
.featured__content h3 {
  font-family: var(--f-display);
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.featured__content p {
  color: var(--c-steel-lighter);
  margin-bottom: 32px;
  max-width: 440px;
}

/* =========================================================
   PROJECTS / GALLERY
   ========================================================= */
.projects { padding: 100px 0; background: var(--c-white); }
.filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.filter-btn {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 10px 20px;
  border: 1px solid #d7d9db;
  color: var(--c-steel);
  transition: all var(--dur-fast) var(--ease);
}
.filter-btn:hover { border-color: var(--c-accent); color: var(--c-accent); }
.filter-btn.active { background: var(--c-charcoal); border-color: var(--c-charcoal); color: var(--c-white); }

.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1/1;
  cursor: pointer;
  transition: transform var(--dur-med) var(--ease), opacity var(--dur-med) var(--ease);
}
.gallery-item.is-hidden {
  display: none;
}
.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.gallery-item:hover img { transform: scale(1.12); }
.gallery-item figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 18px 20px;
  background: linear-gradient(0deg, rgba(15,17,19,0.9), transparent);
  color: var(--c-white);
  font-family: var(--f-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--dur-fast) var(--ease);
}
.gallery-item:hover figcaption { opacity: 1; transform: translateY(0); }
.gallery-item figcaption i { color: var(--c-accent); flex-shrink: 0; }

/* =========================================================
   WHY US
   ========================================================= */
.why-us { background: var(--c-charcoal); padding: 100px 0; position: relative; }
.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}
.why-card { position: relative; padding-top: 20px; }
.why-card__num {
  font-family: var(--f-display);
  font-size: 3.2rem;
  font-weight: 600;
  color: var(--c-charcoal-3);
  display: block;
  margin-bottom: 4px;
  line-height: 1;
}
.why-card i { font-size: 1.5rem; color: var(--c-accent); margin: 16px 0 18px; display: block; }
.why-card h3 {
  font-family: var(--f-display);
  font-size: 1.15rem;
  text-transform: uppercase;
  color: var(--c-white);
  margin-bottom: 10px;
}
.why-card p { color: var(--c-steel-light); font-size: 0.92rem; }

/* =========================================================
   PROCESS
   ========================================================= */
.process { padding: 100px 0; background: var(--c-off-white); overflow: hidden; }
.process__track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}
.process__line {
  position: absolute;
  top: 18px; left: 0; right: 0;
  height: 1px;
  background: #d0d2d4;
  z-index: 0;
}
.process-step { position: relative; z-index: 1; }
.process-step__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  background: var(--c-white);
  border: 2px solid var(--c-accent);
  color: var(--c-charcoal);
  font-family: var(--f-mono);
  font-size: 0.82rem;
  margin-bottom: 20px;
}
.process-step h3 {
  font-family: var(--f-display);
  font-size: 1rem;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.process-step p { font-size: 0.84rem; color: var(--c-steel); }

/* =========================================================
   CTA
   ========================================================= */
.cta {
  position: relative;
  background: var(--c-black);
  padding: 110px 0;
  overflow: hidden;
}
.cta__grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(226,137,28,0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(226,137,28,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 20% 50%, black, transparent 75%);
}
.cta__content { position: relative; z-index: 1; text-align: center; }
.cta__content h2 {
  font-family: var(--f-display);
  text-transform: uppercase;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--c-white);
  max-width: 760px;
  margin: 0 auto 20px;
  line-height: 1.2;
}
.cta__content p { color: var(--c-steel-lighter); margin-bottom: 40px; }
.cta__actions { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

/* =========================================================
   CONTACT
   ========================================================= */
.contact { padding: 120px 0; background: var(--c-white); }
.contact__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 80px;
}
.contact__desc { color: var(--c-steel); margin: 20px 0 36px; max-width: 420px; }
.contact__details { display: flex; flex-direction: column; gap: 18px; }
.contact__details li,
.contact__details li a {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--f-mono);
  font-size: 0.95rem;
  width: 100%;
}
.contact__details i {
  width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  background: var(--c-charcoal);
  color: var(--c-accent);
  flex-shrink: 0;
}
.contact__details li a { transition: color var(--dur-fast) var(--ease); }
.contact__details li a:hover { color: var(--c-accent); }
.contact__details li a:hover i { color: var(--c-white); background: var(--c-accent); transition: all var(--dur-fast) var(--ease); }

.contact__form { position: relative; }
.form-row { margin-bottom: 22px; position: relative; }
.form-row label {
  display: block;
  font-family: var(--f-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-steel);
  margin-bottom: 8px;
}
.form-row input, .form-row textarea, .form-row select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid #d7d9db;
  background: #fafafa;
  color: var(--c-charcoal);
  transition: border-color var(--dur-fast) var(--ease);
}
.form-row input:focus, .form-row textarea:focus, .form-row select:focus {
  border-color: var(--c-accent);
  outline: none;
}
.form-row.has-error input, .form-row.has-error textarea, .form-row.has-error select {
  border-color: #d64545;
}
.form-error {
  display: block;
  font-size: 0.78rem;
  color: #d64545;
  margin-top: 6px;
  min-height: 1em;
}
.form-submit {
  width: 100%;
  justify-content: center;
  position: relative;
  margin-top: 8px;
}
.form-submit.is-loading .btn-text { opacity: 0; }
.btn-loader {
  position: absolute;
  width: 18px; height: 18px;
  border: 2px solid rgba(0,0,0,0.2);
  border-top-color: var(--c-black);
  border-radius: 50%;
  opacity: 0;
}
.form-submit.is-loading .btn-loader {
  opacity: 1;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.form-success {
  display: none;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  padding: 16px 18px;
  background: #eafaf0;
  border: 1px solid #a8e6c1;
  color: #1c7a42;
  font-size: 0.9rem;
}
.form-success.is-visible { display: flex; }
.form-success i { font-size: 1.2rem; }

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer { background: var(--c-black); color: var(--c-steel-light); padding: 80px 0 0; }
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer__brand { display: flex; flex-direction: column; align-items: flex-start; }
.footer__logo-img {
  height: 96px;
  width: auto;
  object-fit: contain;
  mix-blend-mode: screen;
  margin-bottom: 14px;
  margin-left: -8px;
}
.footer__brand p { margin-top: 0; font-size: 0.88rem; letter-spacing: 0.04em; }
.footer__col h4 {
  font-family: var(--f-display);
  color: var(--c-white);
  text-transform: uppercase;
  font-size: 0.95rem;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}
.footer__col ul { display: flex; flex-direction: column; gap: 12px; font-size: 0.9rem; }
.footer__col a:hover { color: var(--c-accent); }
.footer__col ul li a {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer__bottom {
  padding: 26px 32px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--c-steel);
}

/* =========================================================
   FLOATING WHATSAPP BUTTON
   ========================================================= */
.whatsapp-float {
  position: fixed;
  left: 24px;
  bottom: 24px;
  z-index: 900;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-accent);
  color: var(--c-black);
  font-size: 1.7rem;
  box-shadow: 0 8px 24px rgba(226,137,28,0.4), 0 2px 8px rgba(0,0,0,0.25);
  border: 2px solid var(--c-charcoal);
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.whatsapp-float:hover {
  background: var(--c-accent-light);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 12px 30px rgba(226,137,28,0.5), 0 2px 10px rgba(0,0,0,0.3);
}
.whatsapp-float:active { transform: translateY(-1px) scale(0.98); }

@media (max-width: 768px) {
  .whatsapp-float { width: 50px; height: 50px; font-size: 1.4rem; left: 18px; bottom: 18px; }
}

/* =========================================================
   LIGHTBOX
   ========================================================= */
.lightbox {
  position: fixed; inset: 0;
  background: rgba(10,11,12,0.96);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 40px;
}
.lightbox.is-open { display: flex; }
.lightbox img { max-width: 90vw; max-height: 80vh; object-fit: contain; }
.lightbox__caption {
  position: absolute;
  bottom: 40px;
  font-family: var(--f-mono);
  color: var(--c-steel-lighter);
  font-size: 0.9rem;
}
.lightbox__close {
  position: absolute;
  top: 30px; right: 40px;
  font-size: 2.4rem;
  color: var(--c-white);
  line-height: 1;
}
.lightbox__close:hover { color: var(--c-accent); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1024px) {
  .about__grid { grid-template-columns: 1fr; gap: 48px; }
  .about__media { max-width: 420px; }
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(3, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); gap: 48px; }
  .process__track { grid-template-columns: repeat(3, 1fr); row-gap: 48px; }
  .process__line { display: none; }
  .contact__grid { grid-template-columns: 1fr; gap: 56px; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .navbar { padding: 0 20px; }
  .nav-logo__img-wrap { height: 46px; }
  .site-header.is-scrolled .nav-logo__img-wrap { height: 38px; }
  .nav-logo__brand { font-size: 0.9rem; }
  .nav-logo__tagline { display: none; }

  .nav-menu {
    position: fixed;
    top: 0; right: -100%;
    width: min(320px, 82vw);
    height: 100vh;
    background: var(--c-charcoal);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 28px;
    padding: 40px;
    transition: right var(--dur-med) var(--ease);
    z-index: 550;
    overflow-y: auto;
  }
  .nav-menu.is-open { right: 0; }
  .nav-cta-wrap { margin-top: 12px; }
  .nav-toggle { display: flex; }

  .hero__content { padding-top: calc(var(--header-h) + 12px); }
  .hero__title { font-size: clamp(2rem, 8vw, 2.6rem); }
  .hero__sub { font-size: 1rem; margin-bottom: 32px; }
  .hero__actions { margin-bottom: 36px; }
  .hero__scroll { display: none; }

  .about { padding: 100px 0 70px; }
  .about__media { max-width: 320px; }
  .about__media img { aspect-ratio: 4 / 3.3; max-height: 320px; }
  .about__media-frame { top: 12px; left: 12px; right: -12px; bottom: -12px; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; gap: 32px; }
  .stat { border-right: none; border-bottom: 1px solid #e2e3e5; padding-bottom: 24px; }
  .stat:last-child { border-bottom: none; padding-bottom: 0; }

  .services__grid { grid-template-columns: 1fr; }
  .featured__row, .featured__row--reverse { grid-template-columns: 1fr; direction: ltr; }
  .featured__media img { height: 280px; object-position: center 15%; }
  .featured__content { padding: 40px 24px; }

  .gallery { grid-template-columns: repeat(2, 1fr); }
  /* Captions rely on :hover, which doesn't exist on touch devices —
     always show them on mobile so work labels remain visible. */
  .gallery-item figcaption { opacity: 1; transform: translateY(0); padding: 12px 14px; font-size: 0.72rem; }

  .why-grid { grid-template-columns: 1fr; gap: 40px; }
  .process__track { grid-template-columns: 1fr 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
  .contact__details li, .contact__details li a { font-size: 0.88rem; }
  .footer__grid { grid-template-columns: 1fr; padding-bottom: 40px; }
  .footer__logo-img { height: 80px; }
  .cta__actions { flex-direction: column; align-items: stretch; }
}

@media (max-width: 480px) {
  .container { padding: 0 20px; }
  .navbar { padding: 0 16px; }
  .nav-logo__img-wrap { height: 36px; }
  .nav-logo__brand { font-size: 0.76rem; letter-spacing: 0.01em; }
  .hero__title { font-size: clamp(1.7rem, 9vw, 2.1rem); }
  .featured__media img { height: 220px; }
  .hero__sub { max-width: 100%; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__trust { gap: 10px; font-size: 0.7rem; }
  .about__media { max-width: 100%; }
  .about__media img { aspect-ratio: 4 / 3; max-height: 280px; }
  .gallery { grid-template-columns: 1fr 1fr; gap: 12px; }
  .process__track { grid-template-columns: 1fr; }
  .filters { gap: 8px; }
  .filter-btn { padding: 8px 14px; font-size: 0.72rem; }
  .contact__details i { width: 36px; height: 36px; }
  .footer__logo-img { height: 68px; }
}