/* =========================================================================
   IPAMEX — Industrial Puerto del Aire S.A. de C.V.
   Design system + page styles. No build step: plain CSS, custom properties.
   ========================================================================= */

/* ---------- Fonts (self-hosted, latin + latin-ext for Spanish) ---------- */
@font-face {
  font-family: 'Archivo';
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  src: url('../fonts/archivo-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Archivo';
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  src: url('../fonts/archivo-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF,
    U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020,
    U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/inter-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/inter-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF,
    U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020,
    U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ---------------------------- Design tokens ---------------------------- */
:root {
  /* Brand red sampled from the IPAMEX mark */
  --red: #cd1312;
  --red-bright: #e8261f;
  --red-deep: #9d0f0e;

  --ink: #0b0c0e;
  --surface-900: #121417;
  --surface-800: #1a1d22;
  --surface-700: #23272e;
  --hairline-dark: #2c313a;

  --paper: #ffffff;
  --paper-100: #f4f5f7;
  --paper-200: #e8eaee;
  --hairline: #d8dbe1;

  --text-strong: #0b0c0e;
  --text: #40454e;
  --text-muted: #6b7280;

  --on-dark-strong: #ffffff;
  --on-dark: #c3c8d1;
  --on-dark-muted: #8b929d;

  --font-display: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;

  --shell: 1240px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --section-y: clamp(4.5rem, 10vw, 9rem);

  --radius: 4px;
  --radius-lg: 8px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --header-h: 76px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--text-strong);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.026em;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }
ul { margin: 0; padding: 0; list-style: none; }
/* Figures are used as grid items throughout, so the UA margin must go. */
figure, figcaption { margin: 0; }

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

button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--red-bright);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: var(--red); color: #fff; }

/* ------------------------------ Utilities ------------------------------ */
.shell {
  width: min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--red);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius);
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

/* Small uppercase section label with the red rule motif from the logo */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 1.25rem;
}
.eyebrow::before {
  content: '';
  width: 2.25rem;
  height: 2px;
  background: var(--red);
  flex: none;
}
.section--dark .eyebrow { color: var(--red-bright); }
.section--dark .eyebrow::before { background: var(--red-bright); }

.section {
  padding-block: var(--section-y);
  position: relative;
}
.section--dark {
  background: var(--surface-900);
  color: var(--on-dark);
}
.section--dark h2,
.section--dark h3 { color: var(--on-dark-strong); }
.section--tint { background: var(--paper-100); }

.section-title {
  font-size: clamp(2.1rem, 5.4vw, 3.6rem);
}
.section-lead {
  font-size: clamp(1.02rem, 1.6vw, 1.16rem);
  color: var(--text);
  max-width: 60ch;
}
.section--dark .section-lead { color: var(--on-dark); }

/* Buttons ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 1.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  border-radius: var(--radius);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    transform 0.2s var(--ease), border-color 0.2s var(--ease);
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary { background: var(--red); color: #fff; }
.btn--primary:hover { background: var(--red-bright); }

.btn--ghost {
  border: 1.5px solid rgba(255, 255, 255, 0.34);
  color: #fff;
  backdrop-filter: blur(6px);
  background: rgba(255, 255, 255, 0.04);
}
.btn--ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.12); }

.btn--outline {
  border: 1.5px solid var(--hairline);
  color: var(--text-strong);
  background: var(--paper);
}
.btn--outline:hover { border-color: var(--red); color: var(--red); }

.btn__arrow { transition: transform 0.25s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }

/* ------------------------------- Header -------------------------------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background-color 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}
.header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(8, 9, 11, 0.72), rgba(8, 9, 11, 0));
  opacity: 1;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}
.header.is-stuck {
  background: rgba(11, 12, 14, 0.9);
  backdrop-filter: saturate(150%) blur(14px);
  border-bottom-color: var(--hairline-dark);
}
.header.is-stuck::before { opacity: 0; }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline: auto;
  position: relative;
}

.brand { display: flex; align-items: center; gap: 0.75rem; flex: none; }
.brand img { width: 132px; }

.nav { display: flex; align-items: center; gap: clamp(0.5rem, 1.6vw, 1.6rem); }

.nav__link {
  position: relative;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.82);
  padding: 0.4rem 0;
  transition: color 0.2s var(--ease);
  white-space: nowrap;
}
.nav__link::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--red-bright);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease);
}
.nav__link:hover,
.nav__link.is-active { color: #fff; }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }

.header .btn--primary { padding: 0.7rem 1.25rem; font-size: 0.88rem; }
/* The drawer carries its own CTA; on desktop only the header-level one shows. */
.nav > .btn--primary { display: none; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: #fff;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 22px; height: 2px;
  background: currentColor;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle span { position: relative; }
.nav-toggle span::before,
.nav-toggle span::after { content: ''; position: absolute; left: 0; }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-toggle[aria-expanded='true'] span { background: transparent; }
.nav-toggle[aria-expanded='true'] span::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded='true'] span::after { transform: translateY(-7px) rotate(-45deg); }

/* -------------------------------- Hero --------------------------------- */
.hero {
  position: relative;
  min-height: clamp(620px, 100svh, 940px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--ink);
  isolation: isolate;
}
.hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
}
.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(to top, rgba(8, 9, 11, 0.94) 0%, rgba(8, 9, 11, 0.62) 38%, rgba(8, 9, 11, 0.18) 68%, rgba(8, 9, 11, 0.45) 100%),
    linear-gradient(to right, rgba(8, 9, 11, 0.6), rgba(8, 9, 11, 0) 62%);
}

.hero__inner {
  width: min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline: auto;
  padding-block: clamp(3.5rem, 9vh, 6.5rem);
  padding-top: calc(var(--header-h) + 3rem);
}

.hero__title {
  color: #fff;
  font-size: clamp(2.6rem, 7.4vw, 5.6rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  max-width: 17ch;
}
.hero__title em {
  font-style: normal;
  color: var(--red-bright);
}

.hero__lead {
  margin-top: 1.6rem;
  max-width: 62ch;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(1rem, 1.5vw, 1.14rem);
}

.hero__actions {
  margin-top: 2.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero__scroll {
  position: absolute;
  right: var(--gutter);
  bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.72rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}
.hero__scroll::after {
  content: '';
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
  animation: scrollCue 2.4s var(--ease) infinite;
}
@keyframes scrollCue {
  0%   { transform: scaleY(0.2); transform-origin: top; opacity: 0; }
  40%  { transform: scaleY(1);   transform-origin: top; opacity: 1; }
  100% { transform: scaleY(1);   transform-origin: bottom; opacity: 0; }
}

/* ------------------------------ Stat bar ------------------------------- */
.stats {
  background: var(--ink);
  border-top: 1px solid var(--hairline-dark);
  color: var(--on-dark);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}
.stats__item {
  padding: clamp(2rem, 4vw, 3.25rem) clamp(1rem, 2.5vw, 2rem);
  border-left: 1px solid var(--hairline-dark);
  text-align: center;
}
.stats__item:first-child { border-left: 0; }
.stats__value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 5.2vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
.stats__value span { color: var(--red-bright); }
.stats__label {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--on-dark-muted);
}

/* ------------------------------ Nosotros ------------------------------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}
.about__body { display: grid; gap: 1.5rem; }
.about__body p { font-size: clamp(1rem, 1.5vw, 1.1rem); }

.about__figure {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.about__figure img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.about__badge {
  position: absolute;
  left: 0; bottom: 0;
  background: var(--red);
  color: #fff;
  padding: 1.1rem 1.4rem;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  max-width: 62%;
}
.about__badge small {
  display: block;
  font-weight: 600;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  opacity: 0.82;
  margin-bottom: 0.3rem;
}

.pillars {
  margin-top: clamp(3rem, 6vw, 4.5rem);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border-block: 1px solid var(--hairline);
}
.pillars__item {
  background: var(--paper);
  padding: clamp(1.6rem, 3vw, 2.25rem);
}
.section--tint .pillars { background: var(--paper-200); border-color: var(--paper-200); }
.section--tint .pillars__item { background: var(--paper-100); }
.pillars__num {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--red);
}
.pillars__item h3 { margin: 0.7rem 0 0.5rem; font-size: 1.18rem; letter-spacing: -0.015em; }
.pillars__item p { font-size: 0.95rem; color: var(--text-muted); }

/* ------------------------------ Servicios ------------------------------ */
.services__head {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: clamp(2.5rem, 5vw, 3.75rem);
}
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 2.4vw, 1.9rem);
}

.service {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--surface-800);
  border: 1px solid var(--hairline-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}
.service:hover { transform: translateY(-6px); border-color: #3b414c; }

.service__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--surface-700);
}
.service__media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}
.service:hover .service__media img { transform: scale(1.06); }
.service__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 12, 14, 0.7), transparent 55%);
}
.service__num {
  position: absolute;
  top: 0.9rem; left: 1rem;
  z-index: 1;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: #fff;
  background: rgba(11, 12, 14, 0.6);
  backdrop-filter: blur(6px);
  padding: 0.3rem 0.55rem;
  border-radius: 3px;
}
.service__body { padding: 1.4rem 1.4rem 1.6rem; display: grid; gap: 0.6rem; }
.service__body h3 {
  font-size: 1.16rem;
  letter-spacing: -0.015em;
  line-height: 1.25;
}
.service__body p { font-size: 0.94rem; color: var(--on-dark-muted); }
.service::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: var(--red-bright);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.service:hover::after { transform: scaleX(1); }

/* ------------------------------- Equipos ------------------------------- */
.equipment__grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
}
.equipment__list {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem 1.5rem;
}
.equipment__list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.96rem;
  color: var(--text-strong);
  font-weight: 500;
  padding-block: 0.45rem;
  border-bottom: 1px solid var(--hairline);
}
.equipment__list li::before {
  content: '';
  flex: none;
  width: 7px; height: 7px;
  margin-top: 0.6rem;
  background: var(--red);
  transform: rotate(45deg);
}

.collage {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-auto-rows: minmax(0, 1fr);
  gap: clamp(0.6rem, 1.2vw, 1rem);
}
.collage img {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}
.collage > *:first-child { grid-column: span 2; aspect-ratio: 16 / 9; }
.collage > *:not(:first-child) { aspect-ratio: 1 / 1; }

/* ------------------------------ Proyectos ------------------------------ */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  /* A fixed row height keeps every tile flush, including the two-column ones —
     per-item aspect ratios would leave the wide tiles taller than their row. */
  grid-auto-rows: clamp(160px, 17vw, 260px);
  gap: clamp(0.6rem, 1.2vw, 1rem);
}
.gallery__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface-800);
}
.gallery__item:nth-child(1),
.gallery__item:nth-child(6) { grid-column: span 2; }
.gallery__item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease), filter 0.5s var(--ease);
  filter: saturate(0.9);
}
.gallery__item:hover img { transform: scale(1.05); filter: saturate(1.05); }
.gallery__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 1.6rem 1rem 0.9rem;
  background: linear-gradient(to top, rgba(11, 12, 14, 0.85), transparent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.86rem;
  letter-spacing: -0.005em;
}

/* ------------------------------- Clientes ------------------------------ */
.clients {
  background: var(--paper-200);
  padding-block: clamp(3rem, 6vw, 4.5rem);
  border-block: 1px solid var(--hairline);
}
.clients__title {
  text-align: center;
  font-family: var(--font-display);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
/* Sizing by height rather than by grid cell keeps logos of wildly different
   aspect ratios (10:1 wordmarks next to 2:1 emblems) optically even. */
.clients__grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  /* Sized so all seven marks hold a single row at the shell's full width. */
  gap: clamp(1.5rem, 3vw, 2.5rem);
}
.clients__grid img {
  /* Sources are marks on white paper; multiply against the light strip drops
     the paper out without needing hand-cut transparency per logo. */
  mix-blend-mode: multiply;
  height: clamp(24px, 3.1vw, 36px);
  width: auto;
  max-width: 150px;
  object-fit: contain;
  opacity: 0.72;
  filter: grayscale(1);
  transition: opacity 0.3s var(--ease), filter 0.3s var(--ease);
}
.clients__grid img:hover { opacity: 1; filter: grayscale(0); }

/* --------------------------- Certificaciones --------------------------- */
.certs__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
}
.cert-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}
.cert-card {
  border: 1px solid var(--hairline-dark);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.25rem;
  background: linear-gradient(160deg, var(--surface-800), var(--surface-900));
  text-align: center;
}
.cert-card__iso {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--red-bright);
}
.cert-card__num {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.03em;
  margin: 0.35rem 0 0.5rem;
}
.cert-card__desc { font-size: 0.82rem; color: var(--on-dark-muted); line-height: 1.45; }

.cert-note {
  border-left: 3px solid var(--red);
  padding: 0.4rem 0 0.4rem 1.4rem;
  color: var(--on-dark);
}

.certs__body { display: grid; gap: 1.4rem; align-content: center; }

/* ------------------------------- Contacto ------------------------------ */
.contact__grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(2.5rem, 5vw, 4.5rem);
}

.offices { display: grid; gap: 1.75rem; margin-top: 2rem; }
.office {
  border-top: 1px solid var(--hairline);
  padding-top: 1.25rem;
}
.office h3 {
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.office address {
  font-style: normal;
  color: var(--text-muted);
  font-size: 0.96rem;
  line-height: 1.6;
}

.contact-lines { display: grid; gap: 0.85rem; margin-top: 1.75rem; }
.contact-line {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 600;
  color: var(--text-strong);
  transition: color 0.2s var(--ease);
}
a.contact-line:hover { color: var(--red); }
.contact-line svg { flex: none; color: var(--red); }
.contact-line small {
  display: block;
  font-weight: 500;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Form ------------------------------------------------------------------- */
.form {
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  display: grid;
  gap: 1.1rem;
  align-content: start;
}
.section--tint .form { box-shadow: 0 18px 50px -32px rgba(11, 12, 14, 0.4); }

.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.field { display: grid; gap: 0.4rem; }
.field label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.field input,
.field select,
.field textarea {
  font: inherit;
  font-size: 0.97rem;
  color: var(--text-strong);
  background: var(--paper-100);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 0.8rem 0.9rem;
  width: 100%;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--red);
  background: var(--paper);
}
.field input::placeholder,
.field textarea::placeholder { color: #a3a9b4; }

.form__hp { position: absolute; left: -9999px; opacity: 0; }
.form__note { font-size: 0.8rem; color: var(--text-muted); }

/* -------------------------------- Footer ------------------------------- */
.footer {
  background: var(--ink);
  color: var(--on-dark-muted);
  padding-block: clamp(3rem, 6vw, 4.5rem) 2rem;
  border-top: 1px solid var(--hairline-dark);
}
.footer__top {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--hairline-dark);
}
.footer__brand img { width: 148px; margin-bottom: 1.1rem; }
.footer__brand p { font-size: 0.9rem; max-width: 34ch; }
.footer h4 {
  font-family: var(--font-display);
  color: #fff;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer ul { display: grid; gap: 0.55rem; font-size: 0.92rem; }
.footer a { transition: color 0.2s var(--ease); }
.footer a:hover { color: #fff; }
.footer__bottom {
  padding-top: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  font-size: 0.82rem;
}

/* --------------------------- Scroll reveal ----------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay='1'] { transition-delay: 0.08s; }
.reveal[data-delay='2'] { transition-delay: 0.16s; }
.reveal[data-delay='3'] { transition-delay: 0.24s; }
.reveal[data-delay='4'] { transition-delay: 0.32s; }
.reveal[data-delay='5'] { transition-delay: 0.4s; }

/* ------------------------------ Responsive ----------------------------- */
@media (max-width: 1080px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .clients__grid { grid-template-columns: repeat(4, 1fr); row-gap: 2rem; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  :root { --header-h: 66px; }

  .nav-toggle { display: flex; }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(11, 12, 14, 0.97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--hairline-dark);
    padding: 0.5rem var(--gutter) 1.5rem;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease),
      visibility 0.28s;
    max-height: calc(100svh - var(--header-h));
    overflow-y: auto;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav__link {
    font-size: 1.05rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--hairline-dark);
  }
  .nav__link::after { display: none; }
  .nav__link.is-active { color: var(--red-bright); }
  .nav .btn { margin-top: 1.1rem; }

  .header > .header__inner > .btn--primary { display: none; }
  .nav > .btn--primary { display: inline-flex; }

  .about__grid,
  .equipment__grid,
  .certs__grid,
  .contact__grid { grid-template-columns: 1fr; }

  .about__figure { order: -1; }
  .pillars { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .hero__scroll { display: none; }
}

@media (max-width: 620px) {
  .services__grid { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: 1fr; }
  .stats__item { border-left: 0; border-top: 1px solid var(--hairline-dark); }
  .stats__item:first-child { border-top: 0; }
  .equipment__list { grid-template-columns: 1fr; }
  .cert-cards { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .clients__grid { grid-template-columns: repeat(2, 1fr); }
  .gallery__item:nth-child(1) { grid-column: span 2; }
  .footer__top { grid-template-columns: 1fr; }
  .hero__actions .btn { flex: 1 1 100%; }
}

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

/* ------------------------------- Print --------------------------------- */
@media print {
  .header, .hero__scroll, .form, .nav-toggle { display: none !important; }
  body { color: #000; background: #fff; }
  .section--dark, .clients, .footer, .stats { background: #fff !important; color: #000 !important; }
  .section--dark h2, .section--dark h3 { color: #000 !important; }
}