/* ─────────────────────────────────────────────────────────
   ЗАВОД ПРАВИЛЬНЫХ ЛЕСТНИЦ — Main Stylesheet
   Architecture premium · Editorial · Light + Precise
───────────────────────────────────────────────────────── */

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

:root {
  /* Color system */
  --c-bg:        #F5F4F0;
  --c-surface:   #FAFAF8;
  --c-border:    #E0DDD8;
  --c-border-lt: #ECEAE5;
  --c-ink:       #1A1916;
  --c-ink-mid:   #4A4844;
  --c-ink-muted: #8A8883;
  --c-ink-faint: #BCBAB6;
  --c-accent:    #1A1916;
  --c-dark-bg:   #111110;
  --c-dark-surf: #1C1B19;
  --c-dark-mid:  #2C2B28;

  /* Typography */
  --f-display: 'Cormorant Garamond', Georgia, serif;
  --f-body:    'Inter', -apple-system, sans-serif;

  /* Spacing */
  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  1.5rem;
  --sp-lg:  2.5rem;
  --sp-xl:  4rem;
  --sp-2xl: 6rem;
  --sp-3xl: 9rem;

  /* Layout */
  --max-w: 1360px;
  --gutter: clamp(1.5rem, 4vw, 3.5rem);

  /* Transitions */
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-out: cubic-bezier(0.0, 0.0, 0.2, 1);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--f-body);
  background: var(--c-bg);
  color: var(--c-ink);
  overflow-x: hidden;
  line-height: 1.6;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── UTILITY ──────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.label-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--f-body);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
}

.label-tag::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--c-ink-muted);
  flex-shrink: 0;
}

.label-tag--light {
  color: rgba(255,255,255,0.5);
}
.label-tag--light::before {
  background: rgba(255,255,255,0.35);
}

.section-title {
  font-family: var(--f-display);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.section-title em {
  font-style: italic;
  font-weight: 300;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--sp-lg);
  margin-bottom: var(--sp-xl);
  flex-wrap: wrap;
}

.section-link {
  margin-left: auto;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-ink-mid);
  border-bottom: 1px solid var(--c-border);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.section-link:hover { color: var(--c-ink); border-color: var(--c-ink); }

/* ── BUTTONS ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--f-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.15s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--c-ink);
  color: var(--c-bg);
  padding: 0.9rem 1.75rem;
}
.btn--primary:hover { background: #2d2c29; }

.btn--ghost {
  background: transparent;
  color: rgba(255,255,255,0.85);
  padding: 0.9rem 1.75rem;
  border: 1px solid rgba(255,255,255,0.35);
}
.btn--ghost:hover { background: rgba(255,255,255,0.08); color: #fff; border-color: rgba(255,255,255,0.7); }

.btn--nav {
  background: var(--c-ink);
  color: var(--c-bg);
  padding: 0.65rem 1.25rem;
  font-size: 0.7rem;
}
.btn--nav:hover { background: #2d2c29; }

.btn--outline-light {
  background: transparent;
  color: rgba(255,255,255,0.85);
  padding: 0.9rem 1.75rem;
  border: 1px solid rgba(255,255,255,0.4);
}
.btn--outline-light:hover { background: rgba(255,255,255,0.08); color: #fff; }

.btn--full { width: 100%; justify-content: center; }

/* ── NAV ──────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  padding: 0 var(--gutter);
  height: 72px;
  display: flex;
  align-items: center;
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.nav.scrolled {
  background: rgba(245, 244, 240, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--c-border);
}

.nav__inner {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--sp-lg);
}

.nav__logo {
  flex-shrink: 0;
  color: var(--c-bg);
  transition: color 0.3s;
}
.nav.scrolled .nav__logo { color: var(--c-ink); }

.logo-mark {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  flex-shrink: 0;
}
.logo-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.logo-text__top {
  font-family: var(--f-display);
  font-size: 9px;
  font-weight: 300;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-transform: uppercase;
  white-space: nowrap;
}
.logo-text__bottom {
  font-family: var(--f-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.2em;
  line-height: 1.1;
  text-transform: uppercase;
  white-space: nowrap;
}

.nav__links {
  display: flex;
  gap: var(--sp-lg);
  margin-left: auto;
  align-items: center;
}
.nav__links a {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  transition: color 0.2s;
}
.nav__links a:hover { color: #fff; }
.nav.scrolled .nav__links a { color: var(--c-ink-mid); }
.nav.scrolled .nav__links a:hover { color: var(--c-ink); }

.nav.scrolled .btn--nav {
  background: var(--c-ink);
  color: var(--c-bg);
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.nav__burger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: #fff;
  transition: background 0.3s;
}
.nav.scrolled .nav__burger span { background: var(--c-ink); }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--c-bg);
  z-index: 800;
  padding: 100px var(--gutter) 3rem;
  flex-direction: column;
}
.mobile-menu.open { display: flex; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 0; }
.mobile-menu li { border-bottom: 1px solid var(--c-border); }
.mm-link {
  display: block;
  font-family: var(--f-display);
  font-size: 2rem;
  font-weight: 300;
  padding: 1rem 0;
  color: var(--c-ink);
}
.mm-link--cta {
  font-family: var(--f-body);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-ink);
  margin-top: 2rem;
  padding: 1.25rem 2rem;
  background: var(--c-ink);
  color: var(--c-bg);
  display: inline-block;
}

/* ── HERO ─────────────────────────────────────────────── */
.hero {
  position: relative;
  height: 100svh;
  min-height: 640px;
  display: flex;
  align-items: flex-end;
  padding-bottom: clamp(4rem, 8vh, 7rem);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  transform: scale(1.02);
  transition: transform 8s var(--ease-out);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    165deg,
    rgba(20,19,16,0.55) 0%,
    rgba(20,19,16,0.38) 40%,
    rgba(20,19,16,0.65) 100%
  );
}

/* Grid lines graphic overlay */
.hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero__grid-line {
  position: absolute;
  background: rgba(255,255,255,0.07);
}
.hero__grid-line--v1 { top: 0; bottom: 0; left: calc(var(--gutter) + 200px); width: 1px; }
.hero__grid-line--v2 { top: 0; bottom: 0; right: calc(var(--gutter) + 100px); width: 1px; }
.hero__grid-line--h1 { left: 0; right: 0; top: 72px; height: 1px; }

.hero__content {
  position: relative;
  z-index: 10;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  padding: 0 var(--gutter);
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 1.5rem;
}
.eyebrow-line {
  display: inline-block;
  width: 24px;
  height: 1px;
  background: rgba(255,255,255,0.4);
}

.hero__title {
  font-family: var(--f-display);
  font-size: clamp(3.5rem, 9vw, 8rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 2rem;
}
.hero__title em {
  font-style: italic;
  font-weight: 300;
}

.hero__sub {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.65);
  letter-spacing: 0.02em;
  margin-bottom: 2.5rem;
  max-width: 440px;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  right: var(--gutter);
  bottom: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  z-index: 10;
}
.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: rgba(255,255,255,0.3);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.7);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { top: -100%; }
  100% { top: 100%; }
}
.hero__scroll span {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  writing-mode: vertical-rl;
}

.hero__note {
  position: absolute;
  left: var(--gutter);
  bottom: 3rem;
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  z-index: 10;
}

/* ── STATEMENT ────────────────────────────────────────── */
.statement {
  background: var(--c-bg);
  padding: var(--sp-3xl) 0;
  position: relative;
}

.statement::before {
  content: '';
  position: absolute;
  top: 0; left: var(--gutter); right: var(--gutter);
  height: 1px;
  background: var(--c-border);
}

.statement__inner {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: var(--sp-xl);
  align-items: start;
}

.statement__label {
  padding-top: 0.4rem;
}

.statement__lead {
  font-family: var(--f-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 300;
  line-height: 1.2;
  color: var(--c-ink);
  margin-bottom: 1.5rem;
}
.statement__lead em { font-style: italic; }

.statement__body {
  font-size: 0.925rem;
  line-height: 1.75;
  color: var(--c-ink-mid);
  max-width: 56ch;
}

.statement__stats {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  border-left: 1px solid var(--c-border);
  padding-left: var(--sp-lg);
}

.stat__num {
  display: block;
  font-family: var(--f-display);
  font-size: 2.5rem;
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-ink);
}
.stat__label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
  margin-top: 0.4rem;
}

/* ── PROJECTS ─────────────────────────────────────────── */
.projects {
  padding: var(--sp-3xl) 0;
  background: var(--c-surface);
}

.projects .container { margin-bottom: var(--sp-xl); }

.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}

.project-card--wide {
  grid-column: 1 / -1;
}

.project-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--c-dark-bg);
}

.project-card__img {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.project-card--wide .project-card__img {
  aspect-ratio: 16/7;
}
.project-card:not(.project-card--wide) .project-card__img {
  aspect-ratio: 4/3;
}

.project-card__img img {
  transition: transform 0.8s var(--ease);
}
.project-card:hover .project-card__img img {
  transform: scale(1.04);
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,14,12,0.65) 0%, rgba(15,14,12,0.1) 50%, transparent 100%);
  transition: opacity 0.3s;
}
.project-card:hover .project-card__overlay {
  opacity: 0.8;
}

.project-card__info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  display: flex;
  align-items: flex-end;
  gap: 1.5rem;
  color: #fff;
}

.project-card__index {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.4);
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 0.2rem;
}

.project-card__title {
  font-family: var(--f-display);
  font-size: 1.35rem;
  font-weight: 300;
  line-height: 1.2;
  margin-bottom: 0.35rem;
}
.project-card--wide .project-card__title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
}

.project-card__meta {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.5);
}

.project-card__year {
  margin-left: auto;
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.35);
  flex-shrink: 0;
}

/* ── SOLUTIONS ────────────────────────────────────────── */
.solutions {
  padding: var(--sp-3xl) 0;
  background: var(--c-bg);
}

.solutions__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--c-border);
}

.solution-card {
  padding: 2.5rem 2rem;
  border-right: 1px solid var(--c-border);
  transition: background 0.25s var(--ease);
  position: relative;
}
.solution-card:last-child { border-right: none; }
.solution-card:hover { background: var(--c-surface); }

.solution-card__icon {
  color: var(--c-ink-mid);
  margin-bottom: 1.5rem;
  opacity: 0.7;
}

.solution-card h3 {
  font-family: var(--f-display);
  font-size: 1.35rem;
  font-weight: 400;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.solution-card p {
  font-size: 0.825rem;
  line-height: 1.7;
  color: var(--c-ink-mid);
  margin-bottom: 1.5rem;
}

.solution-link {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
  border-bottom: 1px solid var(--c-border);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.solution-link:hover { color: var(--c-ink); border-color: var(--c-ink); }

/* ── MATERIALS ────────────────────────────────────────── */
.materials {
  background: var(--c-bg);
  padding-bottom: var(--sp-3xl);
}

.materials__header {
  padding-top: var(--sp-3xl);
  padding-bottom: var(--sp-xl);
  display: flex;
  align-items: baseline;
  gap: var(--sp-lg);
}

.mat-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 520px;
}

.mat-row--dark {
  background: var(--c-dark-bg);
}
.mat-row--dark .mat-row__title,
.mat-row--dark p,
.mat-row--dark .mat-row__num,
.mat-row--dark .label-tag { color: #fff; }
.mat-row--dark .mat-row__text { color: rgba(255,255,255,0.6); }
.mat-row--dark .mat-row__num { color: rgba(255,255,255,0.15); }
.mat-row--dark .mat-row__tags li { border-color: rgba(255,255,255,0.15); color: rgba(255,255,255,0.5); }

.mat-row__img {
  overflow: hidden;
  position: relative;
}
.mat-row__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}
.mat-row:hover .mat-row__img img { transform: scale(1.03); }

.mat-row__content {
  padding: clamp(2.5rem, 5vw, 5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.mat-row__content--right {
  order: -1;
}

.mat-row__num {
  font-family: var(--f-display);
  font-size: 5rem;
  font-weight: 300;
  line-height: 1;
  color: var(--c-border);
  margin-bottom: 1rem;
  letter-spacing: -0.04em;
}

.mat-row__title {
  font-family: var(--f-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 300;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  color: var(--c-ink);
}

.mat-row__text {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--c-ink-mid);
  margin-bottom: 2rem;
  max-width: 44ch;
}

.mat-row__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.mat-row__tags li {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--c-border);
  padding: 0.35rem 0.75rem;
  color: var(--c-ink-muted);
}

/* ── RAILINGS ─────────────────────────────────────────── */
.railings {
  padding: var(--sp-3xl) 0;
  background: var(--c-surface);
  position: relative;
}

.railings__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-xl);
  align-items: center;
}

.railings__left p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--c-ink-mid);
  margin: 1.5rem 0 2rem;
  max-width: 44ch;
}

.railings__types {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--c-border);
}

.railing-type {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--c-border);
}

.railing-type__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-ink-muted);
  flex-shrink: 0;
  margin-top: 0.45rem;
}

.railing-type strong {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-ink);
  margin-bottom: 0.25rem;
}
.railing-type span {
  font-size: 0.8rem;
  color: var(--c-ink-muted);
  line-height: 1.55;
}

.railings__right {
  aspect-ratio: 3/4;
  overflow: hidden;
  position: relative;
}
.railings__right img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}
.railings__right:hover img { transform: scale(1.03); }

/* ── PROCESS ──────────────────────────────────────────── */
.process {
  padding: var(--sp-3xl) 0;
  background: var(--c-bg);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.process__steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border: 1px solid var(--c-border);
  margin-top: var(--sp-xl);
}

.process-step {
  padding: 2rem 1.75rem 2.5rem;
  border-right: 1px solid var(--c-border);
  position: relative;
}
.process-step:last-child { border-right: none; }

.process-step__num {
  display: block;
  font-family: var(--f-display);
  font-size: 3rem;
  font-weight: 300;
  color: var(--c-border);
  line-height: 1;
  margin-bottom: 1.5rem;
}

.process-step__line {
  position: absolute;
  top: 2rem;
  right: 0;
  width: 1px;
  height: 3rem;
  background: var(--c-border);
  display: none;
}

.process-step h4 {
  font-family: var(--f-display);
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 0.75rem;
  color: var(--c-ink);
}

.process-step p {
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--c-ink-muted);
}

/* ── ARCHITECTS ───────────────────────────────────────── */
.architects {
  position: relative;
  background: var(--c-dark-bg);
  padding: var(--sp-3xl) 0;
  overflow: hidden;
}

.architects__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 70% 50%, rgba(40,38,33,0.8) 0%, rgba(15,14,12,1) 70%);
  pointer-events: none;
}

/* Subtle diagonal lines texture */
.architects__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 40px,
    rgba(255,255,255,0.012) 40px,
    rgba(255,255,255,0.012) 41px
  );
}

.architects__overlay { display: none; }

.architects__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--sp-xl);
  align-items: center;
}

.architects__text .section-title { color: #fff; }

.architects__text p {
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.55);
  margin: 1.5rem 0 2rem;
  max-width: 46ch;
}

.architects__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 2.5rem;
}
.architects__list li {
  font-size: 0.825rem;
  color: rgba(255,255,255,0.6);
  padding: 0.9rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  padding-left: 1.25rem;
  position: relative;
}
.architects__list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: rgba(255,255,255,0.25);
}

.architects__graphic {
  display: flex;
  align-items: center;
  justify-content: center;
}
.blueprint-svg {
  width: 100%;
  max-width: 320px;
  height: auto;
  opacity: 0.9;
}

/* ── ABOUT / HISTORY ──────────────────────────────────── */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 640px;
  position: relative;
}

.about__image-half {
  position: relative;
  overflow: hidden;
}
.about__image-half img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about__image-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15,14,12,0.1);
}

.about__content-half {
  background: var(--c-bg);
  display: flex;
  align-items: center;
  padding: var(--sp-xl) clamp(2.5rem, 5vw, 5rem);
}

.about__text .section-title { margin: 1rem 0 1.5rem; }

.about__text p {
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--c-ink-mid);
  margin-bottom: 1rem;
  max-width: 44ch;
}

.about__timeline {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--c-border);
}

.timeline-item {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--c-border);
  align-items: start;
}

.timeline-item__year {
  font-family: var(--f-display);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--c-ink-muted);
}
.timeline-item__text {
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--c-ink-mid);
}

/* ── PARTNERS ─────────────────────────────────────────── */
.partners {
  padding: var(--sp-xl) 0;
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  background: var(--c-surface);
}

.partners__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-xl);
  flex-wrap: wrap;
}

.partners__label {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
  flex-shrink: 0;
  max-width: 160px;
  line-height: 1.6;
}

.partners__list {
  display: flex;
  align-items: center;
  gap: 0;
  flex: 1;
  flex-wrap: wrap;
}

.partner-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  color: var(--c-ink-muted);
  flex: 1;
  min-width: 120px;
  transition: color 0.2s;
}
.partner-item:hover { color: var(--c-ink); }
.partner-item span {
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
  line-height: 1.4;
}

.partner-divider {
  width: 1px;
  height: 40px;
  background: var(--c-border);
  flex-shrink: 0;
}

/* ── CONTACT ──────────────────────────────────────────── */
.contact {
  padding: var(--sp-3xl) 0;
  background: var(--c-bg);
}

.contact__inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--sp-xl);
  align-items: start;
}

.contact__title {
  font-family: var(--f-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 300;
  line-height: 1.0;
  letter-spacing: -0.02em;
  margin: 1rem 0 1.25rem;
}

.contact__sub {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-ink-mid);
  margin-bottom: 2.5rem;
  max-width: 38ch;
}

.contact__accent-block {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  padding: 1.5rem;
  background: var(--c-dark-bg);
}

.contact__accent-line {
  width: 3px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.15);
}

.contact__accent-block p {
  font-family: var(--f-display);
  font-size: 1rem;
  font-style: italic;
  font-weight: 300;
  line-height: 1.6;
  color: rgba(255,255,255,0.7);
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--c-border);
}

.contact__detail-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--c-border);
  gap: 1rem;
}

.detail-label {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
}
.detail-value {
  font-size: 0.85rem;
  color: var(--c-ink);
  text-align: right;
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: var(--c-surface);
  padding: clamp(1.75rem, 4vw, 3rem);
  border: 1px solid var(--c-border);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-field label {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-ink-muted);
}

.form-field input,
.form-field textarea {
  font-family: var(--f-body);
  font-size: 0.9rem;
  color: var(--c-ink);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  padding: 0.85rem 1rem;
  outline: none;
  border-radius: 0;
  transition: border-color 0.2s var(--ease);
  resize: none;
  -webkit-appearance: none;
}
.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--c-ink-faint);
}
.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--c-ink-mid);
}

.form-field--select .select-wrap {
  position: relative;
}
.form-field--select select {
  font-family: var(--f-body);
  font-size: 0.9rem;
  color: var(--c-ink);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  padding: 0.85rem 2.5rem 0.85rem 1rem;
  outline: none;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  border-radius: 0;
  cursor: pointer;
  transition: border-color 0.2s;
}
.form-field--select select:focus { border-color: var(--c-ink-mid); }
.select-arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--c-ink-muted);
}

.form-note {
  font-size: 0.7rem;
  color: var(--c-ink-faint);
  line-height: 1.5;
  text-align: center;
}

.form-success {
  display: none;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.825rem;
  color: var(--c-ink-mid);
  background: #F0EDE8;
  border: 1px solid var(--c-border);
  padding: 1rem 1.25rem;
}
.form-success.visible { display: flex; }

/* ── FOOTER ───────────────────────────────────────────── */
.footer {
  background: var(--c-dark-bg);
  color: rgba(255,255,255,0.5);
  padding: var(--sp-xl) 0 var(--sp-lg);
}

.footer__inner {
  display: flex;
  gap: var(--sp-xl);
  margin-bottom: var(--sp-xl);
  align-items: flex-start;
  padding-bottom: var(--sp-xl);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer__brand .nav__logo { color: rgba(255,255,255,0.6); }
.footer__tagline {
  font-size: 0.75rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.3);
  margin-top: 1.25rem;
}

.footer__nav {
  display: flex;
  gap: var(--sp-xl);
  margin-left: auto;
}

.footer__nav-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer__nav-head {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
  margin-bottom: 0.25rem;
}

.footer__nav-col a {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
  transition: color 0.2s;
}
.footer__nav-col a:hover { color: rgba(255,255,255,0.8); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer__bottom span { font-size: 0.7rem; color: rgba(255,255,255,0.25); }
.footer__legal { font-size: 0.65rem; color: rgba(255,255,255,0.18); }

/* ── SCROLL REVEAL ────────────────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.75s var(--ease-out), transform 0.75s var(--ease-out);
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ───────────────────────────────────────── */
@media (max-width: 1100px) {
  .solutions__grid { grid-template-columns: repeat(2, 1fr); }
  .solution-card:nth-child(2) { border-right: none; }
  .solution-card:nth-child(odd) { border-bottom: 1px solid var(--c-border); }
  .process__steps { grid-template-columns: repeat(3, 1fr); }
  .process-step:nth-child(3) { border-right: none; }
  .process-step:nth-child(4), .process-step:nth-child(5) { border-top: 1px solid var(--c-border); }
  .statement__inner { grid-template-columns: 1fr 1.5fr 1fr; }
}

@media (max-width: 900px) {
  .nav__links, .btn--nav { display: none; }
  .nav__burger { display: flex; }
  .nav__logo { color: #fff; }

  .hero__title { font-size: clamp(2.8rem, 11vw, 5rem); }

  .statement__inner {
    grid-template-columns: 1fr;
    gap: var(--sp-lg);
  }
  .statement__stats {
    flex-direction: row;
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--c-border);
    padding-top: var(--sp-lg);
    gap: var(--sp-xl);
  }

  .projects__grid { grid-template-columns: 1fr; }
  .project-card--wide { grid-column: 1; }
  .project-card--wide .project-card__img { aspect-ratio: 16/9; }

  .mat-row { grid-template-columns: 1fr; }
  .mat-row__content--right { order: 0; }
  .mat-row__img { aspect-ratio: 16/9; height: auto; }

  .railings__inner { grid-template-columns: 1fr; }
  .railings__right { aspect-ratio: 4/3; }

  .about { grid-template-columns: 1fr; }
  .about__image-half { aspect-ratio: 16/9; height: auto; }
  .about__content-half { padding: var(--sp-xl) var(--gutter); }

  .architects__inner { grid-template-columns: 1fr; }
  .architects__graphic { display: none; }

  .contact__inner { grid-template-columns: 1fr; }

  .solutions__grid { grid-template-columns: 1fr 1fr; }
  .process__steps { grid-template-columns: 1fr 1fr; }
  .process-step:nth-child(2) { border-right: none; }
}

@media (max-width: 600px) {
  :root { --sp-3xl: 5rem; --sp-xl: 3rem; }

  .hero__sub .br-desk { display: none; }
  .hero__actions { flex-direction: column; align-items: flex-start; gap: 0.75rem; }

  .solutions__grid { grid-template-columns: 1fr; }
  .solution-card { border-right: none; border-bottom: 1px solid var(--c-border); }
  .solution-card:last-child { border-bottom: none; }

  .process__steps { grid-template-columns: 1fr; }
  .process-step { border-right: none; border-bottom: 1px solid var(--c-border); }
  .process-step:last-child { border-bottom: none; }

  .partners__inner { flex-direction: column; align-items: flex-start; gap: var(--sp-md); }
  .partners__list { gap: 0; flex-wrap: wrap; }
  .partner-divider { display: none; }
  .partner-item { flex: 0 0 50%; min-width: 0; padding: 1rem; }

  .statement__stats { flex-direction: column; gap: var(--sp-md); }

  .footer__inner { flex-direction: column; gap: var(--sp-lg); }
  .footer__nav { flex-direction: column; gap: var(--sp-md); margin-left: 0; }

  .section-header { flex-direction: column; gap: var(--sp-sm); }
  .section-link { margin-left: 0; }
}