/* ============================================================
   TEKTON PROJECTS SA
   style.css
   ------------------------------------------------------------
   1.  Design tokens (CSS variables)
   2.  Reset & base
   3.  Layout primitives
   4.  Typography helpers
   5.  Buttons & links
   6.  Header / navigation
   7.  Hero
   8.  About
   9.  Services
   10. Projects gallery + lightbox
   11. Why Tekton
   12. Process
   13. Testimonials
   14. CTA band
   15. Contact + form
   16. Footer + back-to-top
   17. Scroll reveal
   18. Responsive
   ============================================================ */


/* ============================================================
   1. DESIGN TOKENS
   ============================================================ */
:root {
  /* --- Colour palette --------------------------------------
     Sampled directly from the Tekton Projects SA logo:
       navy   #082d47   wordmark + right-hand "T"
       grey   #3f3f3f   left-hand "T"
       red    #d82123   accent square
     Every other tone below is derived from those three.
     ---------------------------------------------------------- */
  --c-navy:         #082d47;   /* brand navy — buttons, headings */
  --c-ink:          #08202f;   /* deepened navy — dark sections */
  --c-charcoal:     #0d2b3e;
  --c-charcoal-2:   #143a52;   /* raised dark surface */
  --c-line-dark:    #23455f;

  --c-white:        #ffffff;
  --c-warm-white:   #f7f7f6;   /* page background */
  --c-bone:         #eaecec;   /* soft neutral panel */
  --c-line:         #d9dbdc;

  --c-concrete:     #8d9298;   /* concrete grey */
  --c-muted:        #5f6367;   /* body text on light — from the logo grey */
  --c-muted-dark:   #a4aeb8;   /* body text on dark */

  /* Accent — Tekton red. Swap --c-accent to re-tune the whole site.
     The two variants exist for contrast, not decoration:
       --c-accent-hover  darker, so white button text still passes AA
       --c-accent-hi     lighter, for red text sitting on dark navy     */
  --c-accent:       #d82123;   /* fills: 5.1:1 with white text */
  --c-accent-hover: #b81a1c;   /* fills: 6.6:1 with white text */
  --c-accent-text:  #c41d1f;   /* red TEXT on light: 5.0:1 on --c-bone */
  --c-accent-hi:    #f2555a;   /* red TEXT on dark:  4.9:1 on --c-ink  */
  --c-accent-dim:   rgba(216, 33, 35, 0.12);
  --c-error:        #a5151b;   /* form errors — deeper than the accent */

  /* --- Logo wordmark (header lockup) ----------------------- */
  --logo-fg:        var(--c-white);
  --logo-grey:      #9ba7b4;

  /* --- Typography ----------------------------------------- */
  --font-display: "Manrope", "Segoe UI", system-ui, sans-serif;
  --font-body:    "Inter", "Segoe UI", system-ui, sans-serif;

  --fs-eyebrow:  0.75rem;
  --fs-small:    0.875rem;
  --fs-body:     1rem;
  --fs-lead:     clamp(1.0625rem, 0.4vw + 0.95rem, 1.1875rem);
  --fs-h3:       clamp(1.125rem, 0.5vw + 1rem, 1.375rem);
  --fs-h2:       clamp(1.875rem, 2.4vw + 1.1rem, 3.25rem);
  --fs-h1:       clamp(2.375rem, 5.2vw + 0.9rem, 5.25rem);
  --fs-display:  clamp(3rem, 7vw, 6rem);

  --lh-tight: 1.06;
  --lh-head:  1.14;
  --lh-body:  1.7;
  --ls-wide:  0.18em;
  --ls-head:  -0.02em;

  /* --- Spacing -------------------------------------------- */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.5rem;
  --sp-6:  2rem;
  --sp-7:  2.5rem;
  --sp-8:  3rem;
  --sp-9:  4rem;
  --sp-10: 5rem;
  --sp-11: 7rem;

  --section-y:  clamp(4.5rem, 7vw, 8.5rem);
  --shell-max:  84rem;   /* 1344px */
  --shell-pad:  clamp(1.25rem, 4vw, 3.5rem);

  /* --- Effects -------------------------------------------- */
  --radius:     2px;
  --radius-lg:  3px;
  --shadow-sm:  0 1px 2px rgba(8, 32, 47, 0.06), 0 4px 14px rgba(8, 32, 47, 0.05);
  --shadow-md:  0 12px 32px rgba(8, 32, 47, 0.10), 0 2px 8px rgba(8, 32, 47, 0.06);
  --shadow-lg:  0 28px 70px rgba(8, 32, 47, 0.22);

  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --dur:        0.28s;
  --dur-slow:   0.6s;

  --header-h:   84px;
  --z-header:   100;
  --z-overlay:  200;
  --z-modal:    300;
}


/* ============================================================
   2. RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--c-warm-white);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;          /* belt-and-braces against horizontal scroll */
}

body.is-locked { overflow: hidden; }

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--lh-head);
  letter-spacing: var(--ls-head);
}

p { margin: 0 0 var(--sp-4); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button { cursor: pointer; }

/* Accessible focus — visible on both light and dark surfaces */
:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 1px;
}

.skip-link {
  position: absolute;
  left: var(--sp-4);
  top: -100px;
  z-index: 999;
  padding: var(--sp-3) var(--sp-5);
  background: var(--c-ink);
  color: var(--c-warm-white);
  font-size: var(--fs-small);
  letter-spacing: 0.06em;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: var(--sp-4); }

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


/* ============================================================
   3. LAYOUT PRIMITIVES
   ============================================================ */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-pad);
}

.section { padding-block: var(--section-y); }

.section--dark {
  background: var(--c-ink);
  color: var(--c-warm-white);
  /* Subtle concrete grain, generated in CSS — no image request */
  background-image:
    radial-gradient(circle at 18% 12%, rgba(255,255,255,0.05), transparent 46%),
    radial-gradient(circle at 82% 78%, rgba(216,33,35,0.10), transparent 52%);
}

.section__head { max-width: 46rem; margin-bottom: clamp(2.5rem, 4vw, 4.5rem); }

.section__head--split {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: end;
  max-width: none;
}

.section__title {
  font-size: var(--fs-h2);
  margin-bottom: var(--sp-5);
}
.section__head--split .section__title { margin-bottom: 0; }

.section__intro,
.lead {
  font-size: var(--fs-lead);
  color: var(--c-muted);
  max-width: 44ch;
}
.section--dark .section__intro,
.section--dark .lead { color: var(--c-muted-dark); }


/* ============================================================
   4. TYPOGRAPHY HELPERS
   ============================================================ */
.eyebrow {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin: 0 0 var(--sp-5);
  font-family: var(--font-display);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-accent-text);
}
.eyebrow::before {
  content: "";
  width: 2.25rem;
  height: 1px;
  background: currentColor;
  flex: none;
}
.eyebrow--light { color: var(--c-accent-hi); }


/* ============================================================
   5. BUTTONS & LINKS
   ============================================================ */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--c-ink);
  --btn-bd: currentColor;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  padding: 1.0625rem 2.125rem;
  border: 1px solid var(--btn-bd);
  border-radius: var(--radius);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-display);
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--accent {
  --btn-bg: var(--c-accent);
  --btn-fg: var(--c-white);
  --btn-bd: var(--c-accent);
}
.btn--accent:hover { --btn-bg: var(--c-accent-hover); --btn-bd: var(--c-accent-hover); }

.btn--ghost {
  --btn-fg: var(--c-white);
  --btn-bd: rgba(255, 255, 255, 0.45);
}
.btn--ghost:hover {
  --btn-bg: var(--c-white);
  --btn-fg: var(--c-ink);
  --btn-bd: var(--c-white);
}

.btn--dark {
  --btn-bg: var(--c-ink);
  --btn-fg: var(--c-white);
  --btn-bd: var(--c-ink);
}

.btn--sm { padding: 0.8125rem 1.5rem; font-size: 0.6875rem; }
.btn--block { width: 100%; }

/* Text link with a sliding rule */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
  font-family: var(--font-display);
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-ink);
}
.section--dark .link-arrow { color: var(--c-warm-white); }
.link-arrow::after {
  content: "";
  width: 2.5rem;
  height: 1px;
  background: var(--c-accent);
  transition: width var(--dur) var(--ease);
}
.link-arrow:hover { color: var(--c-accent-text); }
.link-arrow:hover::after { width: 3.75rem; }


/* ============================================================
   6. HEADER / NAVIGATION
   ============================================================ */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-header);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              backdrop-filter var(--dur) var(--ease);
}
.site-header.is-stuck {
  background: rgba(8, 32, 47, 0.92);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--c-line-dark);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  min-height: var(--header-h);
}

/* --- Brand ---------------------------------------------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  color: var(--c-white);
}
/* Monogram in the header lockup — height-driven, width follows */
.brand__logo {
  width: auto;
  height: 2.75rem;
  flex: none;
}

.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.0625rem;
  letter-spacing: 0.14em;
  color: var(--logo-fg);
}
.brand__sub {
  font-size: 0.625rem;
  letter-spacing: 0.26em;
  color: var(--logo-grey);
}

/* Footer uses the full stacked logo — there is room for it there */
.brand--footer {
  display: inline-block;
  margin-bottom: var(--sp-5);
}
.brand--footer img {
  width: auto;
  height: 6.5rem;
  transition: opacity var(--dur) var(--ease);
}
.brand--footer:hover img { opacity: 0.85; }

/* --- Desktop nav ----------------------------------------- */
.nav {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.75rem);
}
.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2.125rem);
}
.nav__link {
  position: relative;
  padding-block: var(--sp-2);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.82);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--c-accent);
  transition: width var(--dur) var(--ease);
}
.nav__link:hover { color: var(--c-white); }
.nav__link:hover::after,
.nav__link.is-active::after { width: 100%; }
.nav__link.is-active { color: var(--c-white); }

/* --- Hamburger ------------------------------------------- */
.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius);
  background: transparent;
  place-items: center;
}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--c-white);
  transition: transform var(--dur) var(--ease), opacity 0.15s var(--ease);
}
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after  { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after  { transform: translateY(-6px) rotate(-45deg); }

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-header) - 1);
  background: rgba(8, 32, 47, 0.55);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.nav-backdrop.is-visible { opacity: 1; }


/* ============================================================
   7. HERO
   ============================================================ */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100svh;
  padding-top: calc(var(--header-h) + var(--sp-8));
  padding-bottom: var(--sp-11);
  overflow: hidden;
  background: var(--c-ink);
  color: var(--c-white);
}

.hero__media { position: absolute; inset: 0; }
.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero__scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8,32,47,0.82) 0%, rgba(8,32,47,0.55) 38%, rgba(8,32,47,0.90) 100%),
    linear-gradient(90deg, rgba(8,32,47,0.78) 0%, rgba(8,32,47,0.25) 68%);
}

.hero__inner { position: relative; max-width: 60rem; }

.hero__title {
  font-size: var(--fs-h1);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: -0.03em;
  text-transform: uppercase;
  margin-bottom: var(--sp-6);
  text-wrap: balance;
}

.hero__lead {
  max-width: 40rem;
  margin-bottom: var(--sp-8);
  font-size: var(--fs-lead);
  color: rgba(255, 255, 255, 0.84);
}

.hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-4); }

/* --- Scroll cue ------------------------------------------ */
.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: clamp(1.5rem, 4vh, 2.75rem);
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  color: rgba(255, 255, 255, 0.68);
}
.scroll-cue__label {
  font-family: var(--font-display);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}
.scroll-cue__line {
  position: relative;
  width: 1px;
  height: 3rem;
  background: rgba(255, 255, 255, 0.25);
  overflow: hidden;
}
.scroll-cue__line::after {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 45%;
  background: var(--c-accent);
  animation: cue 2.4s var(--ease) infinite;
}
@keyframes cue {
  0%   { transform: translateY(-100%); }
  60%  { transform: translateY(220%); }
  100% { transform: translateY(220%); }
}
.scroll-cue:hover { color: var(--c-white); }


/* ============================================================
   8. ABOUT
   ============================================================ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 5.5rem);
  align-items: center;
}

.about__media { position: relative; }
.about__media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius);
}
.about__media::before {
  content: "";
  position: absolute;
  inset: auto auto -1.25rem -1.25rem;
  width: 55%;
  height: 55%;
  border: 1px solid var(--c-accent);
  border-right: 0;
  border-top: 0;
  z-index: -1;
}
.about__media-tag {
  position: absolute;
  right: -0.75rem;
  bottom: 2rem;
  display: flex;
  flex-direction: column;
  padding: var(--sp-4) var(--sp-5);
  background: var(--c-ink);
  color: var(--c-white);
  box-shadow: var(--shadow-md);
}
.about__media-tag span {
  font-size: 0.625rem;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-accent-hi);
}
.about__media-tag strong {
  font-family: var(--font-display);
  font-size: 1.125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.about__body p { color: var(--c-muted); }
.about__body .lead { color: var(--c-ink); }

/* --- Stats ------------------------------------------------ */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
  margin-top: clamp(2.5rem, 4vw, 3.5rem);
  padding-top: var(--sp-7);
  border-top: 1px solid var(--c-line);
}
.stat__value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 2.4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-ink);
}
.stat__value--text {
  font-size: clamp(0.9375rem, 1vw, 1.125rem);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.stat__label {
  display: block;
  margin-top: var(--sp-2);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-concrete);
}


/* ============================================================
   9. SERVICES
   ============================================================ */
.services { background: var(--c-bone); }

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 1.6vw, 1.5rem);
}
.service--wide { grid-column: 1 / -1; }

.service__link {
  position: relative;
  display: block;
  height: 100%;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--dur) var(--ease-out),
              box-shadow var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.service__link:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-accent);
}

.service__media {
  display: block;
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--c-charcoal);
}
.service--wide .service__media { aspect-ratio: 21 / 6; }
.service__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease-out), filter var(--dur) var(--ease);
  filter: grayscale(0.35) contrast(1.02);
}
.service__link:hover .service__media img {
  transform: scale(1.05);
  filter: grayscale(0) contrast(1.02);
}
.service__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8,32,47,0) 45%, rgba(8,32,47,0.42) 100%);
}

.service__body {
  display: block;
  padding: clamp(1.25rem, 2vw, 1.875rem);
}
.service__num {
  display: block;
  margin-bottom: var(--sp-3);
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-accent-text);
}
.service__name {
  font-size: var(--fs-h3);
  margin-bottom: var(--sp-3);
  text-transform: uppercase;
  letter-spacing: -0.005em;
}
.service__desc {
  display: block;
  font-size: var(--fs-small);
  line-height: 1.65;
  color: var(--c-muted);
}
.service__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-5);
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-ink);
}
.service__cta::after {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: var(--c-accent);
  transition: width var(--dur) var(--ease);
}
.service__link:hover .service__cta { color: var(--c-accent-text); }
.service__link:hover .service__cta::after { width: 2.75rem; }

.service--wide .service__body { max-width: 46rem; }


/* ============================================================
   10. PROJECTS GALLERY
   ============================================================ */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: clamp(1.75rem, 3vw, 2.75rem);
}
.filter {
  padding: 0.625rem 1.125rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: transparent;
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--c-muted);
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.filter:hover { border-color: var(--c-ink); color: var(--c-ink); }
.filter.is-active {
  background: var(--c-ink);
  border-color: var(--c-ink);
  color: var(--c-white);
}

/* Asymmetric / masonry-style grid */
.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 11rem;
  grid-auto-flow: dense;
  gap: clamp(0.75rem, 1.4vw, 1.25rem);
}

.project {
  position: relative;
  grid-column: span 2;
  grid-row: span 2;
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-charcoal);
  text-align: left;
  color: var(--c-white);
}
.project--tall { grid-row: span 3; }
.project--wide { grid-column: span 2; grid-row: span 2; }
.project--small { grid-column: span 2; grid-row: span 2; }

.project img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease-out), filter var(--dur-slow) var(--ease);
  filter: grayscale(0.4) brightness(0.9);
}
.project:hover img,
.project:focus-visible img {
  transform: scale(1.06);
  filter: grayscale(0) brightness(1);
}

.project__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(1rem, 2vw, 1.75rem);
  background: linear-gradient(180deg, rgba(8,32,47,0) 35%, rgba(8,32,47,0.86) 100%);
  transition: background var(--dur) var(--ease);
}
.project:hover .project__overlay,
.project:focus-visible .project__overlay {
  background: linear-gradient(180deg, rgba(8,32,47,0.1) 0%, rgba(8,32,47,0.9) 100%);
}
.project__cat {
  font-family: var(--font-display);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-accent-hi);
  margin-bottom: var(--sp-2);
}
.project__title {
  font-size: clamp(1rem, 1.2vw, 1.25rem);
  text-transform: uppercase;
  letter-spacing: 0.01em;
}
.project__view {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.project__view::after { content: "→"; }
.project:hover .project__view,
.project:focus-visible .project__view { opacity: 1; transform: translateY(0); }

.project.is-hidden { display: none; }

.gallery__empty {
  margin-top: var(--sp-6);
  color: var(--c-muted);
  font-size: var(--fs-small);
}

/* --- Lightbox -------------------------------------------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: grid;
  place-items: center;
  padding: clamp(0.75rem, 3vw, 2.5rem);
}
.lightbox[hidden] { display: none; }

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 18, 28, 0.9);
  backdrop-filter: blur(4px);
  animation: fade var(--dur) var(--ease);
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.lightbox__panel {
  position: relative;
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  width: min(70rem, 100%);
  max-height: min(90svh, 46rem);
  background: var(--c-charcoal);
  color: var(--c-warm-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: pop var(--dur-slow) var(--ease-out);
}
@keyframes pop {
  from { opacity: 0; transform: translateY(18px) scale(0.985); }
  to   { opacity: 1; transform: none; }
}

.lightbox__figure { margin: 0; min-height: 0; background: var(--c-ink); }
.lightbox__figure img {
  width: 100%;
  height: 100%;
  max-height: min(90svh, 46rem);
  object-fit: cover;
}

.lightbox__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(1.5rem, 3vw, 3rem);
  overflow-y: auto;
}
.lightbox__cat {
  margin-bottom: var(--sp-3);
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-accent-hi);
}
.lightbox__title {
  font-size: clamp(1.5rem, 2.2vw, 2.125rem);
  text-transform: uppercase;
  margin-bottom: var(--sp-4);
}
.lightbox__desc { color: var(--c-muted-dark); }
.lightbox__body .link-arrow { color: var(--c-warm-white); }

.lightbox__close,
.lightbox__arrow {
  position: absolute;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius);
  background: rgba(8, 32, 47, 0.7);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.lightbox__close:hover,
.lightbox__arrow:hover { background: var(--c-accent); border-color: var(--c-accent); }

.lightbox__close { top: var(--sp-4); right: var(--sp-4); z-index: 2; }
.lightbox__close::before,
.lightbox__close::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 15px; height: 1.5px;
  background: var(--c-white);
}
.lightbox__close::before { transform: translate(-50%, -50%) rotate(45deg); }
.lightbox__close::after  { transform: translate(-50%, -50%) rotate(-45deg); }

.lightbox__nav { position: static; }
.lightbox__arrow { bottom: var(--sp-4); left: var(--sp-4); }
.lightbox__arrow--next { left: calc(var(--sp-4) + 3.25rem); }
.lightbox__arrow::before {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 9px; height: 9px;
  border-left: 1.5px solid var(--c-white);
  border-bottom: 1.5px solid var(--c-white);
  transform: translate(-40%, -50%) rotate(45deg);
}
.lightbox__arrow--next::before { transform: translate(-60%, -50%) rotate(-135deg); }


/* ============================================================
   11. WHY TEKTON
   ============================================================ */
.advantages {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.5rem, 2.5vw, 2.5rem);
}
.advantage {
  padding-top: var(--sp-6);
  border-top: 1px solid var(--c-line-dark);
}
.advantage__num {
  display: block;
  margin-bottom: var(--sp-5);
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 4vw, 3.75rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px var(--c-accent-hi);
}
.advantage__title {
  font-size: var(--fs-h3);
  margin-bottom: var(--sp-3);
  text-transform: uppercase;
}
.advantage__desc { color: var(--c-muted-dark); font-size: var(--fs-small); line-height: 1.7; }


/* ============================================================
   12. PROCESS
   ============================================================ */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.5rem, 2.5vw, 2.5rem);
  counter-reset: step;
}
.step {
  position: relative;
  padding-top: var(--sp-7);
  border-top: 1px solid var(--c-line);
}
/* Node marker sitting on the connecting rule */
.step::before {
  content: "";
  position: absolute;
  left: 0; top: -4.5px;
  width: 8px; height: 8px;
  background: var(--c-accent);
  border-radius: 50%;
}
.step__num {
  display: block;
  margin-bottom: var(--sp-3);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--c-accent-text);
}
.step__title {
  font-size: var(--fs-h3);
  margin-bottom: var(--sp-3);
  text-transform: uppercase;
}
.step__desc { color: var(--c-muted); font-size: var(--fs-small); line-height: 1.7; }


/* ============================================================
   13. TESTIMONIALS
   ============================================================ */
.testimonials { background: var(--c-bone); }

.slider { position: relative; max-width: 64rem; }

.slider__track {
  display: grid;
  align-items: start;
}
.slide {
  grid-area: 1 / 1;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease-out);
}
.slide.is-current { opacity: 1; visibility: visible; transform: none; }

.quote { margin: 0; }
.quote p {
  position: relative;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.2vw, 2rem);
  font-weight: 500;
  line-height: 1.42;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}
.quote p::before {
  content: "“";
  display: block;
  font-size: 3.5rem;
  line-height: 0.8;
  color: var(--c-accent);
  margin-bottom: var(--sp-3);
}
.quote__meta {
  margin-top: var(--sp-6);
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-concrete);
}

.slider__controls {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-top: clamp(2rem, 3vw, 3rem);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--c-line);
}
.slider__btn {
  position: relative;
  width: 2.75rem;
  height: 2.75rem;
  flex: none;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: transparent;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.slider__btn:hover { background: var(--c-ink); border-color: var(--c-ink); }
.slider__btn::before {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 8px; height: 8px;
  border-left: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translate(-40%, -50%) rotate(45deg);
  transition: border-color var(--dur) var(--ease);
}
.slider__btn--next::before { transform: translate(-60%, -50%) rotate(-135deg); }
.slider__btn:hover::before { border-color: var(--c-white); }

.slider__dots { display: flex; gap: var(--sp-2); margin-left: auto; }
.slider__dot {
  width: 2rem;
  height: 2px;
  padding: 0;
  border: 0;
  background: var(--c-line);
  transition: background-color var(--dur) var(--ease);
}
.slider__dot.is-current { background: var(--c-accent); }
.slider__dot:hover { background: var(--c-concrete); }


/* ============================================================
   14. CTA BAND
   ============================================================ */
.cta {
  position: relative;
  display: grid;
  place-items: center;
  min-height: clamp(24rem, 46vw, 34rem);
  padding-block: var(--sp-10);
  overflow: hidden;
  background: var(--c-ink);
  color: var(--c-white);
  text-align: center;
}
.cta__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.cta__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8,32,47,0.86), rgba(8,32,47,0.92));
}
.cta__inner { position: relative; }
.cta__title {
  font-size: var(--fs-h2);
  text-transform: uppercase;
  margin-bottom: var(--sp-5);
}
.cta__text {
  max-width: 38rem;
  margin-inline: auto;
  margin-bottom: var(--sp-8);
  font-size: var(--fs-lead);
  color: rgba(255, 255, 255, 0.8);
}


/* ============================================================
   15. CONTACT + FORM
   ============================================================ */
.contact__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.contact__list {
  display: grid;
  gap: var(--sp-5);
  margin-top: clamp(2rem, 3vw, 3rem);
  padding-top: var(--sp-7);
  border-top: 1px solid var(--c-line);
}
.contact__item {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: var(--sp-4);
  align-items: baseline;
}
.contact__label {
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-concrete);
}
.contact__value {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
}
.contact__value a:hover { color: var(--c-accent-text); }

/* --- Form ------------------------------------------------- */
.form {
  padding: clamp(1.5rem, 3vw, 2.75rem);
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.form__title {
  font-size: var(--fs-h3);
  text-transform: uppercase;
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--c-line);
}
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-4);
}
.field { margin-bottom: var(--sp-5); }
.field label {
  display: block;
  margin-bottom: var(--sp-2);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
}
.field label span { color: var(--c-accent-text); }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--c-warm-white);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.field textarea { resize: vertical; min-height: 8rem; }
.field select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--c-muted) 50%),
                    linear-gradient(135deg, var(--c-muted) 50%, transparent 50%);
  background-position: calc(100% - 20px) 55%, calc(100% - 14px) 55%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 2.75rem;
}
.field input:hover,
.field select:hover,
.field textarea:hover { border-color: var(--c-concrete); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  background: var(--c-white);
  border-color: var(--c-accent);
  outline: none;
  box-shadow: 0 0 0 3px var(--c-accent-dim);
}

.field__error {
  margin: var(--sp-2) 0 0;
  min-height: 0;
  font-size: 0.75rem;
  color: var(--c-error);
}
.field.has-error input,
.field.has-error select,
.field.has-error textarea { border-color: var(--c-error); }

/* Honeypot — visually removed but still reachable by bots */
.field--hp {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.form__status {
  margin: var(--sp-4) 0 0;
  font-size: var(--fs-small);
  line-height: 1.6;
}
.form__status.is-success {
  padding: var(--sp-4) var(--sp-5);
  background: var(--c-accent-dim);
  border-left: 2px solid var(--c-accent);
  color: var(--c-ink);
}
.form__status.is-error { color: var(--c-error); }


/* ============================================================
   16. FOOTER + BACK TO TOP
   ============================================================ */
.footer {
  padding-top: clamp(3.5rem, 6vw, 6rem);
  padding-bottom: var(--sp-6);
  background: var(--c-ink);
  color: var(--c-muted-dark);
  font-size: var(--fs-small);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1.2fr;
  gap: clamp(2rem, 4vw, 4rem);
  padding-bottom: clamp(2.5rem, 4vw, 4rem);
  border-bottom: 1px solid var(--c-line-dark);
}

.footer__tagline {
  max-width: 22rem;
  margin-bottom: var(--sp-5);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-accent-hi);
}
.footer__social {
  display: inline-flex;
  gap: var(--sp-2);
  padding-bottom: 2px;
  border-bottom: 1px solid var(--c-line-dark);
  color: var(--c-warm-white);
  font-size: 0.8125rem;
}
.footer__social span { color: var(--c-concrete); }
.footer__social:hover { border-bottom-color: var(--c-accent-hi); color: var(--c-accent-hi); }

.footer__heading {
  margin-bottom: var(--sp-5);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--c-warm-white);
}
.footer__col ul { display: grid; gap: var(--sp-3); }
.footer__col a:hover { color: var(--c-accent-hi); }

.footer__bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-3);
  padding-top: var(--sp-6);
  font-size: 0.75rem;
  color: var(--c-concrete);
}
.footer__bar p { margin: 0; }
.footer__motto { letter-spacing: 0.2em; text-transform: uppercase; }

.to-top {
  position: fixed;
  right: clamp(1rem, 2.5vw, 2rem);
  bottom: clamp(1rem, 2.5vw, 2rem);
  z-index: 90;
  width: 3rem;
  height: 3rem;
  border: 1px solid var(--c-line-dark);
  border-radius: var(--radius);
  background: var(--c-ink);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}
.to-top[hidden] { display: none; }
.to-top.is-visible { opacity: 1; transform: none; }
.to-top:hover { background: var(--c-accent); border-color: var(--c-accent); }
.to-top::before {
  content: "";
  position: absolute;
  left: 50%; top: 54%;
  width: 9px; height: 9px;
  border-left: 1.5px solid var(--c-white);
  border-top: 1.5px solid var(--c-white);
  transform: translate(-50%, -50%) rotate(45deg);
}


/* ============================================================
   17. SCROLL REVEAL
   ============================================================ */
/* Scoped to .js so the page stays fully visible without JavaScript */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

/* Stagger children inside grids that reveal item-by-item */
.js .services__grid .reveal,
.js .advantages .reveal,
.js .steps .reveal { transition-delay: calc(var(--i, 0) * 70ms); }

/* Broken/missing image fallback — keeps the layout intact */
.img-fallback {
  background:
    linear-gradient(135deg, var(--c-charcoal) 0%, var(--c-charcoal-2) 55%, #2b2f35 100%);
  position: relative;
}
.img-fallback img { opacity: 0; }
.img-fallback::after {
  content: "Image";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 0.625rem;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.35);
}


/* ============================================================
   18. RESPONSIVE
   ============================================================ */

/* --- ≤1180px : tighter grids ----------------------------- */
@media (max-width: 1180px) {
  .footer__grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

/* --- ≤1024px : tablet landscape -------------------------- */
@media (max-width: 1024px) {
  :root { --header-h: 74px; }

  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .service--wide .service__media { aspect-ratio: 21 / 8; }

  .advantages,
  .steps { grid-template-columns: repeat(2, 1fr); }

  .gallery { grid-auto-rows: 10rem; }

  .lightbox__panel { grid-template-columns: 1fr; max-height: 88svh; }
  .lightbox__figure img { max-height: 40svh; }
  .lightbox__arrow { position: relative; bottom: auto; left: auto; }
  .lightbox__arrow--next { left: auto; }
  .lightbox__nav {
    display: flex;
    gap: var(--sp-2);
    padding: 0 clamp(1.5rem, 3vw, 3rem) clamp(1.5rem, 3vw, 3rem);
  }
}

/* --- ≤900px : mobile navigation + stacked layouts --------- */
@media (max-width: 900px) {
  .nav-toggle { display: grid; }

  .nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(23rem, 86vw);
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: var(--sp-8);
    padding: calc(var(--header-h) + var(--sp-6)) clamp(1.75rem, 6vw, 2.75rem) var(--sp-8);
    background: var(--c-ink);
    border-left: 1px solid var(--c-line-dark);
    transform: translateX(100%);
    transition: transform 0.42s var(--ease-out);
    overflow-y: auto;
  }
  .nav.is-open { transform: none; }

  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__list li { border-bottom: 1px solid var(--c-line-dark); }
  .nav__link {
    display: block;
    padding-block: var(--sp-4);
    font-size: 1rem;
    letter-spacing: 0.08em;
  }
  .nav__link::after { display: none; }
  .nav__link.is-active { color: var(--c-accent-hi); }
  .nav__cta { justify-content: center; padding-block: 1rem; }

  .about__grid,
  .contact__grid { grid-template-columns: 1fr; }
  .about__media { order: -1; max-width: 34rem; }
  .about__media img { aspect-ratio: 4 / 3; }

  .section__head--split { grid-template-columns: 1fr; align-items: start; }

  .gallery { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 9rem; }
  .project,
  .project--tall,
  .project--wide,
  .project--small { grid-column: span 1; grid-row: span 2; }
  .project--tall { grid-row: span 2; }

  .contact__item { grid-template-columns: 6.5rem 1fr; }

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

/* --- ≤680px : phones ------------------------------------- */
@media (max-width: 680px) {
  :root { --header-h: 68px; }

  .hero { min-height: 92svh; }
  .hero__actions .btn { flex: 1 1 100%; }

  .services__grid { grid-template-columns: 1fr; }
  .service__media,
  .service--wide .service__media { aspect-ratio: 16 / 10; }

  .advantages,
  .steps { grid-template-columns: 1fr; gap: var(--sp-6); }

  .stats { grid-template-columns: 1fr; gap: var(--sp-5); }
  .stat { display: flex; align-items: baseline; gap: var(--sp-4); }
  .stat__value { flex: 1 1 auto; }
  .stat__label { margin-top: 0; text-align: right; }

  .form__row { grid-template-columns: 1fr; gap: 0; }

  .about__media-tag { right: 0.75rem; bottom: 0.75rem; }

  .filters { gap: var(--sp-1); }
  .filter { padding: 0.5rem 0.875rem; font-size: 0.625rem; }
}

/* --- ≤430px : small phones ------------------------------- */
@media (max-width: 430px) {
  .gallery { grid-template-columns: 1fr; grid-auto-rows: 12rem; }
  .project, .project--tall { grid-row: span 1; }
  .footer__grid { grid-template-columns: 1fr; }
  .brand__sub { letter-spacing: 0.2em; }
  .scroll-cue { display: none; }
}


/* ============================================================
   MOTION PREFERENCES & PRINT
   ============================================================ */
@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;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .nav, .to-top, .scroll-cue, .lightbox, .filters { display: none !important; }
  body { background: #fff; color: #000; }
  .section--dark, .cta, .footer { background: #fff !important; color: #000 !important; }
}