/* =========================================================================
   KAVAA — design tokens
   Palette drawn from the client's logo (warm gold #B8A05C, ink black) plus
   a cool slate for the technical/engineering counterpoint, and a sand
   background echoing both the Sahara context and blueprint paper.
   ========================================================================= */
:root {
  --kavaa-ink: #14130f;
  --kavaa-ink-soft: #2b2924;
  --kavaa-gold: #b8a05c;
  --kavaa-gold-deep: #8a763f;
  --kavaa-sand: #f3efe4;
  --kavaa-sand-dark: #e7e0cd;
  --kavaa-slate: #44505c;
  --kavaa-slate-light: #7d8a94;
  --kavaa-white: #ffffff;

  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --radius: 2px;
  --container: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--kavaa-ink);
  background: var(--kavaa-sand);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .display {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  color: var(--kavaa-ink);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--kavaa-gold-deep);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: '';
  width: 26px;
  height: 1px;
  background: var(--kavaa-gold-deep);
  display: inline-block;
}

/* -------------------------------------------------------------------------
   Header / Navigation
   ------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--kavaa-white);
  border-bottom: 1px solid rgba(184, 160, 92, 0.35);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand img {
  height: 60px;
  width: auto;
  background: var(--kavaa-white);
  padding: 2px 4px;
  border-radius: var(--radius);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-family: var(--font-display);
  font-size: 0.92rem;
  color: var(--kavaa-ink);
  padding: 10px 16px;
  border-radius: var(--radius);
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--kavaa-ink);
  background: var(--kavaa-gold);
}
.lang-switch {
  display: flex;
  gap: 2px;
  margin-left: 12px;
  border: 1px solid rgba(184, 160, 92, 0.5);
  border-radius: var(--radius);
  overflow: hidden;
}
.lang-switch button {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  background: transparent;
  border: none;
  color: var(--kavaa-slate-light);
  padding: 7px 10px;
  cursor: pointer;
}
.lang-switch button.active {
  background: var(--kavaa-gold);
  color: var(--kavaa-ink);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--kavaa-sand);
  font-size: 1.4rem;
  cursor: pointer;
}

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--kavaa-ink);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 24px 16px;
    display: none;
    border-bottom: 1px solid rgba(184,160,92,.35);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 8px; }
  .lang-switch { margin: 10px 8px 0; align-self: flex-start; }
}

/* -------------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 13px 26px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-gold {
  background: var(--kavaa-gold);
  color: var(--kavaa-ink);
}
.btn-gold:hover { background: var(--kavaa-gold-deep); color: var(--kavaa-white); }
.btn-outline {
  border-color: rgba(20,19,15,0.25);
  color: var(--kavaa-ink);
  background: transparent;
}
.btn-outline:hover { border-color: var(--kavaa-ink); background: var(--kavaa-ink); color: var(--kavaa-sand); }
.btn-outline-light {
  border-color: rgba(243,239,228,0.4);
  color: var(--kavaa-sand);
}
.btn-outline-light:hover { background: var(--kavaa-sand); color: var(--kavaa-ink); }

/* -------------------------------------------------------------------------
   Cover banner — client-provided photo, full-bleed above the hero
   ------------------------------------------------------------------------- */
.cover-banner {
  padding: 0;
  line-height: 0;
  border-bottom: 1px solid rgba(184, 160, 92, 0.35);
}
.cover-banner img {
  width: 100%;
  height: auto;
  max-height: 640px;
  object-fit: cover;
  object-position: center top;
}

/* -------------------------------------------------------------------------
   Hero — technical drawing frame with tick-mark ruler border
   ------------------------------------------------------------------------- */
.hero {
  position: relative;
  background: var(--kavaa-ink);
  color: var(--kavaa-sand);
  padding: 90px 0 70px;
  overflow: hidden;
}
.hero::before {
  /* Coordinate ruler ticks along the top, referencing a technical drawing */
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 18px;
  background-image: repeating-linear-gradient(
    90deg, rgba(184,160,92,0.45) 0, rgba(184,160,92,0.45) 1px,
    transparent 1px, transparent 40px
  );
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.1rem, 4vw, 3.4rem);
  line-height: 1.08;
  color: var(--kavaa-white);
}
.hero h1 em {
  font-style: normal;
  color: var(--kavaa-gold);
}
.hero p.lead {
  font-family: var(--font-body);
  font-size: 1.12rem;
  color: rgba(243,239,228,0.82);
  max-width: 46ch;
  margin-bottom: 30px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Schematic compass / contour diagram used as the hero's signature visual */
.hero-diagram {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 420px;
  justify-self: end;
}
.hero-diagram svg { width: 100%; height: 100%; }
.hero-diagram .tag {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--kavaa-gold);
  background: rgba(20,19,15,0.7);
  border: 1px solid rgba(184,160,92,0.4);
  padding: 3px 7px;
  border-radius: var(--radius);
}
.tag-1 { top: 8%; left: -4%; }
.tag-2 { bottom: 10%; right: -2%; }

@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-diagram { justify-self: center; max-width: 300px; margin-top: 20px; }
}

/* -------------------------------------------------------------------------
   Section scaffolding
   ------------------------------------------------------------------------- */
section { padding: 78px 0; }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 42px;
  border-bottom: 1px solid rgba(20,19,15,0.12);
  padding-bottom: 22px;
}
.section-head h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
.section-head .desc { max-width: 52ch; color: var(--kavaa-slate); }

.bg-white { background: var(--kavaa-white); }
.bg-ink { background: var(--kavaa-ink); color: var(--kavaa-sand); }
.bg-ink h2, .bg-ink h3 { color: var(--kavaa-white); }
.bg-ink .section-head { border-bottom-color: rgba(243,239,228,0.15); }
.bg-ink .section-head .desc { color: rgba(243,239,228,0.75); }

/* -------------------------------------------------------------------------
   Services — engineering index / legend layout
   ------------------------------------------------------------------------- */
.index-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(20,19,15,0.12);
  border: 1px solid rgba(20,19,15,0.12);
}
.index-item {
  background: var(--kavaa-white);
  padding: 30px 28px;
  display: flex;
  gap: 18px;
}
.index-code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--kavaa-gold-deep);
  border: 1px solid rgba(184,160,92,0.5);
  border-radius: var(--radius);
  padding: 3px 8px;
  height: fit-content;
  white-space: nowrap;
}
.index-item h3 { font-size: 1.05rem; margin-bottom: 8px; }
.index-item p { margin: 0; color: var(--kavaa-slate); font-size: 0.96rem; }
.index-icon { color: var(--kavaa-gold-deep); flex-shrink: 0; }

@media (max-width: 700px) {
  .index-list { grid-template-columns: 1fr; }
}

/* -------------------------------------------------------------------------
   Gallery / réalisations
   ------------------------------------------------------------------------- */
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 36px;
}
.filter-chip {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  padding: 8px 14px;
  border: 1px solid rgba(20,19,15,0.2);
  border-radius: 999px;
  color: var(--kavaa-ink);
  background: var(--kavaa-white);
}
.filter-chip.active,
.filter-chip:hover { background: var(--kavaa-ink); color: var(--kavaa-sand); border-color: var(--kavaa-ink); }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.gallery-card {
  background: var(--kavaa-white);
  border: 1px solid rgba(20,19,15,0.1);
  overflow: hidden;
}
.gallery-card .thumb {
  aspect-ratio: 4/3;
  background: var(--kavaa-sand-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--kavaa-slate-light);
  overflow: hidden;
}
.gallery-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.gallery-card .body { padding: 20px 22px; }
.gallery-card .meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--kavaa-gold-deep);
  margin-bottom: 6px;
  display: block;
}
.gallery-card h3 { font-size: 1.02rem; margin-bottom: 6px; }
.gallery-card p { color: var(--kavaa-slate); font-size: 0.92rem; margin: 0; }

@media (max-width: 980px) { .gallery-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 640px) { .gallery-grid { grid-template-columns: 1fr; } }

/* -------------------------------------------------------------------------
   About page
   ------------------------------------------------------------------------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(20,19,15,0.12);
  border: 1px solid rgba(20,19,15,0.12);
  margin: 46px 0;
}
.stat { background: var(--kavaa-white); padding: 26px 22px; text-align: center; }
.stat .num { font-family: var(--font-display); font-size: 2rem; color: var(--kavaa-gold-deep); font-weight: 700; }
.stat .label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: .05em; color: var(--kavaa-slate); text-transform: uppercase; }

@media (max-width: 700px) { .stat-row { grid-template-columns: repeat(2,1fr); } }

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.team-card { text-align: left; }
.team-card .photo {
  aspect-ratio: 3/4;
  background: var(--kavaa-sand-dark);
  margin-bottom: 12px;
  overflow: hidden;
}
.team-card .photo img { width: 100%; height: 100%; object-fit: cover; }
.team-card h4 { margin-bottom: 2px; font-size: 1rem; }
.team-card .role { font-family: var(--font-mono); font-size: 0.72rem; color: var(--kavaa-slate); text-transform: uppercase; letter-spacing: .04em; }

@media (max-width: 880px) { .team-grid { grid-template-columns: repeat(2,1fr); } }

/* -------------------------------------------------------------------------
   Contact page
   ------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}
.contact-info-item {
  display: flex;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(243,239,228,0.15);
}
.contact-info-item .k { font-family: var(--font-mono); font-size: 0.7rem; color: var(--kavaa-gold); text-transform: uppercase; letter-spacing: .06em; min-width: 90px; }
.map-embed { margin-top: 26px; border: 1px solid rgba(243,239,228,0.2); }
.map-embed iframe { width: 100%; height: 260px; border: 0; display: block; filter: grayscale(0.2); }

.form-control {
  width: 100%;
  padding: 13px 14px;
  font-family: var(--font-body);
  font-size: 0.98rem;
  border: 1px solid rgba(20,19,15,0.25);
  border-radius: var(--radius);
  background: var(--kavaa-white);
  color: var(--kavaa-ink);
  margin-bottom: 16px;
}
.form-control:focus {
  outline: 2px solid var(--kavaa-gold-deep);
  outline-offset: 1px;
}
label { font-family: var(--font-display); font-size: 0.85rem; display: block; margin-bottom: 6px; }
.honeypot-field { position: absolute; left: -9999px; }

.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  margin-bottom: 22px;
  font-family: var(--font-display);
  font-size: 0.92rem;
}
.alert-success { background: rgba(184,160,92,0.18); border: 1px solid rgba(184,160,92,0.5); color: var(--kavaa-gold-deep); }

@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }

/* -------------------------------------------------------------------------
   Footer
   ------------------------------------------------------------------------- */
.site-footer {
  background: var(--kavaa-ink);
  color: rgba(243,239,228,0.75);
  padding: 50px 0 26px;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(243,239,228,0.12);
}
.footer-grid h4 {
  color: var(--kavaa-gold);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-family: var(--font-mono);
  margin-bottom: 16px;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a:hover { color: var(--kavaa-gold); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 22px;
  font-size: 0.8rem;
  color: rgba(243,239,228,0.5);
}

/* -------------------------------------------------------------------------
   Reduced motion respect
   ------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

/* Focus visibility for keyboard users */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--kavaa-gold-deep);
  outline-offset: 2px;
}