/* ═══════════════════════════════════════
   KIROS — styles.css  v2026-09-10
   Archetype 07 Modified Precision Grid
   ═══════════════════════════════════════ */

/* ─── Tokens ─── */
:root {
  --bg:         #e6e6e6;
  --bg-2:       #d8d8d8;
  --bg-3:       #efefef;
  --white:      #f5f5f5;
  --ink:        #0a0a0a;
  --ink-soft:   #2a2a2a;
  --ink-mute:   #666666;
  --navy:       #0d1b3e;
  --navy-2:     #162952;
  --navy-3:     #1e3870;
  --navy-light: rgba(13,27,62,0.08);
  --navy-glow:  rgba(13,27,62,0.25);
  --white-a70:  rgba(245,245,245,0.70);
  --white-a90:  rgba(245,245,245,0.90);

  --sans: 'Manrope','Inter','Helvetica Neue',sans-serif;
  --body: 'Inter','Helvetica Neue',sans-serif;
  --mono: 'JetBrains Mono','Fira Mono',monospace;

  --fs-hero:    clamp(3.2rem,7.5vw,6.4rem);
  --fs-h2:      clamp(2rem,4.5vw,3.6rem);
  --fs-h3:      clamp(1.25rem,2.2vw,1.8rem);
  --fs-label:   0.72rem;
  --fs-body:    1rem;
  --fs-small:   0.875rem;

  --sp-section: clamp(5rem,10vw,8rem);
  --sp-half:    clamp(2.5rem,5vw,4rem);
  --nav-h:      72px;
  --container:  1280px;
  --grid-gap:   clamp(1rem,2vw,1.5rem);

  --radius:     4px;
  --radius-lg:  10px;
  --transition: 0.35s cubic-bezier(0.25,0.46,0.45,0.94);
  --transition-slow: 0.65s cubic-bezier(0.25,0.46,0.45,0.94);
}

/* ─── Reset ─── */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}
img,svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul,ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ─── Utility ─── */
.skip-link {
  position: fixed; top: -100%; left: 1rem;
  background: var(--navy); color: var(--white);
  padding: 0.5rem 1rem; z-index: 9999; border-radius: var(--radius);
  transition: top 0.2s;
}
.skip-link:focus { top: 1rem; }
.container {
  width: 100%; max-width: var(--container);
  margin: 0 auto; padding: 0 clamp(1.25rem,5vw,3rem);
}
.mono { font-family: var(--mono); letter-spacing: 0.06em; }
.section-label {
  font-size: var(--fs-label); text-transform: uppercase;
  letter-spacing: 0.16em; color: var(--navy); margin-bottom: 1.5rem;
}
.section-title {
  font-family: var(--sans); font-weight: 700; color: var(--ink);
  line-height: 1.1; font-size: var(--fs-h2); margin-bottom: 1.5rem;
}
.section-intro {
  font-size: 1.05rem; color: var(--ink-soft); max-width: 56ch;
  line-height: 1.7;
}
.section-header { margin-bottom: clamp(2.5rem,5vw,4rem); }
.section-header--split {
  display: flex; gap: 3rem; align-items: flex-start;
  flex-wrap: wrap;
}
.section-header--split .section-intro { flex: 1; min-width: 260px; margin-top: 1rem; }

/* ─── Reveal animations ─── */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-split] { opacity: 1; transform: none; }

/* ─── Buttons ─── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--sans); font-weight: 600; font-size: 0.875rem;
  letter-spacing: 0.04em; padding: 0.75rem 1.75rem;
  border-radius: var(--radius); transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--navy); color: var(--white);
}
.btn-primary:hover {
  background: var(--navy-3); transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--navy-glow);
}
.btn-ghost {
  background: transparent; color: var(--ink);
  border: 1.5px solid rgba(10,10,10,0.25);
}
.btn-ghost:hover {
  border-color: var(--navy); color: var(--navy);
  transform: translateY(-2px);
}
.btn-nav {
  background: var(--navy); color: var(--white);
  padding: 0.55rem 1.25rem; font-size: 0.8125rem;
}
.btn-nav:hover { background: var(--navy-3); }

/* ══════ NAV ══════ */
#nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 900; height: var(--nav-h);
  /* near-opaque light ground so the multiply-blended logo reads cleanly even
     where the nav sits over the dark hero */
  background: rgba(243,244,247,0.92);
  backdrop-filter: blur(18px) saturate(1.5);
  -webkit-backdrop-filter: blur(18px) saturate(1.5);
  transition: background var(--transition), box-shadow var(--transition);
}
#nav.scrolled {
  background: rgba(238,239,242,0.97);
  backdrop-filter: blur(24px) saturate(1.8);
  -webkit-backdrop-filter: blur(24px) saturate(1.8);
  box-shadow: 0 1px 0 rgba(0,0,0,0.10);
}
.nav-inner {
  max-width: var(--container); margin: 0 auto;
  padding: 0 clamp(1.25rem,5vw,3rem);
  height: var(--nav-h); display: flex; align-items: center; gap: 2rem;
}
.nav-brand { flex-shrink: 0; display: flex; align-items: center; }

/* kiros-name.jpg / kiros-logo.jpg are dark artwork on a cool off-white ground
   (~rgb(240,243,246), no borders). brightness() lifts that ground to pure white,
   then mix-blend-mode: multiply erases it against the light nav so only the
   artwork remains — no visible panel. */

/* The wrap literally shrinks on scroll: 200px -> 44px. With overflow:hidden the
   "KIROS" wordmark is clipped away toward the icon, reading as the logo
   "reducing" down to just the mark. */
.nav-logo-wrap {
  display: block;
  position: relative;
  height: 44px; width: 200px;
  flex-shrink: 0;
  overflow: hidden;
  transition: width 0.55s cubic-bezier(0.55,0.06,0.28,0.98);
}
#nav.scrolled .nav-logo-wrap { width: 44px; }

.nav-logo-name,
.nav-logo-symbol {
  position: absolute; left: 0; top: 50%;
  transform-origin: left center;
  background-repeat: no-repeat;
  mix-blend-mode: multiply;
  filter: brightness(1.09) contrast(1.03);
  transition: opacity 0.4s cubic-bezier(0.25,0.46,0.45,0.94),
              transform 0.55s cubic-bezier(0.55,0.06,0.28,0.98);
}
/* Name: full "icon + KIROS" lockup, anchored left so the icon is what remains
   once the wrap narrows. */
.nav-logo-name {
  width: 200px; height: 40px;
  background-image: url('assets/img/kiros-name.jpg');
  background-size: 200px auto;
  background-position: left center;
  opacity: 1;
  transform: translateY(-50%) scale(1);
}
/* Symbol: the crisp standalone mark that settles in once collapsed. */
.nav-logo-symbol {
  width: 44px; height: 42px;
  background-image: url('assets/img/kiros-logo.jpg');
  background-size: 264px auto;
  background-position: center center;
  opacity: 0;
  transform: translateY(-50%) scale(0.72);
}
#nav.scrolled .nav-logo-name {
  opacity: 0;
  transform: translateY(-50%) scale(0.88);
  transition-delay: 0.12s;          /* stays visible through most of the shrink */
}
#nav.scrolled .nav-logo-symbol {
  opacity: 1;
  transform: translateY(-50%) scale(1);
  transition-delay: 0.22s;          /* lands after the collapse completes */
}
.nav-links {
  display: flex; gap: 1.75rem; flex: 1;
}
.nav-links a {
  font-family: var(--sans); font-size: 0.875rem; font-weight: 500;
  color: var(--ink-soft); position: relative; padding: 0.25rem 0;
  transition: color var(--transition);
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -2px; left: 0;
  width: 0; height: 1.5px; background: var(--navy);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--navy); }
.nav-links a:hover::after { width: 100%; }
.nav-right {
  display: flex; align-items: center; gap: 1.25rem; flex-shrink: 0;
}

/* Language toggle */
.lang-toggle {
  display: flex; align-items: center; gap: 0.4rem;
}
.lang-sep { color: var(--ink-mute); font-size: 0.75rem; }
.lang-btn {
  font-family: var(--mono); font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.1em; color: var(--ink-mute);
  padding: 0.3rem 0.5rem; border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}
.lang-btn:hover { color: var(--navy); }
.lang-btn.is-active {
  color: var(--navy); background: var(--navy-light); font-weight: 700;
}

/* Mobile toggle */
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  padding: 0.5rem; border-radius: var(--radius);
  transition: var(--transition);
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--ink); border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav */
.nav-mobile {
  position: fixed; inset: var(--nav-h) 0 0;
  background: var(--bg); padding: 2rem clamp(1.25rem,5vw,3rem);
  display: flex; flex-direction: column; gap: 2rem;
  transform: translateX(100%); transition: transform 0.4s cubic-bezier(0.25,0.46,0.45,0.94);
  z-index: 899; overflow-y: auto;
}
.nav-mobile.is-open { transform: translateX(0); }
.nav-mobile ul { display: flex; flex-direction: column; gap: 1.25rem; }
.nav-mobile a {
  font-family: var(--sans); font-size: 1.5rem; font-weight: 700;
  color: var(--ink);
}
.mobile-lang { display: flex; gap: 1rem; }
.mobile-lang .lang-btn { font-size: 0.875rem; padding: 0.5rem 0.75rem; }

/* ══════ HERO full-screen ══════ */
.section-hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: flex-end;
  padding-bottom: clamp(4rem,8vw,7rem);
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center top;
  background-repeat: no-repeat;
  transform: scale(1.05);
  transition: transform 8s cubic-bezier(0.25,0.46,0.45,0.94);
}
.section-hero:hover .hero-bg { transform: scale(1.0); }

/* Gradient fade: image at top, ink bg at bottom */
.hero-fade {
  position: absolute; inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10,10,10,0.10) 0%,
    rgba(10,10,10,0.25) 35%,
    rgba(10,10,10,0.60) 65%,
    rgba(10,10,10,0.85) 100%
  );
}

.hero-content {
  position: relative; z-index: 2;
  max-width: 860px;
}
.hero-eyebrow {
  font-size: var(--fs-label); text-transform: uppercase; letter-spacing: 0.18em;
  color: rgba(245,245,245,0.65); margin-bottom: 1.5rem;
}
.hero-title {
  font-family: var(--sans); font-weight: 800; color: var(--white);
  font-size: var(--fs-hero); line-height: 1.05;
  margin-bottom: 1.5rem;
}
.hero-title em {
  font-style: normal; color: rgba(245,245,245,0.65);
}
.hero-sub {
  font-size: clamp(1rem,1.6vw,1.2rem); color: rgba(245,245,245,0.80);
  max-width: 50ch; line-height: 1.7; margin-bottom: 2.25rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.hero-actions .btn-ghost {
  border-color: rgba(245,245,245,0.35); color: var(--white);
}
.hero-actions .btn-ghost:hover {
  border-color: var(--white); color: var(--white);
  background: rgba(245,245,245,0.1);
}
.hero-meta {
  font-size: 0.78rem; color: rgba(245,245,245,0.45);
  letter-spacing: 0.12em; text-transform: uppercase;
}

/* Scroll indicator */
.hero-scroll-indicator {
  position: absolute; bottom: 2rem; right: clamp(1.25rem,5vw,3rem);
  z-index: 2; display: flex; flex-direction: column;
  align-items: center; gap: 0.6rem;
}
.hero-scroll-indicator span.mono {
  font-size: 0.65rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: rgba(245,245,245,0.40);
  writing-mode: vertical-rl;
}
.scroll-line {
  width: 1px; height: 48px; background: rgba(245,245,245,0.25);
  position: relative; overflow: hidden;
}
.scroll-line::after {
  content: ''; position: absolute;
  top: -100%; left: 0; width: 100%; height: 100%;
  background: rgba(245,245,245,0.6);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%   { top: -100%; }
  100% { top: 100%; }
}

/* ══════ VALUE (Para empresas) ══════ */
.section-value {
  padding: var(--sp-section) 0;
  background: var(--white);
  border-bottom: 1px solid var(--bg-2);
}
.value-header {
  text-align: center; max-width: 640px; margin: 0 auto 3rem;
}
.value-title { font-size: clamp(1.75rem,3.5vw,2.8rem); }
.value-header .section-intro { margin: 0 auto; text-align: center; }

.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px,1fr));
  gap: var(--grid-gap);
}
.value-card {
  background: var(--bg); padding: 2rem 1.75rem;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0,0,0,0.07);
  transition: transform var(--transition), box-shadow var(--transition),
              border-color var(--transition);
  position: relative; overflow: hidden;
}
.value-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: var(--navy);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition);
}
.value-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.1); }
.value-card:hover::before { transform: scaleX(1); }
.value-card:hover { border-color: transparent; }
.value-num {
  display: block; font-size: 0.7rem; letter-spacing: 0.2em;
  color: var(--navy); margin-bottom: 1rem;
}
.value-card-title {
  font-family: var(--sans); font-weight: 700; font-size: 1.1rem;
  color: var(--ink); margin-bottom: 0.75rem;
}
.value-card-desc { font-size: var(--fs-small); color: var(--ink-soft); line-height: 1.7; }

/* ══════ SYSTEMS ══════ */
.section-systems { padding: var(--sp-section) 0; background: var(--bg); }

.systems-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: var(--grid-gap);
}

.sys-card {
  position: relative; border-radius: var(--radius-lg);
  overflow: hidden; min-height: 340px;
  cursor: default;
}
/* 4th and 5th cards: row 2 */
.sys-card:nth-child(4) { grid-column: 1 / 2; }
.sys-card:nth-child(5) { grid-column: 2 / 4; }

.sys-card-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  filter: saturate(0.5) brightness(0.6);
  transition: transform 0.8s cubic-bezier(0.25,0.46,0.45,0.94),
              filter 0.8s;
}
.sys-card:hover .sys-card-bg {
  transform: scale(1.06);
  filter: saturate(0.7) brightness(0.5);
}

/* Navy gradient overlay */
.sys-card::before {
  content: ''; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(
    160deg,
    rgba(13,27,62,0.10) 0%,
    rgba(13,27,62,0.70) 100%
  );
  transition: background var(--transition);
}
.sys-card:hover::before {
  background: linear-gradient(
    160deg,
    rgba(13,27,62,0.20) 0%,
    rgba(13,27,62,0.85) 100%
  );
}

.sys-card-inner {
  position: relative; z-index: 2;
  padding: 2rem; height: 100%;
  display: flex; flex-direction: column; justify-content: flex-end;
}
.sys-num {
  display: block; font-size: 0.68rem; letter-spacing: 0.2em;
  color: rgba(245,245,245,0.55); margin-bottom: 0.75rem;
  transform: translateY(8px); transition: transform var(--transition);
}
.sys-title {
  font-family: var(--sans); font-weight: 700; font-size: 1.2rem;
  color: var(--white); margin-bottom: 0.75rem;
  transform: translateY(8px); transition: transform var(--transition) 0.04s;
}
.sys-desc {
  font-size: 0.875rem; color: rgba(245,245,245,0.70);
  line-height: 1.65; max-width: 42ch;
  opacity: 0; transform: translateY(12px);
  transition: opacity var(--transition) 0.07s, transform var(--transition) 0.07s;
}
.sys-card:hover .sys-num,
.sys-card:hover .sys-title { transform: translateY(0); }
.sys-card:hover .sys-desc { opacity: 1; transform: translateY(0); }

/* ══════ ENGINE ══════ */
.section-engine {
  padding: var(--sp-section) 0;
  position: relative;
  background: var(--navy);
  overflow: hidden;
}
.engine-section-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.10; filter: saturate(0) brightness(2);
}
.engine-layout {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(3rem,6vw,5rem); align-items: center;
}
.section-engine .section-label { color: rgba(245,245,245,0.45); }
.section-engine .section-title { color: var(--white); }
.engine-intro { font-size: 1.05rem; color: rgba(245,245,245,0.65); margin-bottom: 2.5rem; }

.engine-flow { display: flex; flex-direction: column; gap: 0; }
.engine-step {
  display: grid; grid-template-columns: 2.5rem 1fr 1fr;
  align-items: center; gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid rgba(245,245,245,0.08);
  transition: background var(--transition);
}
.engine-step:first-child { border-top: 1px solid rgba(245,245,245,0.08); }
.engine-step:hover { background: rgba(245,245,245,0.03); }
.engine-step-num { font-size: 0.68rem; color: rgba(245,245,245,0.30); letter-spacing: 0.15em; }
.engine-step-name { font-family: var(--sans); font-weight: 600; font-size: 0.9rem; color: var(--white); }
.engine-step-desc { font-size: 0.8rem; color: rgba(245,245,245,0.45); }

.engine-img-wrap {
  border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 1;
  box-shadow: 0 32px 64px rgba(0,0,0,0.4);
}
.engine-img-wrap img {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(0.6) contrast(1.1);
}

/* ══════ PROJECTS ══════ */
.section-projects { padding: var(--sp-section) 0; background: var(--white); }
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--grid-gap);
}
.project-card {
  background: var(--bg); border-radius: var(--radius-lg);
  padding: 2rem 2rem 1.75rem;
  border: 1px solid rgba(0,0,0,0.07);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex; flex-direction: column; gap: 0.75rem;
}
.project-featured {
  grid-column: 1 / -1;
  background: var(--navy); color: var(--white);
  border-color: transparent;
}
.project-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.1); }
.project-top {
  display: flex; justify-content: space-between; align-items: center;
}
.project-code { font-size: 0.68rem; color: var(--navy); }
.project-featured .project-code { color: rgba(245,245,245,0.45); }
.project-status { font-size: 0.68rem; color: var(--ink-mute); }
.project-featured .project-status { color: rgba(245,245,245,0.40); }
.project-name {
  font-family: var(--sans); font-weight: 800; font-size: 1.75rem; color: var(--ink);
}
.project-featured .project-name { color: var(--white); font-size: 2.2rem; }
.project-label { font-size: 0.75rem; color: var(--ink-mute); }
.project-featured .project-label { color: rgba(245,245,245,0.50); }
.project-desc { font-size: var(--fs-small); color: var(--ink-soft); line-height: 1.7; }
.project-featured .project-desc { color: rgba(245,245,245,0.70); }

/* ══════ RESEARCH ══════ */
.section-research {
  padding: var(--sp-section) 0;
  background: var(--bg); position: relative; overflow: hidden;
}
.research-visual {
  position: absolute; top: 0; right: -5%;
  width: 38%; height: 100%;
  background-size: cover; background-position: center;
  opacity: 0.06; pointer-events: none;
}
.research-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap); margin-bottom: 3rem;
  position: relative; z-index: 1;
}
.res-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 1.75rem; border: 1px solid rgba(0,0,0,0.06);
  display: flex; flex-direction: column; gap: 0.875rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.res-card:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.09); }
.res-card-meta { display: flex; justify-content: space-between; align-items: center; }
.res-cat { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--navy); }
.res-date { font-size: 0.68rem; color: var(--ink-mute); }
.res-title { font-family: var(--sans); font-weight: 700; font-size: 1rem; color: var(--ink); line-height: 1.4; }
.res-excerpt { font-size: 0.875rem; color: var(--ink-soft); line-height: 1.65; flex: 1; }
.res-link { font-size: 0.75rem; color: var(--navy); letter-spacing: 0.08em; transition: gap var(--transition); }
.res-link:hover { color: var(--navy-3); }
.research-more { text-align: center; position: relative; z-index: 1; }

/* ══════ ABOUT ══════ */
.section-about {
  padding: var(--sp-section) 0;
  background: var(--white); position: relative; overflow: hidden;
}
.about-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.06;
  filter: saturate(0) contrast(1.2);
}
.about-layout {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(3rem,6vw,5rem); align-items: center;
}
.about-content { max-width: 520px; }
.about-title {
  font-family: var(--sans); font-weight: 800; color: var(--ink);
  font-size: clamp(2.4rem,5vw,4rem); line-height: 1.08;
  margin-bottom: 2rem;
}
.about-body { display: flex; flex-direction: column; gap: 1.25rem; margin-bottom: 2.5rem; }
.about-body p { font-size: 1rem; color: var(--ink-soft); line-height: 1.75; }

.about-flow {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.about-flow span:not(.flow-arrow) {
  font-family: var(--mono); font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  background: var(--navy); color: var(--white);
  padding: 0.5rem 0.875rem; border-radius: var(--radius);
}
.flow-arrow { color: var(--ink-mute); font-size: 1.25rem; }

/* kiros-philosophy.jpg: dark converging-lines-to-form artwork on a white ground.
   multiply drops the white into the section background so the diagram sits
   directly on the page — a point resolving into structure = intention → execution. */
.about-visual {
  position: relative;
}
.about-visual img {
  display: block; width: 100%; height: auto;
  mix-blend-mode: multiply;
  filter: brightness(1.06) contrast(1.06);
}

/* ══════ CONTACT ══════ */
.section-contact { padding: var(--sp-section) 0; background: var(--bg); }
.contact-layout {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: clamp(3rem,6vw,5rem); align-items: start;
}
.contact-title {
  font-family: var(--sans); font-weight: 800; color: var(--ink);
  font-size: clamp(2rem,4.5vw,3.4rem); line-height: 1.1;
  margin-bottom: 1.25rem;
}
.contact-sub { color: var(--ink-soft); max-width: 44ch; margin-bottom: 2rem; }
.contact-options { display: flex; flex-direction: column; gap: 1rem; }

.btn-whatsapp {
  display: inline-flex; align-items: center; gap: 0.75rem;
  background: #25d366; color: #fff;
  font-family: var(--sans); font-weight: 600; font-size: 0.875rem;
  padding: 0.9rem 1.75rem; border-radius: var(--radius);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  width: fit-content;
}
.btn-whatsapp:hover {
  background: #1ebe5d; transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37,211,102,0.35);
}
.contact-email {
  font-size: 0.85rem; color: var(--ink-soft);
  letter-spacing: 0.04em; width: fit-content;
  border-bottom: 1px solid rgba(10,10,10,0.2);
  padding-bottom: 2px; transition: color var(--transition), border-color var(--transition);
}
.contact-email:hover { color: var(--navy); border-color: var(--navy); }

/* Form */
.contact-form {
  display: flex; flex-direction: column; gap: 1.25rem;
  background: var(--white); padding: 2rem; border-radius: var(--radius-lg);
  border: 1px solid rgba(0,0,0,0.07);
}
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label {
  font-family: var(--sans); font-size: 0.8rem; font-weight: 600;
  color: var(--ink-soft); letter-spacing: 0.04em;
}
.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--body); font-size: var(--fs-small);
  color: var(--ink); background: var(--bg);
  border: 1.5px solid rgba(0,0,0,0.12);
  border-radius: var(--radius); padding: 0.7rem 1rem;
  width: 100%; transition: border-color var(--transition);
  appearance: none; -webkit-appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none; border-color: var(--navy);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-submit { align-self: flex-start; position: relative; }
.btn-sending { display: none; }
.form-submit.is-sending .btn-text { display: none; }
.form-submit.is-sending .btn-sending { display: block; }
.form-note { font-size: 0.72rem; color: var(--ink-mute); margin-top: 0.25rem; }

/* ══════ FOOTER ══════ */
.site-footer {
  background: var(--ink); color: rgba(245,245,245,0.6);
  padding: 3rem 0 2rem;
}
.footer-layout {
  display: flex; align-items: center; gap: 2rem;
  flex-wrap: wrap; justify-content: space-between;
}
.footer-logo-img { height: 28px; width: auto; object-fit: contain; opacity: 0.7; margin-bottom: 0.5rem; }
.footer-tagline { font-size: 0.72rem; color: rgba(245,245,245,0.35); }
.footer-nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer-nav a { font-size: 0.8125rem; color: rgba(245,245,245,0.5); transition: color var(--transition); }
.footer-nav a:hover { color: var(--white); }
.footer-legal { display: flex; align-items: center; gap: 1.25rem; }
.footer-legal p { font-size: 0.8rem; }
.footer-links { display: flex; gap: 1rem; }
.footer-links a { font-size: 0.8rem; color: rgba(245,245,245,0.4); transition: color var(--transition); }
.footer-links a:hover { color: var(--white); }

/* ══════ WHATSAPP FLOAT ══════ */
.whatsapp-float {
  position: fixed; bottom: 1.75rem; right: 1.75rem; z-index: 800;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25d366; color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,0.40);
  opacity: 0; transform: scale(0.7) translateY(12px);
  pointer-events: none;
  transition: opacity 0.5s var(--transition), transform 0.5s var(--transition),
              box-shadow var(--transition), background var(--transition);
}
.whatsapp-float.is-visible {
  opacity: 1; transform: scale(1) translateY(0);
  pointer-events: auto;
}
.whatsapp-float:hover {
  background: #1ebe5d; box-shadow: 0 8px 28px rgba(37,211,102,0.55);
  transform: scale(1.1) translateY(0) !important;
}

/* ══════ RESPONSIVE ══════ */

/* Tablet 768-1023 */
@media (max-width: 1023px) {
  .nav-links,
  .btn-nav { display: none; }
  .nav-toggle { display: flex; }
  .systems-grid {
    grid-template-columns: repeat(2,1fr);
  }
  .sys-card:nth-child(4) { grid-column: auto; }
  .sys-card:nth-child(5) { grid-column: auto; }
  .research-grid { grid-template-columns: repeat(2,1fr); }
  .engine-layout { grid-template-columns: 1fr; }
  .engine-right { order: -1; }
  .engine-img-wrap { aspect-ratio: 16/9; }
  .about-layout { grid-template-columns: 1fr; }
  .about-visual { max-width: 520px; }
  .contact-layout { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .project-featured { grid-column: auto; }
}

/* Mobile 320-767 */
@media (max-width: 767px) {
  :root { --nav-h: 60px; }
  .nav-logo-img { height: 28px; }
  .section-hero { min-height: 100svh; padding-bottom: 4rem; }
  .hero-scroll-indicator { display: none; }
  .value-grid { grid-template-columns: 1fr; }
  .systems-grid { grid-template-columns: 1fr; }
  .sys-card { min-height: 280px; }
  .sys-desc { opacity: 1; transform: none; }
  .research-grid { grid-template-columns: 1fr; }
  .section-header--split { flex-direction: column; gap: 1rem; }
  .engine-step { grid-template-columns: 2.5rem 1fr; }
  .engine-step-desc { display: none; }
  .about-flow { gap: 0.5rem; }
  .about-visual { max-width: 340px; margin: 0 auto; }
  .footer-layout { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .footer-nav { gap: 1rem; }
}

/* ══════ MICRO-ANIMATIONS ══════ */

/* Staggered delays for lists */
[data-delay="0"]   { transition-delay: 0ms; }
[data-delay="60"]  { transition-delay: 60ms; }
[data-delay="80"]  { transition-delay: 80ms; }
[data-delay="100"] { transition-delay: 100ms; }
[data-delay="120"] { transition-delay: 120ms; }
[data-delay="160"] { transition-delay: 160ms; }
[data-delay="200"] { transition-delay: 200ms; }
[data-delay="240"] { transition-delay: 240ms; }
[data-delay="250"] { transition-delay: 250ms; }
[data-delay="300"] { transition-delay: 300ms; }
[data-delay="320"] { transition-delay: 320ms; }
[data-delay="360"] { transition-delay: 360ms; }
[data-delay="440"] { transition-delay: 440ms; }

/* Hover underline for footer & nav */
.footer-nav a,
.res-link,
.nav-links a {
  position: relative;
}

/* ─── LEGOLAS card ─── */
.legolas-desc {
  display: flex; flex-direction: column; gap: 1rem;
  margin-top: 0.25rem;
}
.legolas-desc p { font-size: 0.95rem; color: rgba(245,245,245,0.72); line-height: 1.75; }
.legolas-callout {
  font-family: var(--sans); font-weight: 700;
  font-size: 1.15rem !important; color: var(--white) !important;
  font-style: italic; letter-spacing: -0.01em;
}
.legolas-proposition {
  margin-top: 0.5rem; padding-top: 1.25rem;
  border-top: 1px solid rgba(245,245,245,0.12);
  display: flex; flex-direction: column; gap: 0.75rem;
}
.legolas-prop-label {
  font-size: 0.72rem !important; text-transform: uppercase;
  letter-spacing: 0.18em; color: rgba(245,245,245,0.40) !important;
}
.legolas-closing {
  font-family: var(--sans); font-weight: 700;
  font-size: 1.05rem !important; color: var(--white) !important;
  line-height: 1.5;
}

/* Featured card layout: image left, copy right; header spans full width */
.project-featured {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 1.25rem 2.75rem;
  align-items: start;
}
.project-featured .project-top,
.project-featured .project-name,
.project-featured .project-label {
  grid-column: 1 / -1;
}
.legolas-image {
  grid-column: 1;
  align-self: start;
  padding: 0.5rem 0;
}
/* legolas.jpg is navy artwork on an off-white ground. invert() flips it to a
   light emblem on near-black; lighten then keeps whichever is brighter per
   pixel — the near-black ground loses to the navy card (vanishes exactly),
   the light emblem wins (stays crisp). No white box. */
.legolas-image img {
  width: 100%; height: auto; display: block;
  filter: invert(1) brightness(1.06) contrast(1.04);
  mix-blend-mode: lighten;
}
.legolas-desc {
  grid-column: 2;
  margin-top: 0;
}

@media (max-width: 767px) {
  .project-featured {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .legolas-image,
  .legolas-desc {
    grid-column: 1;
  }
  .legolas-image { max-width: 260px; }
}