/* ==========================================================================
   MERKEZİ HAVALANDIRMA SİSTEMLERİ — Design System
   Editorial-industrial visual language. Bootstrap is used only as a
   layout/utility substrate; every visible surface is re-themed here.
   ========================================================================== */

/* -----------------------------------------------------------------------
   1. TOKENS
   ----------------------------------------------------------------------- */
:root{
  /* Brand colors — derived from logo (navy fan mark + blue airflow wave) */
  --ink:            #0F2A47;   /* primary navy — logo mark, headings, dark sections */
  --ink-deep:       #0A1D33;   /* deepest navy — full-bleed dark section base   */
  --blue:           #1F6FB2;   /* brand blue — logo wordmark, links, secondary accent */
  --blue-strong:    #175A93;   /* pressed / hover state of brand blue */
  --sky:            #6EC1E8;   /* light accent — logo wave highlight, thin rules */
  --paper:          #F7F9FB;   /* base background — warm-cool off white */
  --paper-alt:      #EEF2F6;   /* alternating section background */
  --white:          #FFFFFF;
  --text:           #12202E;  /* primary body text on light */
  --text-soft:      #4C5C6B;  /* secondary text on light */
  --text-faint:     #7C8896;  /* tertiary / meta text */
  --on-dark:        #F3F6F9;  /* primary text on dark sections */
  --on-dark-soft:   #A9BACB;  /* secondary text on dark sections */
  --line:           #DCE3EA;  /* hairline borders on light */
  --line-dark:      #24405C;  /* hairline borders on dark */
  --verify:         #2E7D5B;  /* verification / trust check accent, used sparingly */

  /* Typography */
  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;

  --h1: clamp(2.6rem, 1.7rem + 4.2vw, 5.6rem);
  --h2: clamp(1.9rem, 1.4rem + 2.2vw, 3rem);
  --h3: clamp(1.25rem, 1.1rem + 0.6vw, 1.5rem);
  --body-lg: clamp(1.05rem, 1rem + 0.2vw, 1.2rem);
  --body: 1rem;
  --small: 0.8125rem;

  /* Spacing scale (px, used via rem below for scalability) */
  --sp-1: 0.25rem;   /* 4  */
  --sp-2: 0.5rem;    /* 8  */
  --sp-3: 1rem;      /* 16 */
  --sp-4: 1.5rem;    /* 24 */
  --sp-5: 2rem;      /* 32 */
  --sp-6: 3rem;      /* 48 */
  --sp-7: 4rem;      /* 64 */
  --sp-8: 6rem;      /* 96 */
  --sp-9: 8rem;      /* 128 */
  --sp-10: 10rem;    /* 160 */

  --section-pad: clamp(4rem, 3rem + 4vw, 9rem);
  --container-max: 1440px;
  --container-pad: clamp(1.5rem, 1rem + 2.5vw, 5rem);

  /* Radius */
  --r-none: 0;
  --r-sm: 4px;
  --r-pill: 999px;

  /* Shadow — used only for floating chrome (sticky header, dropdown) */
  --shadow-sm: 0 8px 24px rgba(10, 25, 40, 0.10);

  /* Motion */
  --ease: cubic-bezier(0.16, 0.6, 0.2, 1);
  --dur-fast: 250ms;
  --dur-mid: 450ms;
  --dur-slow: 700ms;
}

/* -----------------------------------------------------------------------
   2. RESET / BASE
   ----------------------------------------------------------------------- */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--body);
  line-height: 1.6;
  color: var(--text);
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ margin: 0; padding: 0; list-style: none; }
button{ font-family: inherit; }
h1,h2,h3,h4,p{ margin: 0; }
::selection{ background: var(--blue); color: var(--white); }

/* -----------------------------------------------------------------------
   3. TYPOGRAPHY
   ----------------------------------------------------------------------- */
.h1-display{
  font-family: var(--font-display);
  font-size: var(--h1);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.h1-display.on-dark{ color: var(--white); }

.h2-section{
  font-family: var(--font-display);
  font-size: var(--h2);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.h2-section.on-dark{ color: var(--white); }

.h3-card{
  font-family: var(--font-display);
  font-size: var(--h3);
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
}
.h3-card.on-dark{ color: var(--white); }

.body-lg{ font-size: var(--body-lg); line-height: 1.65; color: var(--text-soft); }
.body-lg.on-dark{ color: var(--on-dark-soft); }

.eyebrow{
  font-family: var(--font-mono);
  font-size: var(--small);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}
.eyebrow.on-dark{ color: var(--sky); }
.eyebrow::before{
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  display: inline-block;
}

.text-faint{ color: var(--text-faint); }
.text-on-dark-soft{ color: var(--on-dark-soft); }

/* -----------------------------------------------------------------------
   4. LAYOUT
   ----------------------------------------------------------------------- */
.container-custom{
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section{ padding-block: var(--section-pad); position: relative; }
.section-tight{ padding-block: calc(var(--section-pad) * 0.55); }
.section.on-dark{ background: var(--ink-deep); }
.section.on-alt{ background: var(--paper-alt); }

.split{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: center;
}
.split--7-5{ grid-template-columns: 7fr 5fr; }
.split--5-7{ grid-template-columns: 5fr 7fr; }
.split--8-4{ grid-template-columns: 8fr 4fr; }
.split--4-8{ grid-template-columns: 4fr 8fr; }

.grid-12{
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--sp-6);
}

.stack{ display: flex; flex-direction: column; }
.gap-2{ gap: var(--sp-2); }
.gap-3{ gap: var(--sp-3); }
.gap-4{ gap: var(--sp-4); }
.gap-5{ gap: var(--sp-5); }
.gap-6{ gap: var(--sp-6); }

.divider-line{ height: 1px; background: var(--line); border: 0; margin: 0; }
.divider-line.on-dark{ background: var(--line-dark); }

/* -----------------------------------------------------------------------
   5. HEADER / NAVIGATION
   ----------------------------------------------------------------------- */
.site-header{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding-block: var(--sp-4);
  background: transparent;
  transition: background var(--dur-mid) var(--ease), padding var(--dur-mid) var(--ease), box-shadow var(--dur-mid) var(--ease);
}
.site-header.is-scrolled{
  background: rgba(247, 249, 251, 0.92);
  backdrop-filter: blur(10px);
  padding-block: var(--sp-3);
  box-shadow: var(--shadow-sm);
}
.site-header .nav-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand{
  display: flex;
  align-items: center;
  gap: 0;
  line-height: 0;
}
.brand img{
  height: 56px;
  width: auto;
  max-width: min(300px, 52vw);
  display: block;
  object-fit: contain;
}
/* logo-light = white full logo for dark header; logo-dark = navy full logo for scrolled/light header */
.brand .logo-dark{ display: none; }
.site-header.is-scrolled .brand .logo-light{ display: none; }
.site-header.is-scrolled .brand .logo-dark{ display: block; }

.main-nav{ display: flex; align-items: center; gap: var(--sp-6); }
.main-nav ul{ display: flex; align-items: center; gap: var(--sp-5); }
.nav-link{
  position: relative;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink);
  padding-block: var(--sp-1);
}
.site-header:not(.is-scrolled) .nav-link{ color: var(--white); }
.nav-link::after{
  content: "";
  position: absolute;
  left: 0; bottom: -3px;
  width: 0%; height: 1px;
  background: currentColor;
  transition: width var(--dur-fast) var(--ease);
}
.nav-link:hover::after,
.nav-link.is-active::after{ width: 100%; }

.nav-dropdown{ position: relative; }
.nav-dropdown-panel{
  position: absolute;
  top: calc(100% + 18px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 320px;
  background: var(--white);
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-sm);
  padding: var(--sp-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), visibility var(--dur-fast);
}
.nav-dropdown:hover .nav-dropdown-panel,
.nav-dropdown:focus-within .nav-dropdown-panel{
  opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
.nav-dropdown-panel a{
  display: block;
  padding: var(--sp-2) var(--sp-2);
  font-size: 0.88rem;
  color: var(--text);
  border-radius: var(--r-sm);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.nav-dropdown-panel a:hover{ background: var(--paper-alt); color: var(--blue); }

.nav-cta{ display: none; }
@media (min-width: 1024px){ .nav-cta{ display: inline-flex; } }

.nav-toggle{
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px; height: 32px;
  background: none;
  border: 0;
  cursor: pointer;
}
.nav-toggle span{
  width: 100%; height: 1.5px;
  background: var(--ink);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.site-header:not(.is-scrolled) .nav-toggle span{ background: var(--white); }
.nav-toggle.is-open span:nth-child(1){ transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity: 0; }
.nav-toggle.is-open span:nth-child(3){ transform: translateY(-6.5px) rotate(-45deg); }

.mobile-nav{
  position: fixed;
  inset: 0;
  background: var(--ink-deep);
  z-index: 999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--sp-7) var(--container-pad);
  transform: translateY(-100%);
  transition: transform var(--dur-mid) var(--ease);
}
.mobile-nav.is-open{ transform: translateY(0); }
.mobile-nav ul{ display: flex; flex-direction: column; gap: var(--sp-4); }
.mobile-nav a{
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 6vw, 2.4rem);
  font-weight: 600;
  color: var(--white);
}
.mobile-nav .sub-links{ display: flex; flex-direction: column; gap: var(--sp-2); margin-top: var(--sp-2); padding-left: var(--sp-4); }
.mobile-nav .sub-links a{ font-size: 1rem; font-family: var(--font-body); font-weight: 400; color: var(--on-dark-soft); }
.mobile-nav .mobile-meta{ margin-top: var(--sp-7); }

/* -----------------------------------------------------------------------
   6. BUTTONS
   ----------------------------------------------------------------------- */
.btn-primary{
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.95rem 2rem;
  border-radius: var(--r-pill);
  background: var(--ink);
  color: var(--white);
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid var(--ink);
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.btn-primary:hover{ background: var(--blue); border-color: var(--blue); transform: translateY(-2px); }
.btn-primary.on-dark{ background: var(--white); color: var(--ink); border-color: var(--white); }
.btn-primary.on-dark:hover{ background: var(--sky); border-color: var(--sky); color: var(--ink-deep); }

.btn-secondary{
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.9rem 1.9rem;
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid var(--ink);
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.btn-secondary:hover{ border-color: var(--blue); color: var(--blue); background: rgba(31,111,178,0.06); }
.btn-secondary.on-dark{ color: var(--white); border-color: rgba(255,255,255,0.5); }
.btn-secondary.on-dark:hover{ border-color: var(--sky); color: var(--sky); background: rgba(255,255,255,0.06); }

.btn-link{
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
  position: relative;
  padding-bottom: 2px;
}
.btn-link.on-dark{ color: var(--white); }
.btn-link i{ transition: transform var(--dur-fast) var(--ease); }
.btn-link::after{
  content: "";
  position: absolute;
  left: 0; bottom: -1px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease);
}
.btn-link:hover::after{ transform: scaleX(1); }
.btn-link:hover i{ transform: translateX(4px); }

/* -----------------------------------------------------------------------
   7. FORMS
   ----------------------------------------------------------------------- */
.field{ margin-bottom: var(--sp-5); }
.field label{
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: var(--sp-2);
}
.field input,
.field textarea,
.field select{
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  padding: 0.7rem 0.1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text);
  border-radius: 0;
  transition: border-color var(--dur-fast) var(--ease);
}
.field select{ appearance: none; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8'><path d='M1 1l5 5 5-5' stroke='%237C8896' stroke-width='1.4' fill='none'/></svg>"); background-repeat: no-repeat; background-position: right 0.2rem center; }
.field input:focus,
.field textarea:focus,
.field select:focus{ outline: none; border-bottom: 2px solid var(--blue); }
.field textarea{ resize: vertical; min-height: 120px; }
.field input::placeholder,
.field textarea::placeholder{ color: var(--text-faint); }

/* -----------------------------------------------------------------------
   8. FOOTER
   ----------------------------------------------------------------------- */
.site-footer{
  background: var(--ink-deep);
  color: var(--on-dark-soft);
  padding-top: var(--sp-9);
}
.footer-top{
  display: grid;
  grid-template-columns: 5fr 2fr 2fr 3fr;
  gap: var(--sp-7);
  padding-bottom: var(--sp-8);
  border-bottom: 1px solid var(--line-dark);
}
.footer-brand img{ height: 58px; width: auto; max-width: 320px; margin-bottom: var(--sp-4); display: block; object-fit: contain; }
.footer-brand p{ max-width: 340px; color: var(--on-dark-soft); font-size: 0.92rem; line-height: 1.7; }
.footer-col h4{
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sky);
  margin-bottom: var(--sp-4);
}
.footer-col ul{ display: flex; flex-direction: column; gap: var(--sp-3); }
.footer-col a{ color: var(--on-dark-soft); font-size: 0.92rem; transition: color var(--dur-fast) var(--ease); }
.footer-col a:hover{ color: var(--white); }
.footer-col .contact-line{ display: flex; gap: var(--sp-2); align-items: baseline; }
.footer-bottom{
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: var(--sp-5);
  font-size: 0.8rem;
  color: var(--text-faint);
}
.footer-social{ display: flex; gap: var(--sp-3); }
.footer-social a{
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--line-dark);
  border-radius: var(--r-pill);
  color: var(--on-dark-soft);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.footer-social a:hover{ border-color: var(--sky); color: var(--sky); }

/* -----------------------------------------------------------------------
   9. CARDS & EDITORIAL COMPONENTS
   ----------------------------------------------------------------------- */
.index-num{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--blue);
  letter-spacing: 0.05em;
}

.media-frame{
  position: relative;
  overflow: hidden;
  background: var(--ink);
}
.media-frame img{
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--dur-slow) var(--ease);
}
.media-frame:hover img{ transform: scale(1.045); }
.media-frame .frame-overlay{
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,25,40,0) 40%, rgba(10,25,40,0.72) 100%);
}
.media-frame .frame-caption{
  position: absolute; left: var(--sp-4); bottom: var(--sp-4); right: var(--sp-4);
  color: var(--white);
}

.editorial-card{
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--line);
  transition: border-color var(--dur-fast) var(--ease);
}
.editorial-card:hover{ border-color: var(--blue); }
.editorial-card .card-link{ display: inline-flex; align-items: center; gap: var(--sp-2); font-weight: 600; font-size: 0.88rem; color: var(--ink); }
.editorial-card .card-link i{ transition: transform var(--dur-fast) var(--ease); }
.editorial-card:hover .card-link i{ transform: translateX(4px); }
.editorial-card:hover .card-link{ color: var(--blue); }

.pill-tag{
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-soft);
  transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.pill-tag.on-dark{ border-color: var(--line-dark); color: var(--on-dark-soft); }
a.pill-tag:hover{ border-color: var(--blue); color: var(--blue); }

/* -----------------------------------------------------------------------
   10. SHARED SECTION PATTERNS
   ----------------------------------------------------------------------- */

/* Stat strip */
.stat-strip{ display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-6); }
.stat-block .stat-value{ font-family: var(--font-display); font-size: clamp(2rem, 1.5rem + 2vw, 3.2rem); font-weight: 600; color: var(--white); line-height: 1; }
.stat-block .stat-label{ margin-top: var(--sp-2); font-size: 0.95rem; color: var(--on-dark-soft); }

/* Process timeline */
.timeline{ position: relative; display: flex; flex-direction: column; gap: var(--sp-7); }
.timeline::before{
  content: "";
  position: absolute; top: 0; bottom: 0; left: 28px;
  width: 1px; background: var(--line);
}
.timeline-item{ position: relative; display: grid; grid-template-columns: 72px 1fr; gap: var(--sp-5); }
.timeline-num{
  width: 56px; height: 56px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--paper);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 0.9rem; color: var(--blue);
  position: relative; z-index: 1;
}
.timeline-item.is-active .timeline-num{ background: var(--ink); border-color: var(--ink); color: var(--white); }

/* Capability steps (homepage) */
.cap-step{ display: grid; grid-template-columns: 90px 1fr; gap: var(--sp-5); padding-block: var(--sp-5); border-top: 1px solid var(--line); }
.cap-step:first-child{ border-top: 1px solid var(--line); }
.cap-step .cap-index{ font-family: var(--font-mono); font-size: 1.1rem; color: var(--blue); }

/* Trust grid (dark) */
.trust-grid{ display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-6); }
.trust-item{ border-top: 1px solid var(--line-dark); padding-top: var(--sp-4); }
.trust-item i{ font-size: 1.4rem; color: var(--sky); margin-bottom: var(--sp-3); display: block; }
.trust-item h4{ color: var(--white); font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; margin-bottom: var(--sp-2); }
.trust-item p{ color: var(--on-dark-soft); font-size: 0.92rem; line-height: 1.6; }

/* CTA banner */
.cta-banner{ background: var(--ink-deep); text-align: center; }
.cta-banner .contact-meta{ display: flex; justify-content: center; gap: var(--sp-6); margin-top: var(--sp-6); flex-wrap: wrap; }
.cta-banner .contact-meta a{ color: var(--on-dark-soft); font-size: 0.95rem; display: inline-flex; align-items: center; gap: var(--sp-2); transition: color var(--dur-fast) var(--ease); }
.cta-banner .contact-meta a:hover{ color: var(--sky); }

/* Solutions cluster grid — asymmetric: 1 lead (large square) + 2 regular + 1 wide */
.solutions-grid{ display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: repeat(2, 1fr); gap: var(--sp-4); min-height: 680px; }
.solutions-grid .cluster{
  position: relative;
  overflow: hidden;
  border-radius: var(--r-sm);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--sp-6);
  color: var(--white);
  background: var(--ink);
}
.solutions-grid .cluster.is-lead{ grid-column: span 2; grid-row: span 2; }
.solutions-grid .cluster.is-wide{ grid-column: span 2; }
.solutions-grid .cluster img{ position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; transition: transform var(--dur-slow) var(--ease); }
.solutions-grid .cluster:hover img{ transform: scale(1.05); }
.solutions-grid .cluster::before{ content:""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,25,40,0.15) 0%, rgba(10,25,40,0.88) 100%); z-index: 1; }
.solutions-grid .cluster > *{ position: relative; z-index: 2; }
.solutions-grid .cluster .cluster-count{ font-family: var(--font-mono); font-size: 0.78rem; color: var(--sky); margin-bottom: var(--sp-2); }

/* Industries horizontal scroller (Swiper mounts here) */
.industries-swiper{ overflow: visible !important; }
.industry-slide{ position: relative; height: 560px; border-radius: var(--r-sm); overflow: hidden; }
.industry-slide img{ position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-slow) var(--ease); }
.industry-slide:hover img{ transform: scale(1.05); }
.industry-slide::after{ content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,25,40,0) 45%, rgba(10,25,40,0.85) 100%); }
.industry-slide .industry-label{ position: absolute; left: var(--sp-4); right: var(--sp-4); bottom: var(--sp-4); z-index: 2; color: var(--white); }
.industry-slide .industry-label small{ font-family: var(--font-mono); color: var(--sky); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; }

/* Impact diagram lines (SVG based, no photography) */
.impact-diagram{ width: 100%; height: auto; color: var(--blue); }
.impact-diagram .line-anim{ stroke-dasharray: 6 6; }

/* Projects masonry-lite */
.projects-grid{ display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
.projects-grid .proj-lead{ grid-column: span 2; grid-row: span 2; }
.projects-grid .media-frame{ aspect-ratio: 1/1; border-radius: var(--r-sm); }
.projects-grid .proj-lead .media-frame{ aspect-ratio: 16/11; }

/* Hero */
.hero{ position: relative; min-height: 100vh; display: flex; align-items: center; background: var(--ink-deep); overflow: hidden; }
.hero .hero-media{ position: absolute; inset: 0; z-index: 0; }
.hero .hero-media img{ width: 100%; height: 100%; object-fit: cover; opacity: 0.55; }
.hero .hero-media::after{ content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, rgba(10,25,40,0.92) 0%, rgba(10,25,40,0.55) 55%, rgba(10,25,40,0.25) 100%); }
.hero .hero-content{ position: relative; z-index: 1; padding-top: var(--sp-9); }
.hero .scroll-hint{ position: absolute; left: var(--container-pad); bottom: var(--sp-6); z-index: 1; display: flex; align-items: center; gap: var(--sp-2); color: var(--on-dark-soft); font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; }
.hero .scroll-hint .hint-line{ width: 1px; height: 32px; background: var(--on-dark-soft); position: relative; overflow: hidden; }
.hero .scroll-hint .hint-line::after{ content:""; position: absolute; top: -100%; left: 0; width: 100%; height: 100%; background: var(--sky); animation: hint-fall 2.4s var(--ease) infinite; }
@keyframes hint-fall{ 0%{ top: -100%; } 60%{ top: 100%; } 100%{ top: 100%; } }

/* Page hero (inner pages, shorter) */
.page-hero{ position: relative; padding-top: calc(var(--sp-9) + var(--sp-4)); padding-bottom: var(--sp-7); background: var(--ink-deep); overflow: hidden; }
.page-hero .hero-media{ position: absolute; inset: 0; z-index: 0; }
.page-hero .hero-media img{ width: 100%; height: 100%; object-fit: cover; opacity: 0.35; }
.page-hero .hero-media::after{ content:""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,25,40,0.4) 0%, rgba(10,25,40,0.96) 100%); }
.page-hero .hero-content{ position: relative; z-index: 1; }

/* Breadcrumb */
.breadcrumb-line{ display: flex; align-items: center; gap: var(--sp-2); font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--on-dark-soft); margin-bottom: var(--sp-4); }
.breadcrumb-line a{ color: var(--on-dark-soft); transition: color var(--dur-fast) var(--ease); }
.breadcrumb-line a:hover{ color: var(--sky); }

/* Service list rows (category pages) */
.service-row{ display: grid; grid-template-columns: 90px 1fr 140px; gap: var(--sp-5); align-items: center; padding-block: var(--sp-5); border-top: 1px solid var(--line); transition: background var(--dur-fast) var(--ease); }
.service-row:hover{ background: var(--paper-alt); }
.service-row .row-num{ font-family: var(--font-mono); color: var(--blue); font-size: 0.9rem; }
.service-row .row-arrow{ justify-self: end; font-size: 1.2rem; color: var(--text-faint); transition: transform var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease); }
.service-row:hover .row-arrow{ transform: translateX(4px); color: var(--blue); }

/* Cluster nav pills (services hub → subpages quick nav) */
.cluster-pills{ display: flex; gap: var(--sp-3); flex-wrap: wrap; }

/* Contact split */
.contact-info-card{ background: var(--ink); color: var(--white); border-radius: var(--r-sm); padding: var(--sp-6); }
.contact-info-card .contact-line{ display: flex; align-items: flex-start; gap: var(--sp-3); padding-block: var(--sp-4); border-top: 1px solid var(--line-dark); }
.contact-info-card .contact-line:first-of-type{ border-top: 0; }
.contact-info-card i{ color: var(--sky); font-size: 1.1rem; margin-top: 3px; }

.map-strip{ position: relative; height: 420px; background: var(--paper-alt); overflow: hidden; }
.map-strip iframe{ width: 100%; height: 100%; border: 0; filter: grayscale(0.3) contrast(1.05); }

/* -----------------------------------------------------------------------
   11. PAGE TEMPLATE PRIMITIVES
   ----------------------------------------------------------------------- */

/* Capability / timeline step thumbnails */
.cap-step{ grid-template-columns: 64px 1fr 112px; align-items: center; }
.cap-step .cap-thumb{ width: 112px; height: 84px; overflow: hidden; background: var(--ink); }
.cap-step .cap-thumb img{ width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-slow) var(--ease); }
.cap-step:hover .cap-thumb img{ transform: scale(1.06); }
.cap-step .cap-body{ display: flex; flex-direction: column; gap: var(--sp-2); }

.timeline-item .timeline-body{ display: grid; grid-template-columns: 1fr 128px; gap: var(--sp-5); align-items: start; }
.timeline-item .timeline-thumb{ width: 128px; height: 96px; overflow: hidden; background: var(--ink); }
.timeline-item .timeline-thumb img{ width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-slow) var(--ease); }
.timeline-item:hover .timeline-thumb img{ transform: scale(1.06); }

/* Five-up mini step strip (About — process summary) */
.mini-steps{ display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--sp-4); }
.mini-step{ padding-top: var(--sp-4); border-top: 1px solid var(--line); }

/* About — approach columns */
.approach-col{ display: flex; flex-direction: column; gap: var(--sp-3); padding-top: var(--sp-5); border-top: 1px solid var(--line); }
.approach-col .approach-index{ font-family: var(--font-mono); font-size: 1.4rem; color: var(--blue); }

/* Generic two/three column text block */
.text-cols-2{ display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-7); }

/* Sector pill nav (services hub cross-reference) */
.sector-pill-row{ display: flex; flex-wrap: wrap; gap: var(--sp-3); padding-block: var(--sp-6); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* Category service detail list (service subpages) */
.service-detail-item{ display: grid; grid-template-columns: 64px 1fr; gap: var(--sp-5); padding-block: var(--sp-5); border-top: 1px solid var(--line); }
.service-detail-item:first-child{ border-top: 1px solid var(--line); }
.service-detail-item .sd-index{ font-family: var(--font-mono); color: var(--blue); font-size: 1rem; }
.service-detail-item h4{ font-family: var(--font-display); font-weight: 600; font-size: 1.1rem; color: var(--ink); margin-bottom: var(--sp-2); }
.service-detail-item p{ color: var(--text-soft); font-size: 0.95rem; line-height: 1.65; margin: 0; }

/* Filter tabs (projects page) */
.filter-row{ display: flex; gap: var(--sp-3); flex-wrap: wrap; }
.filter-btn{ padding: 0.5rem 1.1rem; border: 1px solid var(--line); border-radius: var(--r-pill); font-size: 0.85rem; font-weight: 500; color: var(--text-soft); background: transparent; cursor: pointer; transition: all var(--dur-fast) var(--ease); }
.filter-btn:hover{ border-color: var(--blue); color: var(--blue); }
.filter-btn.is-active{ background: var(--ink); border-color: var(--ink); color: var(--white); }

/* Low-contrast metal texture backdrop for Trust-style dark sections (no photography) */
.texture-lines{ position: absolute; inset: 0; opacity: 0.06; pointer-events: none;
  background-image: repeating-linear-gradient(115deg, var(--sky) 0px, var(--sky) 1px, transparent 1px, transparent 64px);
}

/* Back-to-top / breadcrumb spacing helper for inner pages */
.page-hero .eyebrow{ margin-bottom: var(--sp-4); }

/* Accordion (services hub — cluster full service list) */
.accordion-trigger{
  display: inline-flex; align-items: center; gap: var(--sp-2);
  background: none; border: 0; padding: 0;
  font-size: 0.88rem; font-weight: 600; color: var(--ink);
  cursor: pointer;
}
.accordion-trigger i{ transition: transform var(--dur-fast) var(--ease); }
.accordion-trigger.is-open i{ transform: rotate(180deg); }
.accordion-panel{ max-height: 0; overflow: hidden; transition: max-height var(--dur-mid) var(--ease); }
.accordion-panel ul{ padding-top: var(--sp-3); display: flex; flex-direction: column; gap: var(--sp-2); }
.accordion-panel li{ font-size: 0.9rem; color: var(--text-soft); padding-left: var(--sp-3); position: relative; }
.accordion-panel li::before{ content: "—"; position: absolute; left: 0; color: var(--blue); }

/* AOS baseline overrides for premium slow easing */
[data-aos]{ transition-duration: 750ms !important; transition-timing-function: var(--ease) !important; }

/* Utility */
.mt-0{ margin-top: 0 !important; }
.text-center{ text-align: center; }
.mx-auto{ margin-inline: auto; }
.max-w-content{ max-width: 640px; }
.max-w-content.mx-auto{ margin-inline: auto; }
.no-scrollbar::-webkit-scrollbar{ display: none; }

/* -----------------------------------------------------------------------
   12. WHATSAPP FLOATING BUTTON
   ----------------------------------------------------------------------- */
.whatsapp-float{
  position: fixed;
  left: var(--sp-5);
  bottom: var(--sp-5);
  z-index: 998;
  width: 58px; height: 58px;
  border-radius: var(--r-pill);
  background: #25D366;
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  line-height: 1;
  box-shadow: 0 12px 28px rgba(15, 42, 71, 0.28);
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.whatsapp-float:hover,
.whatsapp-float:focus-visible{
  color: var(--white);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 16px 34px rgba(15, 42, 71, 0.36);
}
.whatsapp-float i{ pointer-events: none; }