/* =========================================================
   GRUPO KAIRÓS — LANDING PAGE
   Paleta oficial (Manual de Identidad Gráfica)
   Pantone 282 C  -> #132343 (azul marino profundo)
   Pantone 7683 C -> #4f6ca7 (azul kairós)
   Pantone 656 C  -> #dbe3ec (azul hielo claro)
   Cool Gray C    -> #d5d6d4 (gris neutro)
   ========================================================= */

:root{
  --kairos-navy: #132343;
  --kairos-navy-80: #364a68;
  --kairos-navy-60: #5f7089;
  --kairos-blue: #4f6ca7;
  --kairos-blue-80: #6f89bb;
  --kairos-blue-60: #90a5cc;
  --kairos-ice: #dbe3ec;
  --kairos-ice-60: #ecf0f5;
  --kairos-gray: #d5d6d4;
  --kairos-gray-light: #f2f3f2;
  --white: #ffffff;
  --text-dark: #1b1f2a;
  --text-muted: #5a6478;
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  font-family: var(--font-body);
  color: var(--text-dark);
  overflow-x: hidden;
  background: var(--white);
}

h1, h2, h3, h4, h5, h6{
  font-family: var(--font-heading);
}

img{ max-width: 100%; }

/* ============ PRELOADER ============ */
#preloader{
  position: fixed;
  inset: 0;
  background: var(--white);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .5s ease, visibility .5s ease;
}
#preloader.hide{
  opacity: 0;
  visibility: hidden;
}
.loader-emblem img{
  display: block;
  width: 70px;
  height: 70px;
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse{
  0%, 100%{ transform: scale(1); opacity: 1; }
  50%{ transform: scale(1.12); opacity: .6; }
}

/* ============ NAVBAR ============ */
#mainNav{
  padding: 18px 0;
  transition: all .35s ease;
  background: transparent;
}
#mainNav.scrolled{
  background: rgba(255,255,255,0.97);
  box-shadow: 0 4px 24px rgba(19,35,67,0.08);
  padding: 10px 0;
  backdrop-filter: blur(8px);
}
.logo-navbar{
  height: 44px;
  transition: height .35s ease;
}
#mainNav.scrolled .logo-navbar{ height: 38px; }

/* Logos oficiales del manual de identidad (PNG con transparencia) */
.logo-lockup{
  position: relative;
  display: block;
  width: 123px;
  height: 27px;
  line-height: 0;
}
.logo-light{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: left center;
  opacity: 1;
  transition: opacity .3s ease;
}
.logo-dark{
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  gap: 8.3px;
  opacity: 0;
  transition: opacity .3s ease;
}
#mainNav.scrolled .logo-light{ opacity: 0; }
#mainNav.scrolled .logo-dark{ opacity: 1; }
.logo-dark-emblem{
  height: 27px;
  width: auto;
  flex-shrink: 0;
}
.logo-dark-wordmark{
  height: 15.7px;
  width: auto;
  flex-shrink: 0;
}

.footer-logo{
  display: inline-flex;
  align-items: center;
  margin-bottom: 18px;
}
.footer-logo-horizontal{
  height: 34px;
  width: auto;
}

.navbar-nav .nav-link{
  color: var(--white);
  font-weight: 500;
  font-size: 0.94rem;
  padding: 8px 14px !important;
  transition: color .3s ease;
  position: relative;
}
#mainNav.scrolled .navbar-nav .nav-link{
  color: var(--kairos-navy);
}
.navbar-nav .nav-link:hover{
  color: var(--kairos-blue-60);
}
#mainNav.scrolled .navbar-nav .nav-link:hover{
  color: var(--kairos-blue);
}
.navbar-toggler{
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: 6px;
  box-shadow: none !important;
  padding: 8px 11px;
  line-height: 0;
}
.navbar-toggler .navbar-toggler-icon{
  width: 1.4em;
  height: 1.4em;
}
#mainNav.scrolled .navbar-toggler{
  border-color: rgba(19,35,67,0.35);
}
#mainNav .navbar-toggler-icon{
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba(255,255,255,1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}
#mainNav.scrolled .navbar-toggler-icon{
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba(19,35,67,1)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}

/* Buttons */
.btn-kairos-primary{
  background: var(--kairos-blue);
  border: 2px solid var(--kairos-blue);
  color: var(--white);
  font-weight: 600;
  padding: 12px 32px;
  border-radius: 6px;
  transition: all .3s ease;
}
.btn-kairos-primary:hover{
  background: var(--kairos-navy);
  border-color: var(--kairos-navy);
  color: var(--white);
  transform: translateY(-2px);
}
.btn-kairos-outline{
  border: 2px solid var(--white);
  color: var(--white) !important;
  font-weight: 600;
  padding: 8px 22px;
  border-radius: 6px;
  transition: all .3s ease;
  font-size: 0.9rem;
}
#mainNav.scrolled .btn-kairos-outline{
  border-color: var(--kairos-blue);
  color: var(--kairos-blue) !important;
}
.btn-kairos-outline:hover{
  background: var(--white);
  color: var(--kairos-navy) !important;
}
#mainNav.scrolled .btn-kairos-outline:hover{
  background: var(--kairos-blue);
  color: var(--white) !important;
}
.btn-kairos-ghost{
  border: 2px solid rgba(255,255,255,0.55);
  color: var(--white);
  font-weight: 600;
  padding: 12px 32px;
  border-radius: 6px;
  transition: all .3s ease;
}
.btn-kairos-ghost:hover{
  background: rgba(255,255,255,0.12);
  border-color: var(--white);
  color: var(--white);
}

/* ============ HERO ============ */
.hero-section{
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--kairos-navy) 0%, #1c3560 55%, var(--kairos-blue) 100%);
  overflow: hidden;
}
.hero-overlay{
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(79,108,167,0.35) 0%, transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(219,227,236,0.15) 0%, transparent 50%);
}
.hero-particles{
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-particles span{
  position: absolute;
  display: block;
  border-radius: 50%;
  background: rgba(219,227,236,0.25);
  animation: floatUp linear infinite;
}
@keyframes floatUp{
  0%{ transform: translateY(0) translateX(0); opacity: 0; }
  10%{ opacity: 1; }
  90%{ opacity: 1; }
  100%{ transform: translateY(-120vh) translateX(20px); opacity: 0; }
}
.hero-content{
  position: relative;
  z-index: 2;
  padding-top: 90px;
}
.hero-tag{
  display: inline-block;
  color: var(--kairos-ice);
  letter-spacing: 2px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(219,227,236,0.4);
  padding: 8px 20px;
  border-radius: 30px;
}
.hero-title{
  color: var(--white);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.15;
  margin-bottom: 24px;
}
.hero-title-accent{
  color: var(--kairos-ice);
  font-weight: 300;
}
.hero-subtitle{
  color: rgba(255,255,255,0.85);
  font-size: 1.15rem;
  max-width: 720px;
  margin: 0 auto 40px;
  line-height: 1.7;
}
.hero-cta{
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}
.scroll-down{
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.75);
  font-size: 1.3rem;
  z-index: 2;
  animation: bounce 2s infinite;
}
@keyframes bounce{
  0%, 100%{ transform: translate(-50%, 0); }
  50%{ transform: translate(-50%, 10px); }
}

/* ============ GENERIC SECTIONS ============ */
.section-padding{ padding: 100px 0; }
.bg-white{ background: var(--white); }
.bg-light-blue{ background: linear-gradient(180deg, var(--kairos-ice-60) 0%, var(--white) 100%); }

.section-label{
  display: inline-block;
  color: var(--kairos-blue);
  font-weight: 700;
  letter-spacing: 2px;
  font-size: 0.82rem;
  text-transform: uppercase;
  margin-bottom: 14px;
  position: relative;
  padding-left: 28px;
}
.section-label::before{
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 3px;
  background: var(--kairos-blue);
}
.section-label-light{ color: var(--kairos-ice); }
.section-label-light::before{ background: var(--kairos-ice); }

.section-title{
  font-weight: 700;
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  color: var(--kairos-navy);
  margin-bottom: 22px;
  line-height: 1.25;
}
.text-accent{ color: var(--kairos-blue); }

.lead-text{
  font-size: 1.12rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.7;
}
.body-text{
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 18px;
}

.quote-box{
  background: var(--kairos-ice-60);
  border-left: 4px solid var(--kairos-blue);
  padding: 26px 28px;
  border-radius: 6px;
  position: relative;
}
.quote-box p{
  margin: 0;
  font-style: italic;
  color: var(--kairos-navy);
  font-size: 1.02rem;
  line-height: 1.7;
}
.quote-icon{
  color: var(--kairos-blue-60);
  font-size: 1.4rem;
  margin-bottom: 8px;
  display: block;
}
.quote-box-center{
  text-align: center;
  border-left: none;
  border-top: 4px solid var(--kairos-blue);
}

/* ============ STATS GRID ============ */
.stats-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.stat-card{
  background: linear-gradient(145deg, var(--kairos-navy) 0%, var(--kairos-blue) 100%);
  border-radius: 14px;
  padding: 34px 24px;
  text-align: center;
  color: var(--white);
  box-shadow: 0 12px 30px rgba(19,35,67,0.18);
  position: relative;
  overflow: hidden;
}
.stat-card::after{
  content: '';
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
}
.stat-number{
  font-size: 2.6rem;
  font-weight: 700;
  display: inline-block;
  font-family: var(--font-heading);
}
.stat-suffix{
  font-size: 1.8rem;
  font-weight: 700;
  display: inline-block;
}
.stat-label{
  font-size: 0.92rem;
  color: var(--kairos-ice);
  margin-top: 6px;
}

/* ============ CAPABILITIES ============ */
.capabilities-section{
  background: var(--kairos-navy);
  padding: 90px 0;
  text-align: center;
}
.capabilities-title{
  color: var(--white);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  line-height: 1.4;
  margin-bottom: 22px;
}
.capabilities-title span{ color: var(--kairos-blue-60); }
.capabilities-text{
  color: rgba(255,255,255,0.8);
  font-size: 1.08rem;
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ============ TIMELINE ============ */
.timeline{
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline::before{
  content: '';
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--kairos-blue-60);
}
.timeline-item{
  position: relative;
  padding-bottom: 44px;
}
.timeline-item:last-child{ padding-bottom: 0; }
.timeline-marker{
  position: absolute;
  left: -40px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--white);
  border: 4px solid var(--kairos-blue);
}
.timeline-year{
  color: var(--kairos-blue);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 6px;
  font-family: var(--font-heading);
}
.timeline-content h4{
  color: var(--kairos-navy);
  font-weight: 600;
  font-size: 1.25rem;
  margin-bottom: 10px;
}
.timeline-content p{
  color: var(--text-muted);
  line-height: 1.75;
  margin: 0;
}

/* ============ SECTOR CARDS ============ */
.sector-card{
  background: var(--white);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(19,35,67,0.08);
  height: 100%;
  transition: transform .35s ease, box-shadow .35s ease;
}
.sector-card:hover{
  transform: translateY(-8px);
  box-shadow: 0 18px 36px rgba(19,35,67,0.16);
}
.sector-img{
  height: 160px;
  background-size: cover;
  background-position: center;
  position: relative;
}
.sector-img::after{
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(19,35,67,0) 40%, rgba(19,35,67,0.55) 100%);
}
.sector-body{
  padding: 22px;
  text-align: center;
}
.sector-icon{
  color: var(--kairos-blue);
  font-size: 1.6rem;
  margin-bottom: 10px;
}
.sector-body h5{
  color: var(--kairos-navy);
  font-weight: 600;
  margin-bottom: 8px;
}
.sector-body p{
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 0;
  line-height: 1.6;
}
.sector-link{
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 8px;
  color: var(--kairos-navy);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.sector-link:hover{ color: var(--kairos-blue); }
.sector-link:focus-visible{
  outline: 2px solid var(--kairos-navy);
  outline-offset: 3px;
}

/* ============ HOSPITALIDAD / TURISMO NÁUTICO ============ */
section[id]{ scroll-margin-top: 90px; }

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

.property-card{
  display: flex;
  flex-direction: column;
}
.property-card .sector-body{
  display: flex;
  flex-direction: column;
  flex: 1;
}
.property-location{
  display: block;
  color: var(--kairos-blue);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.property-body .property-meta{
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.property-body .sector-link{
  margin-top: auto;
  padding-top: 12px;
  align-self: center;
}

#hospitalidad .section-title .text-accent,
#turismo-nautico .section-title .text-accent,
#movilidad .section-title .text-accent{ white-space: nowrap; }

/* ============ PURPOSE / PROMESA ============ */
.purpose-section{
  position: relative;
  background: linear-gradient(135deg, var(--kairos-blue) 0%, var(--kairos-navy) 100%);
  padding: 100px 0;
  overflow: hidden;
}
.purpose-overlay{
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(219,227,236,0.18) 0%, transparent 50%);
}
.purpose-section .container{ position: relative; z-index: 2; }
.purpose-title{
  color: var(--white);
  font-weight: 700;
  font-size: clamp(1.9rem, 3.6vw, 2.8rem);
  line-height: 1.35;
  margin-bottom: 22px;
}
.purpose-title-sm{
  color: var(--white);
  font-weight: 600;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  line-height: 1.5;
}
.purpose-text{
  color: rgba(255,255,255,0.85);
  font-size: 1.1rem;
  max-width: 720px;
  margin: 0 auto;
  line-height: 1.8;
}
.process-step{
  text-align: center;
  color: var(--white);
}
.process-number{
  width: 62px;
  height: 62px;
  line-height: 62px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.4);
  margin: 0 auto 14px;
  font-weight: 700;
  font-size: 1.15rem;
  font-family: var(--font-heading);
  transition: all .3s ease;
}
.process-step:hover .process-number{
  background: var(--white);
  color: var(--kairos-navy);
  transform: scale(1.08);
}
.process-step p{
  font-size: 0.88rem;
  color: rgba(255,255,255,0.85);
  margin: 0;
}

/* ============ VALUES ============ */
.value-card{
  background: var(--kairos-ice-60);
  border-radius: 16px;
  padding: 44px 30px;
  text-align: center;
  height: 100%;
  transition: transform .35s ease, background .35s ease;
  border: 1px solid transparent;
}
.value-card:hover{
  transform: translateY(-6px);
  background: var(--white);
  border-color: var(--kairos-blue-60);
  box-shadow: 0 16px 32px rgba(19,35,67,0.1);
}
.value-icon{
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: var(--kairos-blue);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  margin: 0 auto 18px;
}
.value-greek{
  display: block;
  color: var(--kairos-blue);
  font-style: italic;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 4px;
}
.value-card h4{
  color: var(--kairos-navy);
  font-weight: 700;
  margin-bottom: 14px;
}
.value-card p{
  color: var(--text-muted);
  line-height: 1.75;
  margin: 0;
}

/* ============ STRENGTHS ============ */
.strength-card{
  background: var(--white);
  border-radius: 14px;
  padding: 34px 28px;
  height: 100%;
  box-shadow: 0 8px 22px rgba(19,35,67,0.06);
  transition: transform .3s ease, box-shadow .3s ease;
  border-top: 3px solid var(--kairos-blue);
}
.strength-card:hover{
  transform: translateY(-6px);
  box-shadow: 0 16px 32px rgba(19,35,67,0.12);
}
.strength-card i{
  color: var(--kairos-blue);
  font-size: 1.7rem;
  margin-bottom: 14px;
}
.strength-card h5{
  color: var(--kairos-navy);
  font-weight: 600;
  margin-bottom: 10px;
}
.strength-card p{
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
  font-size: 0.95rem;
}

/* ============ CULTURE LIST ============ */
.culture-list{
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
}
.culture-list li{
  color: var(--kairos-navy);
  font-weight: 500;
  margin-bottom: 14px;
  font-size: 1.02rem;
}
.culture-list i{
  color: var(--kairos-blue);
  margin-right: 10px;
}

.people-card{
  background: linear-gradient(145deg, var(--kairos-navy) 0%, var(--kairos-blue) 100%);
  border-radius: 18px;
  padding: 46px 40px;
  color: var(--white);
  position: relative;
  box-shadow: 0 20px 40px rgba(19,35,67,0.2);
}
.quote-icon-lg{
  font-size: 2.2rem;
  color: rgba(255,255,255,0.3);
  display: block;
  margin-bottom: 16px;
}
.people-quote{
  font-size: 1.15rem;
  line-height: 1.8;
  font-style: italic;
  margin-bottom: 24px;
}
.people-card-footer{
  border-top: 1px solid rgba(255,255,255,0.25);
  padding-top: 16px;
  font-weight: 600;
  letter-spacing: 1px;
  font-size: 0.85rem;
  color: var(--kairos-ice);
  text-transform: uppercase;
}

/* ============ IMPACT ============ */
.impact-section{
  position: relative;
  background: linear-gradient(180deg, var(--kairos-navy) 0%, #0d182e 100%);
  padding: 100px 0;
}
.impact-overlay{
  position: absolute;
  inset: 0;
  background: url('../images/mexico-skyline.jpg') center/cover;
  opacity: 0.12;
}
.impact-section .container{ position: relative; z-index: 2; }
.impact-card{
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 14px;
  padding: 36px 20px;
  text-align: center;
  height: 100%;
  transition: all .3s ease;
}
.impact-card:hover{
  background: rgba(255,255,255,0.12);
  transform: translateY(-6px);
}
.impact-card i{
  color: var(--kairos-ice);
  font-size: 1.8rem;
  margin-bottom: 14px;
}
.impact-card h5{
  color: var(--white);
  font-weight: 500;
  font-size: 1rem;
  margin: 0;
}
.impact-footer-text{
  color: rgba(255,255,255,0.75);
  font-size: 1.02rem;
  line-height: 1.8;
}

/* ============ CONTACT ============ */
.contact-section{
  padding: 100px 0;
  background: var(--white);
}
.contact-form{
  background: var(--kairos-ice-60);
  border-radius: 18px;
  padding: 44px;
}
.contact-form .form-control,
.contact-form .form-select{
  border: 1px solid var(--kairos-gray);
  border-radius: 8px;
  padding: 13px 16px;
  font-size: 0.95rem;
  background: var(--white);
}
.contact-form .form-control:focus,
.contact-form .form-select:focus{
  border-color: var(--kairos-blue);
  box-shadow: 0 0 0 3px rgba(79,108,167,0.15);
}
.hp-field{
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ============ FOOTER ============ */
.footer-section{
  background: var(--kairos-navy);
  color: rgba(255,255,255,0.75);
  padding: 70px 0 28px;
}
.footer-logo{ height: 42px; }
.footer-text{
  font-size: 0.92rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.65);
}
.footer-heading{
  color: var(--white);
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: 1px;
  font-size: 0.9rem;
  text-transform: uppercase;
}
.footer-links{
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li{
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
}
.footer-links a{
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  transition: color .25s ease;
}
.footer-links a:hover{ color: var(--kairos-ice); }
.social-icons a{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: var(--white);
  margin-right: 10px;
  transition: all .3s ease;
}
.social-icons a:hover{
  background: var(--kairos-blue);
  transform: translateY(-3px);
}
.footer-divider{
  border-color: rgba(255,255,255,0.15);
  margin: 40px 0 24px;
}
.footer-copy{
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  margin: 0;
}

/* ============ BACK TO TOP ============ */
#backToTop{
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--kairos-blue);
  color: var(--white);
  border: none;
  font-size: 1.1rem;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: all .3s ease;
  box-shadow: 0 8px 20px rgba(19,35,67,0.25);
}
#backToTop.show{
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
#backToTop:hover{
  background: var(--kairos-navy);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 991px){
  .navbar-collapse{
    background: var(--white);
    margin-top: 16px;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 12px 30px rgba(19,35,67,0.15);
  }
  .navbar-nav .nav-link{
    color: var(--kairos-navy) !important;
  }
  .btn-kairos-outline{
    border-color: var(--kairos-blue) !important;
    color: var(--kairos-blue) !important;
    display: inline-block;
    margin-top: 10px;
  }
  .stats-grid{ margin-top: 30px; }
}

@media (max-width: 767px){
  .section-padding{ padding: 70px 0; }
  .hero-cta{ flex-direction: column; align-items: center; }
  .stats-grid{ grid-template-columns: 1fr 1fr; gap: 14px; }
  .stat-card{ padding: 24px 14px; }
  .stat-number{ font-size: 2.1rem; }
  .contact-form{ padding: 26px; }
  .timeline{ padding-left: 30px; }
  .timeline-marker{ left: -30px; }
}