/* ============ HELIX TANKERS — Design Tokens ============ */
:root{
  --navy-950: #060f24;
  --navy-900: #0a1a35;
  --navy-800: #0e2348;
  --navy-700: #14315f;
  --blue-500: #3b6bc9;
  --blue-400: #6f94dd;
  --ice-300: #a9c2e8;
  --ice-100: #eef3fb;
  --white: #ffffff;
  --sand: #f6f8fc;
  --ink: #0b1526;
  --muted: #5a6b85;
  --success: #21c07a;

  --font-display: 'Space Grotesk', 'Manrope', sans-serif;
  --font-body: 'Manrope', sans-serif;

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 8px;

  --shadow-soft: 0 20px 60px -20px rgba(6, 15, 36, 0.35);
  --shadow-card: 0 12px 32px -12px rgba(6, 15, 36, 0.18);

  --container-w: 1200px;
  --header-h: 94px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body{
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
h1,h2,h3,h4{ font-family: var(--font-display); margin: 0; line-height: 1.15; color: var(--navy-950); }
p{ margin: 0; }
button{ font-family: inherit; cursor: pointer; }

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

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue-500);
}
.eyebrow::before{
  content: '';
  width: 22px;
  height: 2px;
  background: var(--blue-500);
  display: inline-block;
}

/* ============ Buttons ============ */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .01em;
  border: 1.5px solid transparent;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease, border-color .25s ease;
  white-space: nowrap;
}
.btn-primary{
  background: linear-gradient(135deg, var(--blue-500), var(--navy-700));
  color: var(--white);
  box-shadow: 0 10px 30px -8px rgba(59,107,201,.55);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 16px 36px -8px rgba(59,107,201,.65); }
.btn-ghost{
  background: rgba(255,255,255,.08);
  color: var(--white);
  border-color: rgba(255,255,255,.4);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover{ background: rgba(255,255,255,.18); border-color: rgba(255,255,255,.7); transform: translateY(-2px); }
.btn-sm{ padding: 10px 20px; font-size: 13px; }
.brochure-download{ display: inline-flex; align-items: center; gap: 9px; }
.brochure-download svg{ flex-shrink: 0; }

/* ============ Header ============ */
.site-header{
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid #e7ecf4;
  box-shadow: 0 2px 20px -10px rgba(6,15,36,.08);
  transition: box-shadow .3s ease;
}
.site-header.scrolled{
  box-shadow: 0 8px 30px -12px rgba(6,15,36,.18);
}
.header-inner{
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand{ display: flex; align-items: center; gap: 12px; }
.brand-logo{ width: 78px; height: 78px; object-fit: contain; border-radius: 10px; background: rgba(255,255,255,.06); }
.brand-text{ display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong{ color: var(--navy-950); font-family: var(--font-display); font-size: 17px; letter-spacing: .04em; }
.brand-text small{ color: var(--muted); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; }

.main-nav{ display: flex; align-items: center; gap: 34px; }
.main-nav a{
  color: var(--navy-800);
  font-size: 16.5px;
  font-weight: 600;
  position: relative;
  padding: 6px 0;
  white-space: nowrap;
  transition: color .2s ease;
}
.main-nav a::after{
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--blue-500);
  transition: width .25s ease;
}
.main-nav a:hover{ color: var(--blue-500); }
.main-nav a:hover::after{ width: 100%; }

.header-actions{ display: flex; align-items: center; gap: 14px; }
.lang-toggle{
  background: var(--sand);
  border: 1px solid #dde5f2;
  color: var(--navy-900);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .06em;
}
.lang-opt{ opacity: .5; transition: opacity .2s ease; }
html[data-lang="es"] .lang-opt[data-set="es"]{ opacity: 1; }
html[data-lang="en"] .lang-opt[data-set="en"]{ opacity: 1; }

.burger{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  background: transparent;
  border: none;
}
.burger span{ width: 22px; height: 2px; background: var(--navy-900); border-radius: 2px; transition: transform .25s ease, opacity .25s ease; margin: 0 auto; }

/* ============ Hero ============ */
.hero{
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}
.hero-media{ position: absolute; inset: 0; z-index: -1; background: var(--navy-950); }
.hero-media img, .hero-media video{ width: 100%; height: 100%; object-fit: cover; }
.hero-overlay{
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(6,15,36,.42) 0%, rgba(6,15,36,.28) 38%, rgba(6,15,36,.68) 100%),
    linear-gradient(100deg, rgba(6,15,36,.62) 8%, rgba(6,15,36,.18) 55%, rgba(6,15,36,.05) 100%);
}
.hero .eyebrow{ color: var(--blue-400); text-shadow: 0 2px 10px rgba(0,0,0,.6); }
.hero .eyebrow::before{ background: var(--blue-400); }
.hero-content{
  padding-top: var(--header-h);
  color: var(--white);
  width: 100%;
}
.hero-inner{
  max-width: 820px;
  text-align: left;
  animation: fadeUp .9s ease both;
}
.hero-sub{ display: block; margin-top: 22px; font-size: 18px; line-height: 1.6; color: rgba(255,255,255,.85); max-width: 720px; }
.hero h1{
  margin-top: 18px;
  font-size: clamp(38px, 5.4vw, 66px);
  font-weight: 700;
  color: var(--white);
  letter-spacing: -.01em;
}
.hero-cta{ display: flex; flex-wrap: wrap; justify-content: flex-start; gap: 16px; margin-top: 34px; }
.hero-stats{
  display: flex;
  justify-content: flex-start;
  gap: 40px;
  margin-top: 56px;
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,.18);
  flex-wrap: wrap;
}
.stat{ display: flex; flex-direction: column; gap: 4px; }
.stat-num{ font-family: var(--font-display); font-size: 30px; font-weight: 700; color: var(--white); }
.stat-label{ font-size: 12.5px; color: var(--ice-300); text-transform: uppercase; letter-spacing: .08em; }

.scroll-cue{
  position: absolute;
  left: 50%; bottom: 28px;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 2px solid rgba(255,255,255,.55);
  border-radius: 20px;
}
.scroll-cue span{
  position: absolute; top: 8px; left: 50%;
  width: 4px; height: 8px;
  background: var(--white);
  border-radius: 3px;
  transform: translateX(-50%);
  animation: cue 1.8s ease infinite;
}
@keyframes cue{ 0%{ opacity:1; top:8px;} 70%{ opacity:0; top:22px;} 100%{opacity:0; top:8px;} }
@keyframes fadeUp{ from{ opacity:0; transform: translateY(24px);} to{ opacity:1; transform: translateY(0);} }

/* ============ Section shell ============ */
.section{ padding: 110px 0; position: relative; }
.section-head{ max-width: 680px; margin: 0 auto 56px; text-align: center; }
.section-head h2{ margin-top: 16px; font-size: clamp(30px, 4vw, 44px); }
.section-head p{ margin-top: 18px; color: var(--muted); font-size: 17px; line-height: 1.65; }

/* ============ About ============ */
.lead-statement{
  background: var(--white);
  padding: 64px 0 90px;
}
.lead-statement h2{
  text-align: left;
  max-width: 960px;
  font-family: var(--font-display);
  font-size: clamp(32px, 5.2vw, 58px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.15;
  color: var(--navy-950);
}
.lead-statement h2 span,
.fleet .section-head h2 span,
.fleet-subhead h3 span{
  color: var(--blue-500);
  background: linear-gradient(120deg, var(--blue-500), var(--navy-700));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.about{
  background: var(--sand);
  position: relative;
  overflow: hidden;
  padding: 0;
  min-height: 680px;
  display: flex;
  align-items: stretch;
}
.about-media{
  position: absolute;
  inset: 0;
  left: 0;
  width: 48%;
  height: 100%;
  border-radius: 0;
  box-shadow: none;
  overflow: hidden;
}
.about-media img, .about-media video{ width: 100%; height: 100%; object-fit: cover; display: block; }

.about-grid{
  width: 100%;
  display: flex;
  justify-content: flex-end;
}
.about-copy{
  width: 100%;
  max-width: 760px;
  margin-left: 48%;
  padding: 110px max(24px, calc((100vw - 1200px) / 2 + 24px)) 110px 56px;
  box-sizing: border-box;
}
.about-badge{
  position: absolute;
  left: 24px; bottom: 24px;
  background: rgba(6,15,36,.85);
  backdrop-filter: blur(10px);
  color: var(--white);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 2px;
  border: 1px solid rgba(255,255,255,.15);
}
.about-badge strong{ font-family: var(--font-display); font-size: 16px; }
.about-badge span{ font-size: 12.5px; color: var(--ice-300); }

.about-copy h2{ margin-top: 16px; }
.about-copy p{ margin-top: 18px; color: var(--muted); font-size: 16.5px; line-height: 1.7; }
.check-list{ margin-top: 26px; display: flex; flex-direction: column; gap: 14px; }
.check-list li{
  position: relative;
  padding-left: 32px;
  font-weight: 600;
  color: var(--navy-900);
  font-size: 15.5px;
}
.check-list li::before{
  content: '✓';
  position: absolute; left: 0; top: -1px;
  width: 22px; height: 22px;
  background: var(--success);
  color: var(--white);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

/* ============ Fleet ============ */
.fleet{ background: var(--white); }
.fleet .section-head h2{
  font-size: clamp(32px, 5.2vw, 58px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.15;
}

.fleet-capabilities{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  padding-bottom: 54px;
  border-bottom: 1px solid #e7ecf4;
}
.capability-col h3{ font-size: 22px; }
.capability-col h3 span{ display: block; color: var(--blue-500); font-size: 16px; font-weight: 600; margin-top: 4px; }
.capability-col > p{ margin-top: 14px; color: var(--muted); line-height: 1.6; font-size: 15px; }
.bullet-list{ margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }
.bullet-list li{
  position: relative;
  padding-left: 26px;
  color: var(--navy-900);
  font-size: 15px;
  line-height: 1.5;
}
.bullet-list li::before{
  content: '';
  position: absolute; left: 0; top: 6px;
  width: 9px; height: 9px;
  background: var(--blue-500);
  border-radius: 3px;
  transform: rotate(45deg);
}

.units-wrap{ position: relative; }
.units-bg-video{
  position: absolute;
  top: 50%; left: 50%;
  width: 130%;
  height: 130%;
  min-width: 900px;
  transform: translate(-50%, -50%);
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
  opacity: .5;
  filter: grayscale(1) brightness(1.85) contrast(.85);
  mix-blend-mode: multiply;
  -webkit-mask-image: radial-gradient(ellipse 60% 60% at center, #000 30%, transparent 78%);
  mask-image: radial-gradient(ellipse 60% 60% at center, #000 30%, transparent 78%);
}
.units-wrap > .fleet-subhead,
.units-wrap > .fleet-card-grid{ position: relative; z-index: 1; }

.fleet-subhead{ margin-top: 54px; text-align: center; }
.fleet-subhead h3{
  font-family: var(--font-display);
  font-size: clamp(32px, 5.2vw, 58px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.15;
}

.fleet-card-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 32px;
}
.vessel-card{
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
  box-shadow: var(--shadow-card);
  border: 1px solid #eef1f8;
  transition: transform .3s ease, box-shadow .3s ease;
}
.vessel-card:hover{ transform: translateY(-6px); box-shadow: var(--shadow-soft); }
.vessel-card-media{ height: 190px; overflow: hidden; }
.vessel-card-media img{ width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.vessel-card:hover .vessel-card-media img{ transform: scale(1.08); }
.vessel-card-body{ padding: 16px 18px 20px; display: flex; flex-direction: column; gap: 4px; }
.vessel-card-body strong{ font-family: var(--font-display); font-size: 16px; color: var(--navy-950); }
.vessel-card-body span{ font-size: 13px; color: var(--muted); font-weight: 600; }

.spec-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 56px;
}
.spec-table{
  border: 1px solid #e2e8f4;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--sand);
}
.spec-table-title{
  background: linear-gradient(120deg, var(--navy-900), var(--navy-700));
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .04em;
  text-transform: uppercase;
  padding: 12px 18px;
}
.spec-table table{ width: 100%; border-collapse: collapse; }
.spec-table th, .spec-table td{
  text-align: left;
  padding: 11px 18px;
  font-size: 14px;
  border-top: 1px solid #e2e8f4;
}
.spec-table th{ color: var(--muted); font-weight: 600; width: 52%; }
.spec-table td{ color: var(--navy-950); font-weight: 700; }
.spec-table tr:first-child th, .spec-table tr:first-child td{ border-top: none; }

/* ============ Services ============ */
.services{ position: relative; overflow: hidden; }
.services-media{ position: absolute; inset: 0; z-index: 0; background: var(--navy-950); }
.services-media video{ width: 100%; height: 100%; object-fit: cover; }
.services-overlay{
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(6,15,36,.3) 0%, rgba(6,15,36,.18) 55%, rgba(6,15,36,.4) 100%);
}
.services > .container{ position: relative; z-index: 1; }
.services .eyebrow{ color: var(--blue-400); text-shadow: 0 2px 10px rgba(0,0,0,.55); }
.services .eyebrow::before{ background: var(--blue-400); }
.services .section-head h2{ color: var(--white); text-shadow: 0 3px 14px rgba(0,0,0,.5); }
.services .section-head p{ color: rgba(255,255,255,.95); text-shadow: 0 2px 10px rgba(0,0,0,.55); }
.services-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card{
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  box-shadow: var(--shadow-card);
  border: 1px solid #eef1f8;
  text-align: center;
  transition: transform .3s ease, box-shadow .3s ease;
}
.service-card:hover{ transform: translateY(-8px); box-shadow: var(--shadow-soft); }
.service-icon{
  width: 93px; height: 93px;
  border-radius: 20px;
  background: var(--ice-100);
  border: 1px solid #dde7f7;
  color: var(--blue-500);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 24px;
}
.service-icon svg{ width: 45px; height: 45px; }
.service-icon img{ width: 70px; height: 70px; object-fit: contain; }
.service-card h3{ font-size: 21px; margin-bottom: 12px; }
.service-card p{ color: var(--muted); font-size: 15px; line-height: 1.65; }
.learn-more{
  display: inline-flex;
  margin-top: 18px;
  color: var(--blue-500);
  font-weight: 700;
  font-size: 14px;
  transition: gap .2s ease;
}
.learn-more:hover{ color: var(--navy-900); }

/* ============ Contact ============ */
.contact{ background: var(--navy-950); color: var(--white); }
.contact-grid{
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 64px;
}
.contact .eyebrow{ color: var(--blue-400); }
.contact .eyebrow::before{ background: var(--blue-400); }
.contact-copy h2{ color: var(--white); margin-top: 16px; font-size: clamp(28px, 3.6vw, 40px); }
.contact-copy p{ margin-top: 18px; color: rgba(255,255,255,.72); line-height: 1.7; font-size: 16px; }

.contact-list{ margin-top: 34px; display: flex; flex-direction: column; gap: 22px; }
.contact-copy > .brochure-download{ margin-top: 34px; }
.contact-list li{ display: flex; align-items: flex-start; gap: 16px; }
.contact-icon{
  width: 42px; height: 42px;
  border-radius: 12px;
  background: rgba(255,255,255,.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,.14);
}
.contact-list strong{ display: block; font-size: 13.5px; color: var(--ice-300); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 3px; }
.contact-list span, .contact-list a{ font-size: 15.5px; font-weight: 600; color: var(--white); }
.contact-list a:hover{ color: var(--blue-400); }

.contact-form{
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.contact-form h3{ color: var(--white); font-size: 22px; margin-bottom: 6px; }
.hp-field{
  position: absolute;
  left: -5000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.form-row{ display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-form label{ display: flex; flex-direction: column; gap: 8px; font-size: 13.5px; color: var(--ice-300); font-weight: 600; }
.contact-form input, .contact-form select, .contact-form textarea{
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius-sm);
  padding: 13px 14px;
  color: var(--white);
  font-family: inherit;
  font-size: 15px;
  resize: vertical;
  transition: border-color .2s ease, background .2s ease;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus{
  outline: none;
  border-color: var(--blue-400);
  background: rgba(255,255,255,.1);
}
.contact-form select{ color-scheme: dark; }
.contact-form .btn{ margin-top: 6px; width: 100%; }
.form-note{ font-size: 12.5px; color: rgba(255,255,255,.5); text-align: center; }

/* ============ Footer ============ */
.site-footer{ background: var(--navy-900); color: rgba(255,255,255,.75); padding: 60px 0 0; }
.footer-inner{
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand{ display: flex; flex-direction: column; gap: 14px; }
.footer-brand img{
  width: 62px; height: 62px;
  object-fit: contain;
  border-radius: 10px;
  background: rgba(255,255,255,.06);
  filter: brightness(0) invert(1);
}
.footer-brand-name{
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: .04em;
  color: var(--white);
}
.footer-brand p{ font-size: 14px; color: rgba(255,255,255,.55); max-width: 260px; }
.footer-col h4{
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 18px;
}
.footer-nav{ display: flex; flex-direction: column; gap: 12px; }
.footer-nav a{ font-size: 14.5px; font-weight: 600; color: rgba(255,255,255,.8); }
.footer-nav a:hover{ color: var(--blue-400); }
.footer-contact{ display: flex; flex-direction: column; gap: 12px; font-size: 14.5px; }
.footer-contact a{ font-weight: 600; color: var(--white); }
.footer-location{ display: inline-flex; align-items: center; gap: 8px; }
.flag-icon{ width: 20px; height: 14px; border-radius: 2px; flex-shrink: 0; box-shadow: 0 0 0 1px rgba(255,255,255,.15); }
.footer-bottom{ padding: 24px; text-align: center; font-size: 13px; color: rgba(255,255,255,.45); }

/* ============ Reveal on scroll ============ */
.reveal{ opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in-view{ opacity: 1; transform: translateY(0); }

.reveal-left{
  opacity: 0;
  will-change: transform, opacity;
  transform: translateX(-120px);
  transition: opacity 1.1s ease, transform 1.1s cubic-bezier(.16,.8,.24,1);
}
.reveal-left.in-view{ opacity: 1; transform: translateX(0); }

.reveal-right{
  opacity: 0;
  will-change: transform, opacity;
  transform: translateX(120px);
  transition: opacity 1.1s ease, transform 1.1s cubic-bezier(.16,.8,.24,1);
}
.reveal-right.in-view{ opacity: 1; transform: translateX(0); }

@media (prefers-reduced-motion: reduce){
  .reveal-left, .reveal-right{ transition: none; }
}

/* ============ Responsive ============ */
@media (max-width: 1080px){
  .main-nav{ gap: 20px; }
  .header-actions{ gap: 10px; }
}

@media (max-width: 980px){
  .contact-grid{ grid-template-columns: 1fr; gap: 44px; }
  .about{ flex-direction: column; min-height: 0; }
  .about-media{ position: relative; inset: auto; width: 100%; height: 380px; }
  .about-grid{ justify-content: stretch; }
  .about-copy{ width: 100%; max-width: none; margin-left: 0; padding: 56px 24px; }
  .fleet-capabilities{ grid-template-columns: 1fr; gap: 36px; }
  .fleet-card-grid{ grid-template-columns: repeat(2, 1fr); }
  .spec-grid{ grid-template-columns: 1fr; }
  .services-grid{ grid-template-columns: repeat(2, 1fr); }
  .footer-inner{ grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px){
  :root{ --header-h: 72px; }
  .main-nav{
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    background: rgba(6,15,36,.98);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 10px 24px 26px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform .3s ease, opacity .3s ease;
    border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .main-nav.open{ transform: translateY(0); opacity: 1; pointer-events: auto; }
  .main-nav a{ width: 100%; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.08); color: var(--white); }
  .main-nav a:hover{ color: var(--blue-400); }
  .header-actions .btn-sm{ display: none; }
  .burger{ display: flex; }

  .hero-stats{ gap: 26px; }
  .fleet-card-grid{ grid-template-columns: 1fr; }
  .services-grid{ grid-template-columns: 1fr; }
  .form-row{ grid-template-columns: 1fr; }
  .footer-inner{ grid-template-columns: 1fr; text-align: left; }
  .section{ padding: 76px 0; }
}

/* ============ Floating action buttons ============ */
.whatsapp-float{
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #25D366;
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 28px -8px rgba(37, 211, 102, .65);
  z-index: 900;
  transition: transform .25s ease, box-shadow .25s ease;
}
.whatsapp-float:hover{ transform: translateY(-3px) scale(1.05); box-shadow: 0 16px 34px -6px rgba(37, 211, 102, .75); }
.whatsapp-float::after{
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(37, 211, 102, .55);
  animation: wa-pulse 2.4s ease-out infinite;
}
@keyframes wa-pulse{
  0%{ box-shadow: 0 0 0 0 rgba(37, 211, 102, .5); }
  70%{ box-shadow: 0 0 0 16px rgba(37, 211, 102, 0); }
  100%{ box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

.back-to-top{
  position: fixed;
  right: 24px;
  bottom: 92px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--navy-900);
  color: var(--white);
  border: 1px solid rgba(255,255,255,.14);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
  z-index: 900;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity .3s ease, transform .3s ease, background .2s ease;
}
.back-to-top.visible{ opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover{ background: var(--blue-500); }

@media (max-width: 760px){
  .whatsapp-float{ right: 18px; bottom: 18px; width: 52px; height: 52px; }
  .back-to-top{ right: 18px; bottom: 80px; width: 44px; height: 44px; }
}

/* ============ Vessel card -> lightbox ============ */
.vessel-card{ cursor: zoom-in; }
.vessel-card-media{ position: relative; }
.vessel-card-media::after{
  content: '';
  position: absolute; inset: 0;
  background: rgba(6,15,36,0);
  transition: background .25s ease;
}
.vessel-card:hover .vessel-card-media::after{ background: rgba(6,15,36,.12); }

.lightbox{
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease, visibility 0s linear .3s;
}
.lightbox.open{ opacity: 1; visibility: visible; transition: opacity .3s ease; }
.lightbox-backdrop{
  position: absolute;
  inset: 0;
  background: rgba(6,15,36,.86);
  backdrop-filter: blur(6px);
}
.lightbox-content{
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 760px;
  max-height: 88vh;
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.6);
  transform: scale(.92) translateY(10px);
  transition: transform .32s cubic-bezier(.2,.9,.25,1.1);
  display: flex;
  flex-direction: column;
}
.lightbox.open .lightbox-content{ transform: scale(1) translateY(0); }
.lightbox-media{ width: 100%; max-height: 68vh; overflow: hidden; background: var(--navy-950); }
.lightbox-media img{ width: 100%; height: 100%; max-height: 68vh; object-fit: contain; display: block; }
.lightbox-caption{ padding: 20px 28px 26px; text-align: center; }
.lightbox-caption strong{ display: block; font-family: var(--font-display); font-size: 20px; color: var(--navy-950); }
.lightbox-caption span{ display: block; margin-top: 4px; font-size: 14px; color: var(--muted); font-weight: 600; }
.lightbox-close{
  position: absolute;
  top: 14px; right: 14px;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(6,15,36,.55);
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  z-index: 2;
  transition: background .2s ease, transform .2s ease;
}
.lightbox-close:hover{ background: var(--blue-500); transform: rotate(90deg); }

@media (max-width: 560px){
  .lightbox-content{ max-height: 92vh; }
  .lightbox-media{ max-height: 50vh; }
  .lightbox-media img{ max-height: 50vh; }
  .lightbox-caption{ padding: 16px 18px 20px; }
}