/* ============================================================
   Helvetic Keystone Sàrl — Website
   Central stylesheet
   ============================================================ */

:root {
  /* Colors */
  --navy-950: #081826;
  --navy-900: #0B1D2E;
  --navy-800: #10263B;
  --navy-700: #16334D;
  --navy-600: #1F4464;
  --ink: #1C2B38;
  --muted: #5A6B7A;
  --line: #E3E8ED;
  --bg: #FFFFFF;
  --bg-soft: #F4F6F8;
  --red: #D52B1E;
  --red-dark: #B02318;
  --gold: #B08D57;

  /* Type */
  --font-body: "Public Sans", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Playfair Display", Georgia, "Times New Roman", serif;

  /* Layout */
  --container: 1140px;
  --radius: 10px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 3px rgba(11, 29, 46, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 29, 46, 0.10);
  --shadow-lg: 0 20px 48px rgba(11, 29, 46, 0.16);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* Reset ---------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

a { color: var(--red); text-decoration: none; }
a:hover { color: var(--red-dark); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--navy-900);
  line-height: 1.15;
  margin: 0 0 0.55em;
  font-weight: 700;
}

p { margin: 0 0 1.1em; }

ul { padding-left: 1.2em; }

::selection { background: rgba(213, 43, 30, 0.15); }

/* Utilities ------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.section { padding-block: 84px; }
.section--soft { background: var(--bg-soft); }
.section--navy {
  background: linear-gradient(160deg, var(--navy-800), var(--navy-950));
  color: #DCE4EB;
}
.section--navy h2, .section--navy h3 { color: #FFFFFF; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 14px;
}

.section--navy .eyebrow { color: #E8927F; }

.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(1.9rem, 3.4vw, 2.6rem); margin-bottom: 16px; }
.section-head p { color: var(--muted); font-size: 1.08rem; }
.section--navy .section-head p { color: #AFC0CC; }

.center { text-align: center; }
.center .section-head { margin-inline: auto; }

.text-muted { color: var(--muted); }

/* Buttons --------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.22s var(--ease);
  font-family: var(--font-body);
}

.btn--red { background: var(--red); color: #fff; }
.btn--red:hover { background: var(--red-dark); color: #fff; transform: translateY(-2px); }

.btn--outline { border-color: rgba(255, 255, 255, 0.55); color: #fff; background: transparent; }
.btn--outline:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }

.btn--navy { background: var(--navy-800); color: #fff; }
.btn--navy:hover { background: var(--navy-700); color: #fff; transform: translateY(-2px); }

.btn--ghost { border-color: var(--line); color: var(--navy-900); background: #fff; }
.btn--ghost:hover { border-color: var(--navy-900); color: var(--navy-900); transform: translateY(-2px); }

.btn--lg { padding: 17px 34px; font-size: 16px; }

/* Header ---------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.25s var(--ease);
}
.site-header.scrolled { box-shadow: var(--shadow-md); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 14px;
}

.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark { width: 44px; height: 44px; flex: 0 0 auto; }
.brand__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--navy-900);
  line-height: 1.05;
  display: block;
}
.brand__sub {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.main-nav ul { list-style: none; display: flex; gap: 6px; margin: 0; padding: 0; align-items: center; }
.main-nav a {
  display: block;
  padding: 9px 14px;
  border-radius: 8px;
  color: var(--ink);
  font-weight: 500;
  font-size: 15.5px;
  transition: all 0.18s var(--ease);
}
.main-nav a:hover { color: var(--red); background: var(--bg-soft); }
.main-nav a[aria-current="page"] { color: var(--red); font-weight: 600; }

.nav-cta { margin-left: 10px; }

/* Mobile nav button */
.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--navy-900);
  border-radius: 2px;
  transition: all 0.25s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle span:nth-child(3) { top: 29px; }

body.nav-open .nav-toggle span:nth-child(1) { top: 22px; transform: rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { top: 22px; transform: rotate(-45deg); }

/* Hero ------------------------------------------------------ */
.hero {
  position: relative;
  background:
    radial-gradient(1100px 520px at 88% -10%, rgba(31, 68, 100, 0.55), transparent 60%),
    linear-gradient(150deg, var(--navy-800), var(--navy-950));
  color: #E6ECF1;
  overflow: hidden;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
  padding-block: 96px 88px;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #E8927F;
  margin-bottom: 22px;
}
.hero__eyebrow::before {
  content: "";
  width: 34px; height: 2px;
  background: var(--red);
}
.hero h1 {
  color: #fff;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  margin-bottom: 22px;
}
.hero p.lead {
  color: #B9C9D4;
  font-size: 1.16rem;
  max-width: 34em;
  margin-bottom: 30px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero__facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 52px;
  padding-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}
.hero__fact b {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: #fff;
  line-height: 1.1;
}
.hero__fact span { font-size: 13px; color: #8FA6B5; }

.hero__visual { position: relative; }

.hero__card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  backdrop-filter: blur(6px);
}
.hero__card h3 { color: #fff; font-size: 1.25rem; margin-bottom: 8px; }
.hero__card .hero__card-list { list-style: none; margin: 20px 0 0; padding: 0; }
.hero__card .hero__card-list li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 15px;
  color: #C9D6DF;
}
.hero__card .hero__card-list li:last-child { border-bottom: 0; }
.hero__card .hero__card-list svg { flex: 0 0 auto; margin-top: 3px; }

.hero__keystone {
  position: absolute;
  width: 150px;
  right: -30px;
  top: -30px;
  opacity: 0.5;
  transform: rotate(3deg);
}

/* Trust strip ----------------------------------------------- */
.trust-strip {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.trust-strip__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 18px 44px;
  padding-block: 22px;
}
.trust-strip__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--navy-700);
}
.trust-strip__item svg { color: var(--red); }

/* Cards ----------------------------------------------------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.cards-grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.28s var(--ease);
  position: relative;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: transparent; }
.card__icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--bg-soft);
  color: var(--red);
  margin-bottom: 20px;
}
.card h3 { font-size: 1.22rem; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15.5px; margin-bottom: 0; }

/* Steps ----------------------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 30px 26px 26px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--red);
  display: block;
  margin-bottom: 14px;
  line-height: 1;
}
.step h3 { color: #fff; font-size: 1.15rem; margin-bottom: 8px; }
.step p { color: #AFC0CC; font-size: 15px; margin: 0; }

/* Stats ----------------------------------------------------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  text-align: center;
}
.stat b {
  display: block;
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: #fff;
}
.stat span { color: #8FA6B5; font-size: 14px; letter-spacing: 0.05em; }

/* Split feature -------------------------------------------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.split--reverse .split__media { order: 2; }

.split__media {
  background: linear-gradient(150deg, var(--navy-800), var(--navy-950));
  border-radius: var(--radius-lg);
  min-height: 380px;
  display: grid;
  place-items: center;
  padding: 40px;
  position: relative;
  overflow: hidden;
}
.split__media::after {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  pointer-events: none;
}
.split__media svg { width: 200px; height: auto; opacity: 0.92; }

.check-list { list-style: none; padding: 0; margin: 0 0 26px; }
.check-list li {
  padding: 8px 0 8px 34px;
  position: relative;
  color: var(--ink);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 14px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--red);
  -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z"/></svg>') center/contain no-repeat;
  mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z"/></svg>') center/contain no-repeat;
}

/* Callout --------------------------------------------------- */
.callout {
  border-left: 4px solid var(--red);
  background: var(--bg-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 26px 30px;
  margin: 30px 0;
}
.callout p { margin: 0; color: var(--ink); font-size: 16px; }
.callout strong { color: var(--navy-900); }

.callout--navy {
  background: linear-gradient(150deg, var(--navy-800), var(--navy-950));
  color: #DCE4EB;
}
.callout--navy p { color: #DCE4EB; }
.callout--navy strong { color: #fff; }

/* FAQ ------------------------------------------------------- */
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  margin-bottom: 14px;
  overflow: hidden;
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 26px;
  font-weight: 600;
  color: var(--navy-900);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--red);
  transition: transform 0.25s var(--ease);
  flex: 0 0 auto;
  line-height: 1;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 26px 22px; color: var(--muted); font-size: 15.5px; }

/* CTA band -------------------------------------------------- */
.cta {
  background:
    radial-gradient(900px 400px at 15% 110%, rgba(213, 43, 30, 0.5), transparent 55%),
    linear-gradient(150deg, var(--navy-800), var(--navy-950));
  color: #E6ECF1;
  text-align: center;
}
.cta h2 { color: #fff; font-size: clamp(1.9rem, 3.4vw, 2.6rem); margin-bottom: 16px; }
.cta p { color: #B9C9D4; max-width: 640px; margin: 0 auto 34px; font-size: 1.08rem; }
.cta .btn--red { padding: 17px 36px; font-size: 16px; }
.cta .cta__note { margin-top: 26px; font-size: 13.5px; color: #8FA6B5; }

/* Page hero (subpages) -------------------------------------- */
.page-hero {
  background:
    radial-gradient(900px 400px at 90% -20%, rgba(31, 68, 100, 0.6), transparent 60%),
    linear-gradient(150deg, var(--navy-800), var(--navy-950));
  color: #E6ECF1;
  padding-block: 74px;
}
.page-hero h1 { color: #fff; font-size: clamp(2.2rem, 4.5vw, 3.1rem); margin-bottom: 14px; }
.page-hero p { color: #B9C9D4; max-width: 640px; font-size: 1.12rem; margin: 0; }

/* Prose (legal pages) --------------------------------------- */
.prose { max-width: 780px; }
.prose h2 { font-size: 1.6rem; margin-top: 2.2em; }
.prose h3 { font-size: 1.25rem; margin-top: 1.8em; }
.prose p, .prose li { color: #3E4E5C; }
.prose ul, .prose ol { margin-bottom: 1.2em; }
.prose li { margin-bottom: 0.5em; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: 15px; }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.prose th { background: var(--bg-soft); color: var(--navy-900); }
.prose address { font-style: normal; color: #3E4E5C; }

/* Contact --------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.form { display: grid; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 7px; color: var(--navy-900); }
.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15.5px;
  color: var(--ink);
  background: var(--bg);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--navy-600);
  box-shadow: 0 0 0 3px rgba(31, 68, 100, 0.14);
}
.form-field textarea { resize: vertical; min-height: 150px; }
.form-field .form-hint { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.form .form-error { display: none; color: var(--red); font-size: 13px; margin-top: 6px; }
.form-field.has-error input,
.form-field.has-error textarea { border-color: var(--red); }
.form-field.has-error .form-error { display: block; }

.form-success {
  display: none;
  background: #EAF6EF;
  border: 1px solid #BFE6CD;
  color: #176B3C;
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 15px;
}

.contact-card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-bottom: 22px;
}
.contact-card h3 { font-size: 1.15rem; margin-bottom: 16px; }
.contact-card .contact-line {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 8px 0;
  color: var(--ink);
  font-size: 15.5px;
}
.contact-card .contact-line svg { color: var(--red); flex: 0 0 auto; margin-top: 3px; }
.contact-card a { color: var(--ink); }
.contact-card a:hover { color: var(--red); }

/* Data table (about page) ----------------------------------- */
.data-table { width: 100%; border-collapse: collapse; }
.data-table tr { border-bottom: 1px solid var(--line); }
.data-table th, .data-table td { padding: 14px 6px; text-align: left; font-size: 15.5px; vertical-align: top; }
.data-table th { width: 42%; color: var(--muted); font-weight: 500; }

/* Footer ---------------------------------------------------- */
.site-footer {
  background: var(--navy-950);
  color: #9FB2BF;
  font-size: 15px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
  gap: 44px;
  padding-block: 64px;
}
.footer-top h4 {
  font-family: var(--font-body);
  color: #fff;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 18px;
  font-weight: 700;
}
.footer-top ul { list-style: none; padding: 0; margin: 0; }
.footer-top li { margin-bottom: 10px; }
.footer-top a { color: #9FB2BF; }
.footer-top a:hover { color: #fff; }
.footer-about p { font-size: 14.5px; }
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand .brand__name { color: #fff; }
.footer-brand .brand__sub { color: #7E939F; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  font-size: 13.5px;
}
.footer-bottom .footer-legal { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-bottom a { color: #8FA6B5; }
.footer-bottom a:hover { color: #fff; }

/* Back to top */
.to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--navy-800);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.3s var(--ease);
  z-index: 40;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--red); color: #fff; }

/* Reveal animations ----------------------------------------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* Responsive ------------------------------------------------ */
@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; padding-block: 64px 56px; gap: 40px; }
  .hero__visual { max-width: 460px; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split--reverse .split__media { order: 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .trust-strip__inner { justify-content: flex-start; }

  .nav-toggle { display: block; }
  .main-nav {
    position: fixed;
    inset: 0;
    background: var(--navy-950);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s var(--ease);
  }
  body.nav-open .main-nav { opacity: 1; visibility: visible; transform: none; }
  .main-nav ul { flex-direction: column; gap: 4px; text-align: center; }
  .main-nav a { color: #fff; font-size: 1.15rem; padding: 12px 24px; }
  .main-nav a:hover { background: rgba(255,255,255,0.08); color: #fff; }
  .main-nav a[aria-current="page"] { color: #E8927F; }
  .nav-cta { margin: 18px 0 0; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .section { padding-block: 60px; }
  .cards-grid, .cards-grid--2 { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 34px; }
  .hero__facts { grid-template-columns: 1fr 1fr; }
  .brand__sub { display: none; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}