/* Corevanta Labs — ribbon-fold overlapping panels */
:root {
  --navy:      #183050;
  --navy-mid:  #1d314e;
  --navy-deep: #0a2236;
  --steel:     #4f5f76;
  --mist:      #98a0b0;
  --ice:       #e8f0f8;
  --pale:      #f4f7fa;
  --white:     #ffffff;
  --text:      #0a2236;
  --muted:     #4f5f76;
  --border:    #d0d8e0;
  --ink:       #f4f7fa;

  --radius:  4px;
  --maxw:    1120px;
  --ease:    cubic-bezier(.22, .61, .36, 1);
  --shadow:  0 28px 56px -32px rgba(10, 34, 54, .42);

  --sans:    "Karla", system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Syne", "Karla", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--pale);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, .brand-name, .fold-no, .mfold-no, blockquote {
  font-family: var(--display);
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin: 0;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { margin: 0; }

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

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 200;
  background: var(--navy); color: var(--ink); padding: 10px 16px; font-weight: 600;
}
.skip-link:focus { left: 0; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 26px; border-radius: 2px; font-weight: 700; font-size: 14px;
  letter-spacing: .06em; text-transform: uppercase;
  border: 1px solid transparent; cursor: pointer;
  font-family: var(--display);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.btn-primary {
  background: var(--ice);
  color: var(--navy-deep);
  box-shadow: 0 12px 28px -16px rgba(232, 240, 248, .55);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: rgba(232, 240, 248, .35);
}

/* Header */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(10, 34, 54, .92);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: rgba(232, 240, 248, .12);
  box-shadow: 0 8px 28px -18px rgba(10, 34, 54, .6);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand img { border-radius: 6px; background: var(--white); }
.brand-name { font-size: 18px; font-weight: 700; color: var(--ink); letter-spacing: -0.02em; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a {
  font-size: 13px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--mist); font-weight: 600;
  transition: color .2s var(--ease);
}
.nav .nav-cta {
  color: var(--navy-deep); background: var(--ice); padding: 9px 16px;
  letter-spacing: .1em;
}

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); border-radius: 1px; transition: transform .3s var(--ease), opacity .3s var(--ease); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero — dark band, folding ribbon */
.hero {
  position: relative;
  background: var(--navy-deep);
  color: var(--ink);
  padding: 132px 0 88px;
  overflow: hidden;
}
.hero-grain {
  position: absolute; inset: 0; pointer-events: none; opacity: .35;
  background-image:
    linear-gradient(115deg, transparent 42%, rgba(232, 240, 248, .05) 42.5%, transparent 58%),
    radial-gradient(ellipse at 80% 20%, rgba(232, 240, 248, .08), transparent 55%);
}
.hero-grid {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 40px;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  font-size: 12px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--ice); font-weight: 700; margin: 0 0 20px;
}
.hero h1 {
  font-size: clamp(2.15rem, 5.4vw, 3.7rem);
  font-weight: 800;
  color: #f7fafc;
  max-width: 16ch;
}
.hero-sub {
  margin-top: 22px;
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: #d8e0e8;
  max-width: 46ch;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }

.hero-ribbon { position: relative; min-height: 340px; }
.ribbon-svg {
  width: min(100%, 440px);
  height: auto;
  display: block;
  margin-left: auto;
  filter: drop-shadow(0 18px 28px rgba(0, 0, 0, .35));
}
.ribbon-path {
  stroke: #e8f0f8;
  stroke-width: 3.2;
  stroke-linejoin: miter;
  stroke-linecap: square;
  fill: none;
  stroke-dasharray: 1600;
  stroke-dashoffset: 1600;
  animation: draw-ribbon 4.8s var(--ease) infinite;
}
.ribbon-fold {
  fill: rgba(232, 240, 248, .08);
  stroke: rgba(232, 240, 248, .28);
  stroke-width: 1;
  animation: fold-breathe 5.6s ease-in-out infinite;
  transform-box: fill-box;
  transform-origin: center;
}
.ribbon-fold.f-b { animation-delay: .4s; fill: rgba(232, 240, 248, .12); }
.ribbon-fold.f-c { animation-delay: .8s; }
.ribbon-fold.f-d { animation-delay: 1.2s; fill: rgba(232, 240, 248, .14); }
.ribbon-fold.f-e { animation-delay: 1.6s; }
.rib-bead {
  fill: #e8f0f8;
  animation: bead-pulse 2.8s ease-in-out infinite;
}
.rib-bead.b2 { animation-delay: .3s; }
.rib-bead.b3 { animation-delay: .6s; }
.rib-bead.b4 { animation-delay: .9s; }
.rib-bead.b5 { animation-delay: 1.2s; }
.rib-bead.b6 { animation-delay: 1.5s; }
.ribbon-caption {
  margin: 14px 0 0;
  text-align: right;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
  font-weight: 700;
}

@keyframes draw-ribbon {
  0% { stroke-dashoffset: 1600; }
  42% { stroke-dashoffset: 0; }
  78% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -1600; }
}
@keyframes fold-breathe {
  0%, 100% { opacity: .55; }
  50% { opacity: 1; }
}
@keyframes bead-pulse {
  0%, 100% { opacity: .45; r: 4; }
  50% { opacity: 1; r: 6; }
}

/* Sections */
.section { padding: 96px 0; }
.section-alt { background: var(--white); border-block: 1px solid var(--border); }
.kicker {
  font-size: 12px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--navy); font-weight: 700; margin: 0 0 12px;
}
.section-head { max-width: 680px; margin: 0 0 56px; }
.section-head h2 { font-size: clamp(1.85rem, 3.6vw, 2.8rem); font-weight: 700; }
.section-head .lead { color: var(--muted); margin-top: 16px; font-size: 1.05rem; }
.section-head.light .kicker { color: var(--ice); }
.section-head.light h2 { color: #f7fafc; }
.section-head.light .lead { color: #c8d0d8; }

/* Ribbon-fold overlapping panels */
.folds {
  position: relative;
  isolation: isolate;
  padding: 8px 0 20px;
}
.fold {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  padding: 40px 44px 42px;
  box-shadow: var(--shadow);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.fold::before {
  content: "";
  position: absolute; left: 0; top: 18px; bottom: 18px; width: 4px;
  background: var(--navy);
}
.fold-ear {
  position: absolute;
  top: 0; right: 0;
  width: 0; height: 0;
  border-top: 46px solid var(--ice);
  border-left: 46px solid transparent;
  filter: drop-shadow(-2px 2px 0 rgba(10, 34, 54, .08));
}
.fold-ear::after {
  content: "";
  position: absolute;
  top: -46px; right: 0;
  width: 0; height: 0;
  border-top: 46px solid rgba(10, 34, 54, .12);
  border-left: 46px solid transparent;
  transform: scale(.42) translate(28px, -6px);
}
.fold-no {
  display: block;
  font-size: 13px; letter-spacing: .22em; font-weight: 700;
  color: var(--navy); margin-bottom: 10px;
}
.fold-label {
  font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--steel); font-weight: 700; margin: 0 0 8px;
}
.fold h3 { font-size: clamp(1.45rem, 2.6vw, 2rem); margin-bottom: 12px; }
.fold p { color: var(--muted); max-width: 54ch; }

.fold.f1 { z-index: 3; width: 88%; }
.fold.f2 { z-index: 4; width: 88%; margin: -52px 0 0 12%; }
.fold.f3 { z-index: 5; width: 88%; margin: -52px 0 0 0; }

/* Method — dark band with overlapping method folds */
.method-band {
  background: var(--navy);
  color: var(--ink);
  position: relative;
  overflow: hidden;
}
.method-band::before {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(
    -18deg,
    transparent 0 46px,
    rgba(232, 240, 248, .035) 46px 48px
  );
  pointer-events: none;
}
.method-folds {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}
.mfold {
  position: relative;
  background: rgba(10, 34, 54, .55);
  border: 1px solid rgba(232, 240, 248, .16);
  padding: 28px 28px 32px;
  color: var(--ink);
  margin-top: -18px;
  transition: transform .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease);
}
.mfold:nth-child(1) { z-index: 1; margin-top: 0; margin-right: 28px; }
.mfold:nth-child(2) { z-index: 2; margin-left: 28px; margin-top: 28px; }
.mfold:nth-child(3) { z-index: 3; margin-right: 28px; margin-top: -8px; }
.mfold:nth-child(4) { z-index: 4; margin-left: 28px; margin-top: 20px; }
.mfold::after {
  content: "";
  position: absolute; top: 0; right: 0;
  border-top: 28px solid rgba(232, 240, 248, .14);
  border-left: 28px solid transparent;
}
.mfold-no {
  display: block;
  font-size: 12px; letter-spacing: .2em;
  color: var(--ice); margin-bottom: 10px;
}
.mfold h3 { font-size: 1.45rem; color: #f7fafc; margin-bottom: 10px; }
.mfold p { color: #d0d8e0; }

/* Pull quote */
.quote-wrap {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  position: relative;
}
.quote-mark {
  display: block;
  font-family: var(--display);
  font-size: 5.5rem;
  line-height: .55;
  color: var(--navy);
  opacity: .28;
}
.quote-wrap blockquote {
  font-weight: 700;
  font-size: clamp(1.55rem, 3.4vw, 2.45rem);
  line-height: 1.22;
  color: var(--navy-deep);
}
.quote-attr {
  margin-top: 22px;
  color: var(--muted);
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 700;
}

/* FAQ */
.faq-wrap {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.faq-head { margin: 0; position: sticky; top: 100px; }
.faq-list { display: grid; gap: 12px; }
.faq-item {
  background: var(--pale);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.faq-item.open { border-color: var(--navy); }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: none; border: 0; cursor: pointer; text-align: left; color: var(--text);
  font-family: var(--display); font-size: 1.08rem; font-weight: 700; padding: 20px 22px;
}
.faq-ico { position: relative; flex: 0 0 auto; width: 16px; height: 16px; }
.faq-ico::before, .faq-ico::after {
  content: ""; position: absolute; background: var(--navy); border-radius: 1px;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.faq-ico::before { top: 7px; left: 0; width: 16px; height: 2px; }
.faq-ico::after { top: 0; left: 7px; width: 2px; height: 16px; }
.faq-item.open .faq-ico::after { transform: scaleY(0); opacity: 0; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item.open .faq-a { max-height: 320px; }
.faq-a p { color: var(--muted); margin: 0; padding: 0 22px 22px; font-size: .98rem; }

/* Contact */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contact-copy h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); margin-bottom: 16px; }
.contact-copy p { color: var(--muted); margin-bottom: 20px; }
.contact-email {
  display: inline-block;
  font-family: var(--display);
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--navy);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.contact-addr { margin-top: 18px; color: var(--muted); font-size: .98rem; line-height: 1.55; }
.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 28px;
  display: grid;
  gap: 16px;
  box-shadow: var(--shadow);
  position: relative;
}
.contact-form::after {
  content: "";
  position: absolute; top: 0; right: 0;
  border-top: 36px solid var(--ice);
  border-left: 36px solid transparent;
}
.field { display: grid; gap: 7px; }
.field label { font-size: 13px; color: var(--muted); font-weight: 600; }
.field input, .field textarea {
  background: var(--pale); border: 1px solid var(--border); border-radius: 2px; color: var(--text);
  padding: 12px 14px; font: inherit; font-size: 15px; transition: border-color .2s var(--ease);
  width: 100%; resize: vertical;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--navy); }
.contact-form .btn-primary {
  background: var(--navy);
  color: var(--ink);
  justify-self: start;
}

/* Footer — dark band, near-white text */
.site-footer {
  background: var(--navy-deep);
  color: #f4f7fa;
  padding: 54px 0 30px;
}
.site-footer .brand-name { color: #f4f7fa; }
.footer-inner {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 30px; flex-wrap: wrap;
  padding-bottom: 34px; border-bottom: 1px solid rgba(232, 240, 248, .14);
}
.footer-tag { color: #d0d8e0; margin: 14px 0 0; font-size: .95rem; }
.footer-nav { display: flex; gap: 26px; flex-wrap: wrap; }
.footer-nav a { color: #d0d8e0; font-size: 14px; letter-spacing: .08em; text-transform: uppercase; font-weight: 600; }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  color: #c0c8d0; font-size: 14px; padding-top: 22px;
}

/* Reveal */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .ribbon-path, .ribbon-fold, .rib-bead { animation: none; }
  .ribbon-path { stroke-dashoffset: 0; }
}

/* Hover AFTER reveal.in so lift is not overwritten */
@media (hover: hover) and (pointer: fine) {
  .nav a:hover { color: #f7fafc; }
  .nav .nav-cta:hover { transform: translateY(-2px); background: #ffffff; }
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 32px -12px rgba(232, 240, 248, .55);
  }
  .hero .btn-ghost:hover {
    border-color: var(--ice);
    color: #ffffff;
    transform: translateY(-2px);
  }
  .contact-form .btn-primary:hover {
    background: #102848;
    color: #f7fafc;
    transform: translateY(-2px);
  }
  .fold.reveal.in:hover,
  .fold:hover {
    transform: translateY(-8px);
    border-color: var(--navy);
    box-shadow: 0 32px 56px -28px rgba(10, 34, 54, .5);
    z-index: 8;
  }
  .mfold.reveal.in:hover,
  .mfold:hover {
    transform: translateY(-6px);
    background: rgba(10, 34, 54, .82);
    border-color: rgba(232, 240, 248, .42);
  }
  .faq-item:hover { border-color: var(--navy); }
  .faq-q:hover { color: var(--navy); }
  .contact-email:hover { border-bottom-color: var(--navy); }
  .footer-nav a:hover { color: #ffffff; }
  .contact-form.reveal.in:hover,
  .contact-form:hover { border-color: var(--navy); }
}

/* Responsive */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-ribbon { min-height: 0; }
  .ribbon-svg { margin: 0 auto; width: min(100%, 340px); }
  .ribbon-caption { text-align: center; }
  .fold.f1, .fold.f2, .fold.f3 { width: 100%; margin-left: 0; }
  .fold.f2, .fold.f3 { margin-top: 18px; }
  .method-folds { grid-template-columns: 1fr; }
  .mfold:nth-child(1),
  .mfold:nth-child(2),
  .mfold:nth-child(3),
  .mfold:nth-child(4) {
    margin: 0 0 16px 0;
  }
  .faq-wrap { grid-template-columns: 1fr; gap: 28px; }
  .faq-head { position: static; }
  .contact-inner { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed; inset: 74px 0 auto 0; flex-direction: column; gap: 4px; align-items: stretch;
    background: rgba(10, 34, 54, .98); backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(232, 240, 248, .14);
    padding: 16px 24px 24px; transform: translateY(-130%); transition: transform .35s var(--ease); z-index: 90;
  }
  .nav.open { transform: translateY(0); }
  .nav a { padding: 12px 4px; font-size: 16px; border-bottom: 1px solid rgba(232, 240, 248, .12); color: #e8f0f8; }
  .nav .nav-cta { text-align: center; margin-top: 10px; }
  .hero { padding: 118px 0 64px; }
  .section { padding: 64px 0; }
  .fold { padding: 28px 22px 30px; }
  .mfold { padding: 24px 22px 26px; }
}

@media (max-width: 420px) {
  .container { padding: 0 18px; }
  .hero h1 { font-size: 2.05rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .header-inner { height: 66px; }
  .brand-name { font-size: 16px; }
  .fold-ear { border-top-width: 34px; border-left-width: 34px; }
  .contact-form { padding: 22px 18px; }
  .footer-inner { flex-direction: column; }
  .quote-mark { font-size: 4rem; }
}