/* ==========================================================================
   VIA Theme — global layout, utilities, components
   Depends on: tokens.css (loaded first)
   ========================================================================== */

/* ---- Reset / base ---- */
html, body { margin: 0; padding: 0; scroll-behavior: smooth; }
body {
  background: var(--via-paper);
  font-family: var(--font-sans);
  color: var(--via-ink);
  -webkit-font-smoothing: antialiased;
  font-size: var(--text-body-size);
  line-height: var(--text-body-lh);
  text-rendering: optimizeLegibility;
}
*, *::before, *::after { box-sizing: border-box; }
::selection { background: var(--via-signal-soft); color: var(--via-signal-deep); }

/* ---- Headings ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--via-ink);
  margin: 0;
  text-wrap: pretty;
}
p { color: var(--slate-600); line-height: 1.65; text-wrap: pretty; }

/* ---- Skip-to-content ---- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 4px;
  z-index: 999;
  padding: 8px 16px;
  background: var(--via-signal);
  color: white;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
}
.skip-link:focus { left: 16px; }

/* ---- Keyframe animations ---- */
@keyframes draw {
  from { stroke-dashoffset: var(--len, 1000); }
  to   { stroke-dashoffset: 0; }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}
@keyframes flow {
  0% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -40; }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Reveal animation ---- */
/* opacity:0 only applied when JS is active (body.js-reveal set by reveal.js) */
.js-reveal .reveal { opacity: 0; transform: translateY(12px); }
.js-reveal .reveal.in { animation: fadeUp 800ms var(--ease-out-quart) forwards; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.in {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---- Mono inlay ---- */
.inlay {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--slate-100);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--via-ink);
  border: 1px solid var(--slate-200);
  white-space: nowrap;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 600;
  transition:
    background var(--duration-fast) var(--ease-out-quart),
    color var(--duration-fast) var(--ease-out-quart),
    box-shadow var(--duration-fast) var(--ease-out-quart),
    border-color var(--duration-fast) var(--ease-out-quart);
  text-decoration: none;
}
.btn-primary {
  background: var(--via-signal);
  color: white;
  padding: 12px 22px;
  border-radius: 9999px;
  font-size: 14px;
}
.btn-primary:hover { background: var(--via-signal-deep); }
.btn-primary:focus-visible { outline: none; box-shadow: var(--shadow-glow-signal); }

.btn-ghost {
  background: transparent;
  color: var(--via-ink);
  padding: 12px 18px;
  border-radius: 9999px;
  font-size: 14px;
}
.btn-ghost:hover { background: var(--slate-100); }

.btn-secondary {
  background: white;
  color: var(--via-ink);
  padding: 12px 22px;
  border-radius: 9999px;
  font-size: 14px;
  border: 1px solid var(--slate-200);
}
.btn-secondary:hover { border-color: var(--slate-300); box-shadow: var(--shadow-md); }

/* ---- Eyebrow ---- */
.eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--via-signal);
}
.eyebrow.muted { color: var(--slate-500); }

/* ---- Section / container ---- */
section { padding: 96px 32px; position: relative; }
.container { max-width: 1180px; margin: 0 auto; position: relative; }
.container-narrow { max-width: 820px; margin: 0 auto; }

/* Anchor offset for sticky nav */
section[id] { scroll-margin-top: 100px; }

/* ---- Display sizes ---- */
.display-1 { font-size: 76px; line-height: 1.04; letter-spacing: -0.03em; }
.display-2 { font-size: 52px; line-height: 1.08; letter-spacing: -0.025em; }
.display-3 { font-size: 40px; line-height: 1.12; letter-spacing: -0.02em; }

@media (max-width: 900px) {
  section { padding: 64px 24px; }
  .display-1 { font-size: 48px; }
  .display-2 { font-size: 38px; }
  .display-3 { font-size: 30px; }
}

/* ---- Card ---- */
.card {
  background: var(--via-canvas);
  border: 1px solid var(--slate-200);
  border-radius: 16px;
  transition:
    border-color var(--duration-fast) var(--ease-out-quart),
    box-shadow var(--duration-fast) var(--ease-out-quart);
}
.card.hoverable:hover {
  border-color: var(--slate-300);
  box-shadow: var(--shadow-md);
}

/* ---- Hairline / section rule ---- */
.hairline { height: 1px; background: var(--slate-200); }
.section-rule {
  position: relative;
  height: 1px;
  background: var(--slate-200);
  max-width: 1180px;
  margin: 0 auto;
}
.section-rule::before {
  content: '';
  position: absolute;
  left: 0; right: 0; top: -3px;
  height: 7px;
  background: radial-gradient(circle at center, var(--via-signal) 0 1.5px, transparent 2px);
  background-size: 24px 7px;
  opacity: 0.3;
}

/* ---- Sticky nav ---- */
.via-nav {
  position: sticky;
  top: 16px;
  z-index: 50;
  max-width: 1180px;
  margin: 16px auto 0;
  background: rgba(255, 255, 255, 0.65);
  border-radius: 9999px;
  border: 1px solid rgba(37, 99, 235, 0.12);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  box-shadow: 0 2px 6px rgba(15, 23, 41, 0.04);
  transition:
    background var(--duration-fast) var(--ease-out-quart),
    box-shadow var(--duration-fast) var(--ease-out-quart);
}
.via-nav.is-scrolled {
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 8px 24px rgba(30, 64, 175, 0.08);
}
.via-nav__inner {
  padding: 8px 12px 8px 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.via-nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-right: 12px;
}
.via-nav__logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--via-ink);
}
.via-nav__links {
  display: flex;
  gap: 2px;
  margin-left: 4px;
}
.via-nav__links a {
  color: var(--slate-600);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 9999px;
  background: transparent;
  transition:
    background var(--duration-fast) var(--ease-out-quart),
    color var(--duration-fast) var(--ease-out-quart);
  white-space: nowrap;
}
.via-nav__links a:hover { background: var(--slate-100); }
.via-nav__links a.is-active {
  color: var(--via-ink);
  font-weight: 700;
  background: rgba(37, 99, 235, 0.08);
}
.via-nav__cta { margin-left: auto; display: flex; gap: 8px; align-items: center; }

@media (max-width: 880px) {
  .via-nav__links { display: none !important; }
}

/* ---- Top banner ---- */
.via-top-banner {
  background: var(--via-ink);
  color: white;
  padding: 10px 32px;
  text-align: center;
  font-size: 13px;
  position: relative;
  z-index: 60;
}
.via-top-banner a { color: #93C5FD; text-decoration: none; font-weight: 600; }

/* ---- Footer grid ---- */
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 48px;
}
@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr !important; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr !important; }
}

/* ---- Hero detail strip ---- */
.hero-detail-strip {
  display: grid;
  grid-template-columns: 220px 1fr auto;
  gap: 0;
  background: var(--slate-50);
  align-items: start;
}
@media (max-width: 760px) {
  .hero-detail-strip { grid-template-columns: 1fr !important; }
  .hero-detail-strip > div { border-right: none !important; border-bottom: 1px solid var(--slate-200); }
}

/* ---- What is VIA grid ---- */
@media (max-width: 900px) {
  #what .container > .reveal { grid-template-columns: 1fr !important; gap: 32px !important; }
}
@media (max-width: 520px) {
  .what-grid { grid-template-columns: 1fr !important; }
}

/* ---- Problems grid ---- */
.problems-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 1000px) {
  .problems-grid { grid-template-columns: repeat(2, 1fr) !important; }
}
@media (max-width: 560px) {
  .problems-grid { grid-template-columns: 1fr !important; }
}

/* ---- How it works grid ---- */
.how-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
}
@media (max-width: 1000px) {
  .how-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .how-connector { display: none !important; }
}
@media (max-width: 560px) {
  .how-grid { grid-template-columns: 1fr !important; }
}

/* ---- Achieve grid ---- */
.achieve-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.questions-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 48px;
  align-items: start;
}
@media (max-width: 760px) {
  .achieve-grid { grid-template-columns: 1fr !important; }
  .questions-grid { grid-template-columns: 1fr !important; gap: 24px !important; }
}

/* ---- Testimonial ---- */
.testimonial-quote { font-size: 32px; }
@media (max-width: 700px) {
  .testimonial-quote { font-size: 22px !important; }
  .oracle-mark { display: none !important; }
}

/* ---- FAQ grid ---- */
.faq-grid { display: grid; grid-template-columns: 380px 1fr; gap: 64px; align-items: start; }
@media (max-width: 900px) {
  .faq-grid { grid-template-columns: 1fr !important; gap: 32px !important; }
}
@media (max-width: 560px) {
  .faq-list button { gap: 12px !important; }
  .faq-list button > span:first-child { gap: 12px !important; }
  .faq-list .faq-question-text { font-size: 16px !important; }
}

/* ---- CTA grid ---- */
.cta-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 880px) {
  .cta-grid { grid-template-columns: 1fr !important; gap: 32px !important; }
}

/* ---- Form inputs ---- */
.via-input,
.via-select {
  width: 100%;
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-family: var(--font-sans);
  outline: none;
  transition:
    border-color var(--duration-fast) var(--ease-out-quart),
    box-shadow var(--duration-fast) var(--ease-out-quart);
}
.via-input:focus,
.via-select:focus {
  box-shadow: var(--shadow-focus);
  border-color: var(--via-signal);
}
.via-select {
  appearance: none;
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

/* ---- Hero section ---- */
.hero-section {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #BFD5F8 0%, #D6E4FB 25%, #E8EFFC 60%, #F4F8FF 100%);
  padding-top: 56px;
  padding-bottom: 100px;
}
.hero-motif-bg {
  position: absolute;
  inset: 0;
  background-size: 1400px auto;
  background-repeat: repeat;
  opacity: 0.18;
  pointer-events: none;
}
.hero-radial-fade {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 30%, rgba(255,255,255,0.55), transparent 70%);
  pointer-events: none;
}
.hero-container { padding: 0 32px; }
.hero-text-center { text-align: center; max-width: 920px; margin: 0 auto; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.7);
  border: 1px solid rgba(37,99,235,0.18);
  padding: 6px 14px 6px 8px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--via-ink);
  box-shadow: 0 2px 6px rgba(30,64,175,0.06);
}
.hero-badge__pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--via-signal);
  color: white;
  padding: 3px 10px;
  border-radius: 9999px;
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero-badge__dot {
  width: 6px;
  height: 6px;
  border-radius: 9999px;
  background: white;
  animation: pulse 2s ease-in-out infinite;
}
.hero-headline__gradient {
  background: linear-gradient(90deg, var(--via-signal) 0%, var(--graph-target) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subhead {
  font-size: 19px;
  line-height: 1.6;
  color: var(--slate-700);
  max-width: 660px;
  margin: 0 auto 36px;
}
.hero-subhead p { margin: 0; color: var(--slate-700); }
.hero-subhead strong { color: var(--via-ink); }
.hero-ctas {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 64px;
  flex-wrap: wrap;
}
.hero-cta-primary  { padding: 14px 26px; font-size: 15px; }
.hero-cta-secondary { padding: 14px 22px; font-size: 15px; }