/* ==========================================================================
   Landing page + single-line header (framework convergence, ADR-001 §5.5).
   Landing rules are scoped under .tap-landing; header rules are site-wide.
   Sizes use px (Material's root font-size is 125%, so rem would inflate).
   ========================================================================== */

/* ---- Single-line header: tabs are inlined by overrides/partials/header.html */
.md-header .md-tabs {
  width: auto;
  background: transparent;
  overflow: visible;
  margin-right: auto;
  /* belt & braces: never let theme scroll-behavior styles hide inline tabs */
  transform: none !important;
  opacity: 1 !important;
  pointer-events: auto !important;
}
/* the repo button's auto-fetched facts (stars / latest release tag) made the
   source link two lines — keep it to icon + repo name */
.md-source__facts { display: none; }
.md-header .md-tabs .md-tabs__list {
  margin: 0;
  white-space: nowrap;
  contain: none;
}
.md-header__title {
  flex-grow: 0;
  width: auto;
  margin-right: 0.4rem;
}
/* the "current page" second topic line is noise in a one-line header */
.md-header__topic + .md-header__topic { display: none; }

/* ---- Shared design tokens (light-first; dark follows Material's scheme) --- */
.tap-landing {
  --tap-bg: #f7fbfa;
  --tap-panel: #ffffff;
  --tap-tint: #edf5f3;
  --tap-teal: #009485;
  --tap-teal-deep: #00695f;
  --tap-teal-soft: rgba(0, 148, 133, 0.1);
  --tap-amber: #c77b16;
  --tap-text: #1d3038;
  --tap-text-dim: #56707a;
  --tap-line: rgba(0, 148, 133, 0.22);
  --tap-shadow: 0 14px 40px rgba(9, 63, 60, 0.1);
  --tap-radius: 16px;
  display: block;
  font-size: 16px;
  line-height: 1.6;
  color: var(--tap-text);
  background: var(--tap-bg);
  overflow-x: hidden;
}
[data-md-color-scheme="slate"] .tap-landing {
  --tap-bg: #0e1a20;
  --tap-panel: #14232b;
  --tap-tint: #0b161c;
  --tap-teal: #00b39b;
  --tap-teal-deep: #00d0b0;
  --tap-teal-soft: rgba(0, 208, 176, 0.1);
  --tap-amber: #ffc46b;
  --tap-text: #dfe9ec;
  --tap-text-dim: #93a7ae;
  --tap-line: rgba(0, 208, 176, 0.22);
  --tap-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
}

/* Hide the (empty) article area + footer-nav on the landing page only. */
.md-container:has(.tap-landing) .md-main { display: none; }

.tap-wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ---- Motion primitives ---------------------------------------------------- */
.tap-enter {
  opacity: 0;
  transform: translateY(22px);
  animation: tap-enter 0.9s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
}
.tap-enter:nth-child(2) { animation-delay: 0.05s; }
.tap-enter:nth-child(3) { animation-delay: 0.18s; }
.tap-enter:nth-child(4) { animation-delay: 0.38s; }
.tap-enter:nth-child(5) { animation-delay: 0.52s; }
.tap-enter:nth-child(6) { animation-delay: 0.66s; }
@keyframes tap-enter { to { opacity: 1; transform: none; } }

.tap-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.tap-reveal.tap-in { opacity: 1; transform: none; }

/* ---- Buttons --------------------------------------------------------------- */
.tap-btn {
  display: inline-block;
  padding: 11px 30px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.tap-btn:hover { transform: translateY(-2px); }
.tap-btn--primary {
  background: linear-gradient(135deg, var(--tap-teal), var(--tap-teal-deep));
  color: #ffffff;
  box-shadow: 0 6px 20px rgba(0, 148, 133, 0.35);
}
.tap-btn--primary:hover { box-shadow: 0 10px 28px rgba(0, 148, 133, 0.45); color: #fff; }
.tap-btn--ghost {
  border: 1px solid var(--tap-line);
  color: var(--tap-text);
  background: var(--tap-panel);
}
.tap-btn--ghost:hover { border-color: var(--tap-teal); color: var(--tap-teal); }
.tap-btn--invert {
  background: #ffffff;
  color: var(--tap-teal-deep);
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.25);
  padding: 14px 42px;
  font-size: 17px;
}

/* ---- Hero ------------------------------------------------------------------ */
.tap-hero {
  position: relative;
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 96px 24px 64px;
  background: linear-gradient(175deg, var(--tap-bg), var(--tap-tint) 70%, var(--tap-bg));
}
.tap-hero__bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.tap-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.3;
  transition: transform 0.4s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.tap-orb--1 { width: 640px; height: 640px; left: -220px; top: -190px;
              background: radial-gradient(circle, rgba(0, 148, 133, 0.5), transparent 65%); }
.tap-orb--2 { width: 460px; height: 460px; right: -160px; bottom: -130px;
              background: radial-gradient(circle, rgba(27, 111, 143, 0.45), transparent 65%); }
.tap-orb--3 { width: 280px; height: 280px; right: 16%; top: 10%;
              background: radial-gradient(circle, rgba(199, 123, 22, 0.3), transparent 65%); }
.tap-gridlines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--tap-teal-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--tap-teal-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.5;
  mask-image: radial-gradient(60% 55% at 50% 45%, #000 0%, transparent 100%);
  -webkit-mask-image: radial-gradient(60% 55% at 50% 45%, #000 0%, transparent 100%);
}
.tap-kicker {
  position: relative;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 700;
  color: var(--tap-teal);
  margin: 0 0 16px;
}
.tap-h1 {
  position: relative;
  font-size: clamp(38px, 7vw, 72px);
  line-height: 1.06;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
  color: var(--tap-text);
}
.tap-grad {
  background: linear-gradient(100deg, var(--tap-teal-deep) 10%, var(--tap-teal) 55%, var(--tap-amber) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tap-triad { position: relative; display: flex; gap: 11px; flex-wrap: wrap; justify-content: center; margin: 0 0 26px; }
.tap-triad span {
  padding: 6px 18px;
  border: 1px solid var(--tap-line);
  border-radius: 999px;
  background: var(--tap-teal-soft);
  font-weight: 700;
  font-size: 14px;
  color: var(--tap-teal-deep);
}
.tap-lede {
  position: relative;
  max-width: 740px;
  margin: 0 auto 34px;
  color: var(--tap-text-dim);
  font-size: 17px;
}
.tap-actions { position: relative; display: flex; gap: 13px; flex-wrap: wrap; justify-content: center; margin: 0; }

/* ---- Sections ---------------------------------------------------------------- */
.tap-section { padding: 88px 0; background: var(--tap-bg); }
.tap-section--tint { background: var(--tap-tint); }
.tap-h2 {
  font-size: clamp(27px, 4vw, 42px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.015em;
  margin: 0 0 16px;
  color: var(--tap-text);
}
.tap-section .tap-lede { margin: 0 0 42px; font-size: 16px; max-width: 740px; }
.tap-center { text-align: center; margin-top: 32px; }

/* ---- Continuum ----------------------------------------------------------------- */
.tap-continuum {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  border-radius: var(--tap-radius);
  overflow: hidden;
  border: 1px solid var(--tap-line);
  box-shadow: var(--tap-shadow);
  background: var(--tap-panel);
}
.tap-side { display: flex; flex-direction: column; gap: 10px; padding: 32px 29px; }
.tap-side--theirs { background: var(--tap-tint); color: var(--tap-text-dim); }
.tap-side--yours {
  background: linear-gradient(135deg, var(--tap-teal-deep), var(--tap-teal));
  text-align: right;
  color: #eafaf7;
}
.tap-side__label {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.8;
  margin-bottom: 6px;
}
.tap-item { font-weight: 700; font-size: 16px; }
.tap-item--hot { color: #ffffff; font-size: 20px; }
.tap-wall {
  position: relative;
  width: 3px;
  background: linear-gradient(180deg, transparent, var(--tap-teal), transparent);
  animation: tap-wall 3.5s ease-in-out infinite;
}
.tap-wall span {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-90deg);
  white-space: nowrap;
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--tap-teal);
  text-shadow: 0 0 14px rgba(0, 148, 133, 0.5);
}
@keyframes tap-wall {
  0%, 100% { box-shadow: 0 0 10px rgba(0, 148, 133, 0.35); }
  50% { box-shadow: 0 0 26px rgba(0, 148, 133, 0.8); }
}

/* ---- Cards & pillars & bridge ---------------------------------------------------- */
.tap-cards, .tap-pillars, .tap-bridge {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 19px;
}
.tap-card, .tap-pillar, .tap-bridge__card {
  position: relative;
  background: var(--tap-panel);
  border: 1px solid var(--tap-line);
  border-radius: var(--tap-radius);
  padding: 29px 24px;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.tap-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(380px 380px at var(--tap-mx, 50%) var(--tap-my, 50%),
              var(--tap-teal-soft), transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.tap-card:hover, .tap-bridge__card:hover {
  transform: translateY(-6px);
  border-color: var(--tap-teal);
  box-shadow: var(--tap-shadow);
}
.tap-card:hover::before { opacity: 1; }
.tap-card__n {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--tap-teal);
}
.tap-card h3, .tap-pillar h3 { margin: 8px 0; font-size: 18px; color: var(--tap-text); }
.tap-card p, .tap-pillar p, .tap-bridge__card p { margin: 0; font-size: 14px; color: var(--tap-text-dim); }

.tap-pillar { border-top: 3px solid var(--tap-teal); }
.tap-pillar__letter {
  position: absolute;
  right: 14px;
  top: 3px;
  font-size: 70px;
  font-weight: 800;
  color: var(--tap-teal-soft);
  line-height: 1;
  user-select: none;
}
.tap-pillar h3 { color: var(--tap-teal-deep); }

.tap-bridge__card { display: block; text-decoration: none; padding: 24px 22px; }
.tap-bridge__card h3 { margin: 0 0 7px; font-size: 17px; color: var(--tap-teal-deep); }
.tap-bridge__card h3 span { transition: transform 0.2s ease; display: inline-block; }
.tap-bridge__card:hover h3 span { transform: translateX(4px); }

.tap-cards .tap-reveal:nth-child(2), .tap-pillars .tap-reveal:nth-child(2), .tap-bridge .tap-reveal:nth-child(2) { transition-delay: 0.1s; }
.tap-cards .tap-reveal:nth-child(3), .tap-pillars .tap-reveal:nth-child(3), .tap-bridge .tap-reveal:nth-child(3) { transition-delay: 0.2s; }
.tap-cards .tap-reveal:nth-child(4), .tap-bridge .tap-reveal:nth-child(4) { transition-delay: 0.3s; }

/* ---- Marquee ------------------------------------------------------------------------ */
.tap-marquee {
  overflow: hidden;
  padding: 8px 0;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.tap-marquee__track {
  display: inline-flex;
  gap: 13px;
  white-space: nowrap;
  animation: tap-marquee 34s linear infinite;
  will-change: transform;
}
.tap-marquee:hover .tap-marquee__track { animation-play-state: paused; }
.tap-chip {
  padding: 8px 19px;
  border: 1px solid var(--tap-line);
  border-radius: 999px;
  background: var(--tap-panel);
  font-size: 14px;
  font-weight: 600;
  color: var(--tap-text);
}
@keyframes tap-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---- CTA ------------------------------------------------------------------------------ */
.tap-cta {
  text-align: center;
  padding: 104px 0;
  color: #ffffff;
  background:
    radial-gradient(1100px 560px at 50% 130%, rgba(255, 255, 255, 0.14), transparent 60%),
    linear-gradient(135deg, var(--tap-teal-deep), var(--tap-teal));
}
[data-md-color-scheme="slate"] .tap-landing .tap-cta {
  background:
    radial-gradient(1100px 560px at 50% 130%, rgba(255, 255, 255, 0.08), transparent 60%),
    linear-gradient(135deg, #00695f, #009485);
}
.tap-cta__title { font-size: clamp(32px, 5vw, 51px); font-weight: 800; margin: 0 0 13px; }
.tap-cta__title span { color: #ffe9c4; }
.tap-cta__signoff { color: rgba(255, 255, 255, 0.85); font-size: 17px; margin: 0 0 35px; }
.tap-cta__signoff strong { color: #ffe9c4; }

/* ---- Reduced motion & small screens ------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  .tap-landing *, .tap-landing *::before, .tap-landing *::after {
    animation: none !important;
    transition: none !important;
  }
  .tap-enter, .tap-reveal { opacity: 1; transform: none; }
}
@media (max-width: 700px) {
  .tap-hero { min-height: auto; padding: 72px 24px 52px; }
  .tap-continuum { grid-template-columns: 1fr; }
  .tap-wall { width: 100%; height: 3px;
    background: linear-gradient(90deg, transparent, var(--tap-teal), transparent); }
  .tap-wall span { transform: translate(-50%, -50%); }
  .tap-side--yours { text-align: left; }
}