/* inCore20 landing — system fonts, no remote webfonts. */
:root {
  --i20-ink: #10243f;
  --i20-ink-soft: #3b516c;
  --i20-paper: #f6f3ec;
  --i20-card: #fffdf8;
  --i20-line: rgba(16, 36, 63, 0.12);
  --i20-accent: #c45c26;
  --i20-accent-2: #1f6f8b;
  --i20-wa: #128c7e;
  --i20-max: 1080px;
  --i20-radius: 20px;
  --sticky-h: 4.5rem;
}

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

html { scroll-behavior: smooth; }

.i20-html,
.i20-body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at 12% 0%, rgba(31, 111, 139, 0.08), transparent 36%),
    radial-gradient(circle at 90% 8%, rgba(196, 92, 38, 0.08), transparent 28%),
    var(--i20-paper);
  color: var(--i20-ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.55;
}

.i20-skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.i20-skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 20;
  background: #fff;
  padding: 0.4rem 0.7rem;
}

.i20-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.i20-wrap {
  width: min(var(--i20-max), calc(100% - 2rem));
  margin-inline: auto;
}

.i20-nav {
  border-bottom: 1px solid var(--i20-line);
  background: rgba(246, 243, 236, 0.92);
  backdrop-filter: blur(8px);
}
.i20-nav-inner {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  min-height: 4rem;
}
.i20-brand {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}
.i20-brand span { color: var(--i20-accent); }
.i20-brand-sub {
  margin: 0;
  color: var(--i20-ink-soft);
  font-size: 0.95rem;
}

.i20-hero { padding: 3.5rem 0 2rem; }
.i20-kicker {
  margin: 0 0 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--i20-accent-2);
  font-family: "Avenir Next", "Segoe UI", sans-serif;
}
.i20-hello {
  margin: 0 0 0.6rem;
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  min-height: 2.4rem;
}
.i20-hero h1,
.i20-block h2,
.i20-close h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4.4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 18ch;
}
.i20-lead,
.i20-promise {
  max-width: 42rem;
  color: var(--i20-ink-soft);
}
.i20-promise {
  font-weight: 600;
  color: var(--i20-ink);
}

.i20-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.6rem 0 0.7rem;
}
.i20-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  text-decoration: none;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  font-size: 0.95rem;
}
.i20-btn:focus-visible {
  outline: 3px solid var(--i20-accent-2);
  outline-offset: 3px;
}
.i20-btn-primary {
  background: var(--i20-ink);
  color: #fff;
}
.i20-btn-ghost {
  background: transparent;
  color: var(--i20-ink);
  box-shadow: inset 0 0 0 1px var(--i20-ink);
}
.i20-micro {
  color: var(--i20-ink-soft);
  font-size: 0.92rem;
}

.i20-visual { padding-bottom: 1rem; }
.i20-stage {
  position: relative;
  min-height: 280px;
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 1rem;
  align-items: end;
}
.i20-desktop,
.i20-phone {
  background: var(--i20-card);
  border: 1px solid var(--i20-line);
  box-shadow: 0 18px 40px rgba(16, 36, 63, 0.08);
}
.i20-desktop { border-radius: 16px; overflow: hidden; }
.i20-desktop-bar {
  display: flex;
  gap: 0.35rem;
  padding: 0.7rem 0.9rem;
  background: #e8e2d6;
}
.i20-desktop-bar span {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: #c9c0b2;
}
.i20-desktop-body {
  display: grid;
  grid-template-columns: 72px 1fr;
  min-height: 210px;
}
.i20-desk-col { background: #10243f; }
.i20-desk-main { padding: 1.2rem; }
.i20-desk-line {
  height: 10px;
  width: 46%;
  background: #d9d1c3;
  border-radius: 99px;
  margin-bottom: 0.6rem;
}
.i20-desk-line.i20-wide { width: 72%; }
.i20-desk-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-top: 1.2rem;
}
.i20-desk-cards span {
  height: 64px;
  border-radius: 10px;
  background: #efe8db;
}
.i20-phone {
  border-radius: 28px;
  padding: 1.1rem 1rem 1.3rem;
  min-height: 240px;
}
.i20-phone-name {
  margin: 0 0 0.8rem;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  font-size: 0.85rem;
}
.i20-bubble {
  margin: 0 0 0.55rem;
  padding: 0.7rem 0.8rem;
  border-radius: 14px 14px 14px 4px;
  background: #efe8db;
  font-size: 0.92rem;
}
.i20-bubble-ai {
  background: #12324a;
  color: #f6f3ec;
  border-radius: 14px 14px 4px 14px;
}
.i20-caption {
  margin: 0.7rem 0 0;
  font-size: 0.85rem;
  color: var(--i20-ink-soft);
}

.i20-block { padding: 3rem 0; }
.i20-cards,
.i20-steps,
.i20-questions {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}
.i20-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.i20-cards li,
.i20-cards article,
.i20-steps li {
  background: var(--i20-card);
  border: 1px solid var(--i20-line);
  border-radius: var(--i20-radius);
  padding: 1.2rem 1.25rem;
}
.i20-cards h3,
.i20-steps h3 { margin: 0 0 0.45rem; font-size: 1.15rem; }
.i20-cards p,
.i20-steps p { margin: 0; color: var(--i20-ink-soft); }
.i20-cards-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.i20-steps { display: grid; gap: 0.8rem; }
.i20-questions li {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--i20-line);
  font-size: 1.05rem;
}

details {
  border-top: 1px solid var(--i20-line);
  padding: 0.9rem 0;
}
details:last-child { border-bottom: 1px solid var(--i20-line); }
summary {
  cursor: pointer;
  font-weight: 600;
}
summary:focus-visible {
  outline: 3px solid var(--i20-accent-2);
  outline-offset: 3px;
}
details p { color: var(--i20-ink-soft); }

.i20-close { padding-bottom: 6rem; }
.i20-footer {
  border-top: 1px solid var(--i20-line);
  padding: 1.4rem 0 6rem;
  color: var(--i20-ink-soft);
  font-size: 0.92rem;
}

.i20-sticky {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
  padding: 0.7rem 1rem calc(0.7rem + env(safe-area-inset-bottom));
  background: rgba(246, 243, 236, 0.96);
  border-top: 1px solid var(--i20-line);
  z-index: 10;
}
.i20-sticky .i20-btn { width: 100%; }

@media (max-width: 800px) {
  .i20-hero { padding-top: 2.2rem; }
  .i20-hero h1 { max-width: none; }
  .i20-stage { grid-template-columns: 1fr; }
  .i20-cards,
  .i20-cards-3 { grid-template-columns: 1fr; }
  .i20-sticky { display: block; }
  .i20-body { padding-bottom: var(--sticky-h); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}