/* Kestvi landing — palette from the app icon and in-app theme:
   ink #090A13, panel #12141F, card #1A1D30, keycap orange #EF6A2E / #FF9A62,
   deep orange #B43508, teal caret #50E3D0 / #007A73. System fonts only.
   Dark-first (the app's native look), light mode via prefers-color-scheme. */
:root {
  --ink: #090A13;
  --panel: #12141F;
  --card: #1A1D30;
  --orange: #EF6A2E;
  --orange-bright: #FF9A62;
  --orange-deep: #B43508;
  --teal: #50E3D0;
  --teal-deep: #007A73;
  --bg: #090A13;
  --bg-alt: #0E1019;
  --surface: #141625;
  --text: #F8F7FF;
  --muted: #BCBDCC;
  --line: #262A3D;
  --link: #FF9A62;
  --hero-text: #F8F7FF;
  --hero-muted: #BCBDCC;
  --kbd-bg: #232636;
  --ok: #50E3D0;
  --bad: #FF7A7A;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #F7F7FC;
    --bg-alt: #EEEFF8;
    --surface: #FFFFFF;
    --card: #FFFFFF;
    --text: #171724;
    --muted: #55586A;
    --line: #DDDDEA;
    --link: #B43A0A;
    --kbd-bg: #ECECF4;
    --ok: #007A73;
    --bad: #B42335;
    --shadow: 0 12px 32px rgba(23, 23, 36, 0.1);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-wrap: break-word;
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--link); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
  border-radius: 4px;
}
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--orange);
  color: #090A13;
  padding: 0.6rem 1rem;
  z-index: 100;
  font-weight: 700;
}
.skip-link:focus { left: 0; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 1.25rem; }

/* Header */
.site-head {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--ink) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
@media (prefers-color-scheme: light) {
  .site-head { background: color-mix(in srgb, #FFFFFF 92%, transparent); }
}
.site-head .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 60px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.brand img { border-radius: 8px; }
.nav-toggle {
  display: none;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem 0.9rem;
  font: inherit;
  cursor: pointer;
}
.site-nav ul {
  display: flex;
  gap: 1.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}
.site-nav a:hover { color: var(--orange-bright); }
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .site-nav { display: none; width: 100%; }
  .site-nav.open { display: block; padding-bottom: 0.75rem; }
  .site-head .wrap { flex-wrap: wrap; }
  .site-nav ul { flex-direction: column; gap: 0.6rem; }
}

/* Hero */
.hero {
  background:
    radial-gradient(1100px 480px at 85% -10%, rgba(239, 106, 46, 0.22), transparent 60%),
    radial-gradient(700px 420px at 0% 110%, rgba(80, 227, 208, 0.10), transparent 55%),
    var(--ink);
  color: var(--hero-text);
  border-bottom: 1px solid var(--line);
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
  padding-top: 4rem;
  padding-bottom: 4rem;
}
.kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  border: 1px solid rgba(80, 227, 208, 0.35);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  margin-bottom: 1.1rem;
}
.hero h1 {
  font-size: clamp(2rem, 4.6vw, 3.1rem);
  line-height: 1.12;
  margin: 0 0 1rem;
  letter-spacing: -0.015em;
}
.hero h1 em {
  font-style: normal;
  color: var(--orange-bright);
}
.lede {
  font-size: 1.13rem;
  color: var(--hero-muted);
  max-width: 34rem;
  margin: 0 0 1.5rem;
}
.badge-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.play-badge { display: inline-block; line-height: 0; border-radius: 10px; }
.launch-note {
  font-size: 0.85rem;
  color: var(--hero-muted);
  margin-top: 0.9rem;
}

/* Hero mock */
.phone-mock {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.25rem 1.25rem 1rem;
  box-shadow: var(--shadow);
  max-width: 330px;
  margin-left: auto;
}
@media (prefers-color-scheme: light) {
  .phone-mock { background: #12141F; }
}
.mock-stats { display: flex; gap: 0.5rem; margin-bottom: 0.9rem; }
.chip {
  background: #1A1D30;
  color: #BCBDCC;
  border: 1px solid #262A3D;
  border-radius: 999px;
  font-size: 0.75rem;
  padding: 0.25rem 0.7rem;
}
.chip strong { color: #FF9A62; font-size: 0.9rem; }
.chip.time strong { color: #50E3D0; }
.mock-text {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 0 0 0.9rem;
  color: #4A4E63;
}
.mock-text .ok { color: #F8F7FF; }
.mock-text .bad { color: #FF7A7A; text-decoration: underline wavy #FF7A7A 1px; }
.mock-text .cursor {
  color: #F8F7FF;
  border-left: 2px solid #50E3D0;
  animation: caret 1.1s steps(1) infinite;
}
.mock-text .rest { color: #4A4E63; }
@keyframes caret { 50% { border-color: transparent; } }
@media (prefers-reduced-motion: reduce) {
  .mock-text .cursor { animation: none; }
}
.mock-curve { position: relative; }
.mock-curve svg { display: block; width: 100%; height: 56px; }
.curve-label {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #6C7083;
  margin-top: 0.3rem;
}
@media (max-width: 840px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .phone-mock { margin: 0 auto; }
}

/* Sections */
section { padding: 3.5rem 0; }
section:nth-of-type(even) { background: var(--bg-alt); }
.section-head { max-width: 46rem; margin-bottom: 2rem; }
.section-head p { color: var(--muted); }
.tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 0.4rem;
}
.tag.alt { color: var(--teal); }
h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.2;
  margin: 0 0 0.75rem;
  letter-spacing: -0.01em;
}
h3 { font-size: 1.15rem; margin: 0 0 0.5rem; }

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  counter-reset: step;
}
.step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.5rem 1.4rem 1.25rem;
  counter-increment: step;
}
.step h3::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}
.step p { color: var(--muted); margin: 0; font-size: 0.97rem; }
@media (max-width: 760px) {
  .steps { grid-template-columns: 1fr; }
}

/* Modes dl — keycap rows */
.modes { margin: 0; display: grid; gap: 0.75rem; }
.mode-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  align-items: baseline;
}
.mode-row:nth-child(even) { border-left-color: var(--teal-deep); }
.mode-row dt { font-weight: 800; font-size: 1.02rem; }
.mode-row dd { margin: 0; color: var(--muted); font-size: 0.97rem; }
@media (max-width: 640px) {
  .mode-row { grid-template-columns: 1fr; gap: 0.25rem; }
}

/* Splits */
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
}
.split.rev .split-copy { order: 2; }
.split.rev .panel { order: 1; }
.split-copy ul { padding-left: 1.2rem; color: var(--muted); }
.split-copy li { margin-bottom: 0.55rem; font-size: 0.99rem; }
.split-copy strong { color: var(--text); }
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.4rem 1.5rem;
  box-shadow: var(--shadow);
}
@media (prefers-color-scheme: light) {
  .panel { background: #12141F; }
}
.score-line {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid #262A3D;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9rem;
  color: #BCBDCC;
}
.score-line:last-child { border-bottom: none; }
.score-line .win { color: #FF9A62; font-weight: 700; }
.score-line .keys { display: inline-flex; gap: 0.35rem; }
kbd {
  background: #232636;
  border: 1px solid #363A52;
  border-bottom-width: 3px;
  border-radius: 6px;
  padding: 0.05rem 0.5rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  color: #F8F7FF;
}
@media (max-width: 840px) {
  .split { grid-template-columns: 1fr; }
  .split.rev .split-copy { order: 1; }
  .split.rev .panel { order: 2; }
}

/* Versus / make-it-yours band */
.versus {
  background: linear-gradient(135deg, #12141F, #1A1D30);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 2.5rem 2.25rem;
  color: #F8F7FF;
}
.versus p { color: #BCBDCC; max-width: 44rem; }
.examples {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.75rem;
}
.examples li {
  background: rgba(239, 106, 46, 0.09);
  border: 1px solid rgba(239, 106, 46, 0.3);
  border-radius: 10px;
  padding: 0.7rem 1rem;
  font-weight: 700;
  font-size: 0.95rem;
}
.examples span { display: block; font-weight: 400; color: #BCBDCC; font-size: 0.85rem; }

/* Guides */
.guide-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.guide-list a {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.25rem 1.4rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
  transition: border-color 0.15s ease;
}
.guide-list a:hover { border-color: var(--orange); }
.guide-list small {
  display: block;
  color: var(--muted);
  font-weight: 400;
  font-size: 0.9rem;
  margin-top: 0.35rem;
}
@media (max-width: 700px) {
  .guide-list { grid-template-columns: 1fr; }
}

/* FAQ */
.faq { max-width: 46rem; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 0.75rem;
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 1rem 1.25rem;
  list-style: none;
  position: relative;
  padding-right: 2.75rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--orange);
  font-size: 1.35rem;
  font-weight: 400;
}
.faq details[open] summary::after { content: "–"; }
.faq details > div { padding: 0 1.25rem 1.1rem; color: var(--muted); }
.faq details > div p { margin: 0; }

/* CTA */
.cta-band {
  background:
    radial-gradient(800px 300px at 90% 0%, rgba(239, 106, 46, 0.25), transparent 60%),
    #12141F;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 2.75rem 2.25rem;
  text-align: center;
  color: #F8F7FF;
}
.cta-band p { color: #BCBDCC; margin: 0.25rem 0 1.5rem; }

/* Footer */
.site-foot {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 2rem;
  background: var(--bg-alt);
}
.site-foot .cols {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 1.75rem;
}
.site-foot h2 { font-size: 1rem; margin-bottom: 0.5rem; }
.site-foot p { color: var(--muted); font-size: 0.92rem; margin: 0; }
.site-foot ul { list-style: none; padding: 0; margin: 0; }
.site-foot li { margin-bottom: 0.4rem; }
.site-foot a { color: var(--muted); text-decoration: none; font-size: 0.92rem; }
.site-foot a:hover { color: var(--orange-bright); text-decoration: underline; }
.fine {
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
  font-size: 0.8rem !important;
  color: var(--muted);
}
@media (max-width: 700px) {
  .site-foot .cols { grid-template-columns: 1fr; gap: 1.25rem; }
}

/* Article pages */
.article-head {
  background:
    radial-gradient(900px 320px at 85% -20%, rgba(239, 106, 46, 0.18), transparent 60%),
    var(--ink);
  color: var(--hero-text);
  border-bottom: 1px solid var(--line);
  padding: 2.75rem 0 2.25rem;
}
.article-head h1 {
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  line-height: 1.18;
  margin: 0.5rem 0 0.6rem;
  letter-spacing: -0.01em;
}
.article-head .meta { color: var(--hero-muted); font-size: 0.9rem; margin: 0; }
.breadcrumb {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 0.85rem;
}
.breadcrumb li + li::before { content: "/"; margin-right: 0.35rem; color: var(--hero-muted); }
.breadcrumb a { color: var(--teal); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .here { color: var(--hero-muted); }
.article {
  max-width: 46rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 1rem;
}
.article p, .article li { font-size: 1.02rem; }
.article h2 { margin-top: 2.25rem; font-size: 1.45rem; }
.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}
.article th, .article td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--line);
}
.article th { color: var(--orange); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; }
.app-note {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  border-radius: 12px;
  padding: 1.4rem 1.5rem;
  margin-top: 2.5rem;
}
.app-note h2 { margin-top: 0; font-size: 1.2rem; }
.app-note p { margin-bottom: 0; color: var(--muted); }
.sibling-links {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}
.sibling-links h2 { font-size: 1.1rem; }
.sibling-links ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.sibling-links a { font-weight: 600; }