/* KairSun Web — /un-dia/ vende la MARCA: Kairós + Sun.
 *
 * Piezas: hero cinematográfico con aurora animada (solo transform/opacity),
 * lockup VERTICAL Kairós / + / Sun (color, badge e ícono cada uno), secciones
 * de concepto, misión y CTA a #waitlist. Cero JS.
 *
 * Ícono de Kairós: reloj de arena alado con chispa en el cuello, original de
 * KairSun-Web. Sun usa el ícono real de la app, solo referenciado.
 *
 * Reveal por scroll con animation-timeline: view() y fallback one-shot;
 * prefers-reduced-motion apaga todo. Reglas duras del repo: sin estilos
 * inline, contraste AA, foco visible, sin prioridad forzada.
 */

.ksk {
  --ksk-kairos: #2DD4BF;
  --ksk-kairos-soft: #7CE3FF;
  --ksk-sun: #F5C451;
  --ksk-sun-soft: #FFE9B8;
  --ksk-ink: #F8FAFC;
  --ksk-ink-2: #E2E8F0;
  --ksk-muted: #B8C4D6;
  --ksk-line: rgba(255, 255, 255, 0.14);
  --ksk-surface: rgba(255, 255, 255, 0.045);
  position: relative;
  display: grid;
  gap: clamp(34px, 6vw, 60px);
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(14px, 3vw, 26px) 0 48px;
  color: var(--ksk-ink);
}

.ksk a { color: var(--ksk-kairos-soft); }
.ksk a:hover { color: var(--ksk-sun-soft); }
.ksk :is(p, li) a:not(.btn) {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
.ksk :is(a, [tabindex]):focus-visible {
  outline: 2px solid var(--ksk-sun);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ── Hero: escenario con aurora animada (eficiente: compositor) ─────────── */

.ksk-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(26px, 6vw, 54px) clamp(18px, 5vw, 48px);
  border: 1px solid var(--ksk-line);
  border-radius: 28px;
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.015));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  text-align: center;
}

.ksk-aurora {
  position: absolute;
  inset: -32%;
  z-index: -1;
  pointer-events: none;
}

.ksk-aurora::before {
  content: "";
  position: absolute;
  inset: -14%;
  background: conic-gradient(
    from 210deg at 50% 50%,
    rgba(45, 212, 191, 0.26),
    rgba(45, 212, 191, 0) 28%,
    rgba(245, 196, 81, 0.22) 52%,
    rgba(245, 196, 81, 0) 78%,
    rgba(45, 212, 191, 0.26)
  );
  filter: blur(70px);
}

.ksk-aurora::after {
  content: "";
  position: absolute;
  inset: 12% 16%;
  background:
    radial-gradient(46% 42% at 30% 32%, rgba(124, 227, 255, 0.2), transparent 70%),
    radial-gradient(44% 40% at 72% 68%, rgba(255, 215, 119, 0.18), transparent 72%);
  filter: blur(46px);
}

@keyframes ksk-spin { to { transform: rotate(1turn); } }
@keyframes ksk-breathe {
  from { opacity: 0.72; transform: scale(1); }
  to { opacity: 1; transform: scale(1.08); }
}

@media (prefers-reduced-motion: no-preference) {
  .ksk-aurora::before { animation: ksk-spin 64s linear infinite; }
  .ksk-aurora::after { animation: ksk-breathe 12s ease-in-out infinite alternate; }
}

.ksk-hero__lead {
  max-width: 56ch;
  margin: 0 auto 26px;
  color: var(--ksk-ink-2);
  font-size: clamp(1.02rem, 2.4vw, 1.16rem);
  text-wrap: pretty;
}

.ksk-h1 {
  font-family: var(--display);
  font-size: clamp(1.9rem, 5.8vw, 2.9rem);
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin: 20px 0 14px;
  text-wrap: balance;
}

.ksk-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.ksk-note {
  margin: 16px 0 0;
  color: var(--ksk-muted);
  font-size: 0.88rem;
}

/* ── Lockup vertical: Kairós / + / Sun ──────────────────────────────────── */

.ksk-lockup {
  display: grid;
  justify-items: center;
  width: 100%;
  max-width: 470px;
  margin: 0 auto;
}

.ksk-node {
  --ksk-accent: var(--ksk-kairos);
  --ksk-accent-soft: var(--ksk-kairos-soft);
  display: grid;
  justify-items: center;
  gap: 12px;
  width: 100%;
  padding: 6px 8px 2px;
}

.ksk-node--sun {
  --ksk-accent: var(--ksk-sun);
  --ksk-accent-soft: var(--ksk-sun-soft);
}

.ksk-node__icon {
  position: relative;
  display: grid;
  place-items: center;
  width: clamp(100px, 27vw, 136px);
  aspect-ratio: 1;
}

.ksk-node__icon::before {
  content: "";
  position: absolute;
  inset: 5%;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--ksk-accent) 32%, transparent), transparent 70%);
  filter: blur(14px);
}

.ksk-node__icon img {
  position: relative;
  width: 100%;
  height: 100%;
}

/* El trazo del reloj pesa ópticamente menos que el disco de Sun: se agranda
   un 10% para que las dos mitades del lockup se lean parejas. */
.ksk-node--kairos .ksk-node__icon img { width: 110%; height: 110%; }

.ksk-node__word {
  font-family: var(--display);
  font-size: clamp(1.9rem, 7vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--ksk-accent-soft);
}

.ksk-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--ksk-accent) 45%, transparent);
  background: color-mix(in srgb, var(--ksk-accent) 12%, transparent);
  color: var(--ksk-accent-soft);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.ksk-join {
  display: grid;
  justify-items: center;
}

.ksk-join__line {
  width: 2px;
  height: clamp(16px, 4vw, 30px);
}

.ksk-join__line--a {
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--ksk-kairos) 75%, transparent));
}

.ksk-join__line--b {
  background: linear-gradient(180deg, color-mix(in srgb, var(--ksk-sun) 75%, transparent), transparent);
}

.ksk-plus {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  font-family: var(--font);
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1;
  color: var(--ksk-ink);
  border: 1px solid color-mix(in srgb, var(--ksk-sun) 52%, var(--ksk-kairos));
  background:
    linear-gradient(140deg, color-mix(in srgb, var(--ksk-kairos) 26%, #0B1220), color-mix(in srgb, var(--ksk-sun) 24%, #0B1220));
  box-shadow:
    0 0 0 6px rgba(45, 212, 191, 0.06),
    0 10px 24px rgba(0, 0, 0, 0.35);
  transition: transform 0.45s cubic-bezier(0.2, 0.85, 0.25, 1), box-shadow 0.45s ease;
}

@media (prefers-reduced-motion: no-preference) {
  .ksk-lockup:hover .ksk-plus {
    transform: rotate(90deg) scale(1.05);
    box-shadow:
      0 0 0 8px rgba(245, 196, 81, 0.1),
      0 12px 28px rgba(0, 0, 0, 0.4);
  }
}

.ksk-wordmark {
  margin-top: 18px;
  font-family: var(--display);
  font-size: clamp(2.1rem, 8vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--ksk-sun-soft);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .ksk-wordmark {
    background: linear-gradient(100deg, var(--ksk-kairos-soft), #FFFFFF 38%, var(--ksk-sun-soft) 72%, var(--ksk-sun));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }
}

.ksk-tagline {
  margin: 10px 0 0;
  color: var(--ksk-muted);
  letter-spacing: 0.02em;
}

/* ── Secciones de concepto ──────────────────────────────────────────────── */

.ksk-section {
  display: grid;
  gap: 14px;
}

.ksk-kicker {
  margin: 0;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ksk-muted);
}

.ksk-h2 {
  font-family: var(--display);
  font-size: clamp(1.45rem, 4.6vw, 2.05rem);
  line-height: 1.15;
  margin: 0;
  text-wrap: balance;
}

.ksk-lead,
.ksk-p {
  margin: 0;
  max-width: 68ch;
  color: var(--ksk-ink-2);
  text-wrap: pretty;
}

.ksk-card {
  --ksk-accent: var(--ksk-kairos);
  --ksk-accent-soft: var(--ksk-kairos-soft);
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 18px;
  padding: clamp(18px, 4vw, 28px);
  border: 1px solid color-mix(in srgb, var(--ksk-accent) 34%, var(--ksk-line));
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.32);
}

.ksk-card--sun {
  --ksk-accent: var(--ksk-sun);
  --ksk-accent-soft: var(--ksk-sun-soft);
}

.ksk-card__head {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 20px);
}

.ksk-card__icon {
  flex: none;
  display: grid;
  place-items: center;
  width: clamp(64px, 18vw, 92px);
  aspect-ratio: 1;
  border-radius: 22px;
  border: 1px solid color-mix(in srgb, var(--ksk-accent) 42%, transparent);
  background: color-mix(in srgb, var(--ksk-accent) 12%, transparent);
}

.ksk-card__icon img { width: 86%; height: 86%; }
.ksk-card--kairos .ksk-card__icon img { width: 100%; height: 100%; }

.ksk-card__title {
  margin: 0 0 4px;
  font-family: var(--display);
  font-size: clamp(1.15rem, 3.4vw, 1.4rem);
}

.ksk-card__sub {
  margin: 0;
  color: var(--ksk-muted);
  font-size: 0.92rem;
}

.ksk-meanings {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.ksk-meanings li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  color: var(--ksk-ink-2);
}

.ksk-meanings strong { color: var(--ksk-ink); }

.ksk-dot {
  width: 12px;
  height: 12px;
  margin-top: 0.45em;
  border-radius: 50%;
  background: var(--ksk-accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--ksk-accent) 20%, transparent);
}

.ksk-chips {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.ksk-chips li {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--ksk-line);
  background: var(--ksk-surface);
  color: var(--ksk-ink-2);
  font-size: 0.88rem;
}

.ksk-chips strong { color: var(--ksk-accent-soft); }

.ksk-source {
  margin: 0;
  color: var(--ksk-muted);
  font-size: 0.82rem;
}

/* Misión: tres piezas */
.ksk-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.ksk-mini {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 18px;
  border: 1px solid var(--ksk-line);
  border-radius: 18px;
  background: var(--ksk-surface);
}

.ksk-mini__mark {
  width: 30px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--ksk-kairos), var(--ksk-sun));
}

.ksk-mini h3 {
  margin: 0;
  font-size: 1.02rem;
}

.ksk-mini p {
  margin: 0;
  color: var(--ksk-muted);
  font-size: 0.92rem;
}

/* ── CTA final ──────────────────────────────────────────────────────────── */

.ksk-cta {
  display: grid;
  justify-items: center;
  gap: 14px;
  text-align: center;
  padding: clamp(28px, 6vw, 48px) clamp(20px, 5vw, 40px);
  border: 1px solid color-mix(in srgb, var(--ksk-sun) 34%, var(--ksk-line));
  border-radius: 26px;
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(245, 196, 81, 0.14), transparent 62%),
    linear-gradient(160deg, rgba(45, 212, 191, 0.1), rgba(255, 255, 255, 0.02));
  box-shadow: 0 26px 70px rgba(0, 0, 0, 0.4);
}

.ksk-cta h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.4rem, 4.4vw, 1.9rem);
}

.ksk-cta p {
  margin: 0;
  max-width: 52ch;
  color: var(--ksk-ink-2);
}

/* ── Reveal por scroll (view()) + fallback; reduced-motion apaga ────────── */

@keyframes ksk-rise {
  from { opacity: 0.9; transform: translateY(18px); filter: blur(0.6px); }
  to { opacity: 1; transform: none; filter: none; }
}

@keyframes ksk-in {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

@keyframes ksk-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .ksk-reveal {
      animation: ksk-rise linear both;
      animation-timeline: view();
      animation-range: entry 0% cover 26%;
    }
    .ksk-section > .ksk-reveal:nth-child(2) { animation-range: entry 5% cover 30%; }
    .ksk-section > .ksk-reveal:nth-child(3) { animation-range: entry 10% cover 34%; }
    .ksk-card, .ksk-cta {
      animation: ksk-rise linear both;
      animation-timeline: view();
      animation-range: entry 0% cover 32%;
    }
  }
}

@supports not (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .ksk-reveal, .ksk-card, .ksk-cta {
      animation: ksk-rise 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) both;
    }
  }
}

@media (prefers-reduced-motion: no-preference) {
  .ksk-hero .ksk-node--kairos { animation: ksk-in 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) both; }
  .ksk-hero .ksk-join { animation: ksk-in 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) 0.1s both; }
  .ksk-hero .ksk-node--sun { animation: ksk-in 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) 0.18s both; }
  .ksk-hero .ksk-wordmark { animation: ksk-in 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) 0.26s both; }
  .ksk-hero .ksk-tagline { animation: ksk-in 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) 0.32s both; }
  .ksk-hero .ksk-h1,
  .ksk-hero .ksk-hero__lead,
  .ksk-hero .ksk-cta-row,
  .ksk-hero .ksk-note { animation: ksk-in 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) 0.38s both; }
  .ksk-hero .ksk-hero__lead { animation-delay: 0.44s; }
  .ksk-hero .ksk-cta-row { animation-delay: 0.5s; }
  .ksk-hero .ksk-note { animation-delay: 0.56s; }

  .ksk-node__icon img { animation: ksk-float 7s ease-in-out infinite; }
  .ksk-node--sun .ksk-node__icon img { animation-duration: 9s; animation-delay: -3s; }
}

/* ── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 720px) {
  .ksk-grid { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .ksk-hero { border-radius: 22px; }
  .ksk-cta-row { flex-direction: column; }
  .ksk-cta-row .btn { width: 100%; }
  .ksk-card__head { align-items: flex-start; }
}

@media (min-width: 1000px) {
  .ksk-node__icon { width: 150px; }
}