/* ==========================================================================
   KIO LANDING — V3 (RESPONSIVE)
   Design System + Animaciones + Estilo editorial moderno
   ========================================================================== */

/* ──────────────────────────────────────────────────────────────────────────
   1) CUSTOM PROPERTIES (Kio DS)
   ────────────────────────────────────────────────────────────────────────── */
:root {
  /* Primitivos */
  --kio-black: #000000;
  --kio-white: #FFFFFF;
  --kio-gray-dark: #1A1A1A;
  --kio-gray-neutral: #737373;
  --kio-gray-light: #D4D4D4;
  --kio-red: #DC2626;
  --kio-green: #16A34A;

  /* Semánticos */
  --kio-bg-primary: var(--kio-white);
  --kio-bg-inverse: var(--kio-black);
  --kio-bg-subtle: #F5F5F5;

  --kio-text-primary: var(--kio-black);
  --kio-text-secondary: var(--kio-gray-dark);
  --kio-text-muted: var(--kio-gray-neutral);
  --kio-text-inverse: var(--kio-white);

  --kio-border-default: var(--kio-gray-light);
  --kio-border-strong: var(--kio-gray-neutral);

  --kio-interactive-default: var(--kio-black);
  --kio-interactive-hover: var(--kio-gray-dark);
  --kio-interactive-inverse: var(--kio-white);

  --kio-feedback-error: var(--kio-red);
  --kio-feedback-success: var(--kio-green);

  /* Spacing */
  --kio-space-xs: 4px;
  --kio-space-sm: 8px;
  --kio-space-md: 16px;
  --kio-space-lg: 24px;
  --kio-space-xl: 32px;
  --kio-space-2xl: 48px;
  --kio-space-3xl: 64px;
  --kio-space-4xl: 96px;
  --kio-space-5xl: 128px;

  /* Radius */
  --kio-radius-sm: 4px;
  --kio-radius-md: 8px;
  --kio-radius-lg: 12px;
  --kio-radius-xl: 16px;
  --kio-radius-full: 9999px;

  /* Animation */
  --kio-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --kio-ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --kio-duration-fast: 200ms;
  --kio-duration-normal: 400ms;
  --kio-duration-slow: 700ms;

  /* Escala continua de la lamparita: 1 = tamaño de referencia a 1600px de ancho.
     Achica proporcionalmente hasta 0.4 en pantallas chicas, crece hasta 1.25 en 4K. */
  --lamp-scale: clamp(0.4, calc(100vw / 1600), 1.25);
}

/* ──────────────────────────────────────────────────────────────────────────
   2) RESET & BASE
   ────────────────────────────────────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Jost', sans-serif;
  color: var(--kio-text-primary);
  background: var(--kio-bg-primary);
  line-height: 1.5;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ──────────────────────────────────────────────────────────────────────────
   3) TYPOGRAPHY (Kio DS)
   ────────────────────────────────────────────────────────────────────────── */
.kio-h1 {
  font-family: 'Jost', sans-serif;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 0.95;
  font-weight: 600;
  letter-spacing: -0.04em;
  font-style: italic;
}

.kio-h2 {
  font-family: 'Jost', sans-serif;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.05;
  font-weight: 200;
  letter-spacing: -0.04em;
  font-style: italic;
}

.kio-h3 {
  font-family: 'Jost', sans-serif;
  font-size: clamp(28px, 3.5vw, 40px);
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.03em;
  font-style: italic;
}

.kio-body {
  font-family: 'Jost', sans-serif;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.kio-body-lg {
  font-family: 'Jost', sans-serif;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.4;
  font-weight: 300;
  letter-spacing: -0.01em;
}

.kio-detail {
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ──────────────────────────────────────────────────────────────────────────
   4) BUTTONS (Kio DS)
   ────────────────────────────────────────────────────────────────────────── */
.kio-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--kio-space-sm);
  font-family: 'Jost', sans-serif;
  font-size: 16px;
  font-weight: 600;
  font-style: italic;
  letter-spacing: -0.02em;
  padding: 12px 32px;
  border-radius: var(--kio-radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--kio-duration-fast) var(--kio-ease-out);
  position: relative;
  overflow: hidden;
}

.kio-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--kio-duration-fast) var(--kio-ease-out);
}

.kio-btn:hover::after {
  opacity: 1;
}

.kio-btn:hover {
  transform: scale(1.02);
}

.kio-btn:active {
  transform: scale(0.98);
}

.kio-btn-dark {
  background: var(--kio-black);
  color: var(--kio-white);
}

.kio-btn-dark:hover {
  background: var(--kio-gray-dark);
}

.kio-btn-light {
  background: var(--kio-white);
  color: var(--kio-black);
}

.kio-btn-light:hover {
  background: var(--kio-gray-light);
}

.kio-btn-outline {
  background: transparent;
  border: 1.5px solid currentColor;
  color: inherit;
}

.kio-btn-outline:hover {
  background: var(--kio-black);
  color: var(--kio-white);
  border-color: var(--kio-black);
}

/* ──────────────────────────────────────────────────────────────────────────
   BETA SIGNUP FORM
   ────────────────────────────────────────────────────────────────────────── */
.beta-form-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--kio-space-md);
  width: 100%;
  margin-top: var(--kio-space-xl);
}

.beta-form {
  display: flex;
  gap: var(--kio-space-sm);
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  max-width: 480px;
}

.beta-input {
  flex: 1;
  min-width: 220px;
  font-family: 'Jost', sans-serif;
  font-size: 16px;
  font-weight: 400;
  padding: 12px 20px;
  border-radius: var(--kio-radius-md);
  border: 1.5px solid var(--kio-gray-neutral);
  background: transparent;
  color: var(--kio-white);
  transition: border-color var(--kio-duration-fast) var(--kio-ease-out);
}

.beta-input::placeholder {
  color: var(--kio-gray-neutral);
}

.beta-input:focus {
  outline: none;
  border-color: var(--kio-white);
}

.beta-input:invalid:not(:placeholder-shown) {
  border-color: var(--kio-red);
}

.beta-submit {
  white-space: nowrap;
}

.beta-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.beta-message {
  font-family: 'Jost', sans-serif;
  font-size: 14px;
  font-weight: 400;
  min-height: 20px;
  text-align: center;
}

.beta-message.success {
  color: #4ADE80; 
}

.beta-message.error {
  color: #F87171; 
}


.bg-white .beta-input,
.cta-final .beta-input {
  color: var(--kio-black);
  border-color: var(--kio-border-strong);
}

.bg-white .beta-input::placeholder,
.cta-final .beta-input::placeholder {
  color: var(--kio-gray-neutral);
}

/* ──────────────────────────────────────────────────────────────────────────
   5) SECTIONS & SCROLL-SNAP
   ────────────────────────────────────────────────────────────────────────── */
section {
  min-height: 100vh;
  min-height: 100dvh;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--kio-space-3xl) var(--kio-space-xl);
  position: relative;
  overflow: hidden;
}

section.bg-white {
  background: var(--kio-white);
  color: var(--kio-black);
}

section.bg-black {
  background: var(--kio-black);
  color: var(--kio-white);
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
}

.container-narrow {
  max-width: 720px;
  text-align: center;
}

.container-que-es {
  max-width: 1440px;
  text-align: center;
  position: relative;
}

/* ──────────────────────────────────────────────────────────────────────────
   6) HERO
   ────────────────────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--kio-space-3xl) var(--kio-space-xl);
  position: relative;
  overflow: hidden;
  background: var(--kio-black);
  color: var(--kio-white);
  transition: background 1.2s var(--kio-ease-in-out);
}

.hero.room-lit {
  background: var(--kio-white);
  color: var(--kio-black);
}

/* Lamparita SVG colgando del techo — sticky toda la landing.
   El tamaño se controla con --lamp-scale (ver sección 1), así que
   escala de forma continua y proporcional en cualquier resolución. */
.lamp-hanger {
  position: fixed;
  top: 0;
  left: 50%;
  margin-left: -70px; /* mitad del ancho (140px / 2): centra sin depender del scale */
  width: 140px;
  height: 340px;
  overflow: visible;
  z-index: 1000;
  transform-origin: top center;
  transform: scale(var(--lamp-scale));
  cursor: pointer;
  pointer-events: auto;
}

@keyframes lamp-swing {
  0%   { transform: scale(var(--lamp-scale)) rotate(0deg); }
  15%  { transform: scale(var(--lamp-scale)) rotate(-8deg); }
  40%  { transform: scale(var(--lamp-scale)) rotate(5deg); }
  65%  { transform: scale(var(--lamp-scale)) rotate(-3deg); }
  85%  { transform: scale(var(--lamp-scale)) rotate(1deg); }
  100% { transform: scale(var(--lamp-scale)) rotate(0deg); }
}

.lamp-hanger.lamp-swing {
  animation: lamp-swing 1.2s ease-out forwards;
}

.lamp-img {
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%) scale(0.7);
  transform-origin: top center;
  width: 100px;
  height: auto;
  display: block;
  opacity: 0;
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.lamp-on {
  opacity: 0;
}

.lamp-off {
  opacity: 0;
  filter: brightness(0.2) grayscale(1);
}

.lamp-hanger.lamp-shrink .lamp-img {
  transform: translateX(-50%) scale(0.56);
}

.lamp-hanger.lamp-shrink .lamp-glow {
  top: 85px;
  width: 60px;
  height: 60px;
}

/* Cool white glow from the bulb only — positioned over the lightbulb */
.lamp-glow {
  position: absolute;
  top: 136px;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.15);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.3) 30%, transparent 55%);
  opacity: 0;
  pointer-events: none;
}

.js .hero-content {
  opacity: 0;
  transform: translateY(20px);
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  transition: opacity 1s var(--kio-ease-out), transform 1s var(--kio-ease-out);
}

.hero-content.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--kio-space-lg);
}

/* Letras Kio desde Figma (oscuro sobre transparente) */
.kio-letters {
  display: block;
  width: min(380px, 70vw);
  height: auto;
  margin-bottom: var(--kio-space-md);
  filter: invert(1);
  transition: filter 1.2s var(--kio-ease-in-out);
}

/* When room lights up, remove invert — dark letters on white bg */
.hero.room-lit .kio-letters {
  filter: invert(0);
}

.hero-text .kio-tagline {
  font-family: 'Jost', sans-serif;
  font-size: clamp(22px, 2.8vw, 32px);
  line-height: 1.35;
  font-weight: 300;
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--kio-gray-light);
  max-width: 480px;
  transition: color 1.2s var(--kio-ease-in-out), opacity 1s var(--kio-ease-out), transform 1s var(--kio-ease-out);
  opacity: 0;
  transform: translateY(10px);
}

.hero-content.visible .hero-text .kio-tagline {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 1s;
}

.hero.room-lit .hero-text .kio-tagline {
  color: var(--kio-gray-neutral);
}

.hero-cta {
  margin-top: var(--kio-space-md);
}

/* ──────────────────────────────────────────────────────────────────────────
   7) SECTION STYLES
   ────────────────────────────────────────────────────────────────────────── */
.section-label {
  font-family: 'Jost', sans-serif;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--kio-gray-neutral);
  margin-bottom: var(--kio-space-md);
}

.section-title {
  margin-bottom: var(--kio-space-lg);
}

.section-text {
  color: var(--kio-gray-neutral);
  max-width: 600px;
  margin: 0 auto var(--kio-space-md);
}

.bg-black .section-text {
  color: var(--kio-gray-light);
}

.bg-black .section-label {
  color: var(--kio-gray-neutral);
}

/* ¿Kio? title + texto (antes estaban con estilos inline en el HTML) */
.section-kio-title {
  font-family: 'Jost', sans-serif;
  font-size: clamp(48px, 6vw, 64px);
  font-weight: 300;
  font-style: italic;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--kio-white);
}

.que-es-title {
  text-align: center;
  margin-bottom: var(--kio-space-sm);
}

.que-es-text {
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
  color: var(--kio-gray-light);
  font-size: 20px;
  text-align: center;
  line-height: 1.6;
}

.construccion-text {
  color: var(--kio-gray-light);
}

/* Feature cards grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--kio-space-xl);
  max-width: 1188px;
  margin: var(--kio-space-3xl) auto 0;
}

.feature-card {
  position: relative;
  background: rgba(255,255,255,0.07);
  border-radius: var(--kio-radius-lg);
  padding: var(--kio-space-lg);
  overflow: hidden;
  transition: background 0.3s var(--kio-ease-out);
}

/* Top edge reflection — matches Figma export gradient */
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(
    to bottom,
    rgba(255,255,255,0.16) 0%,
    rgba(255,255,255,0.06) 40%,
    transparent 100%
  );
  border-radius: var(--kio-radius-lg) var(--kio-radius-lg) 0 0;
  pointer-events: none;
  transition: opacity 0.3s var(--kio-ease-out);
}

.feature-card:hover {
  background: rgba(255,255,255,0.10);
}

.feature-card:hover::before {
  opacity: 0.7;
}

.feature-card h3 {
  font-family: 'Jost', sans-serif;
  font-size: 16px;
  font-weight: 500;
  color: var(--kio-white);
  margin-bottom: var(--kio-space-sm);
}

.feature-card p {
  font-family: 'Jost', sans-serif;
  font-size: 14px;
  font-weight: 300;
  line-height: 1.4;
  color: var(--kio-gray-neutral);
}

/* Split layout (text + phone) */
.split-layout {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--kio-space-2xl);
  max-width: 1100px;
}

.split-text {
  flex: 1;
  text-align: center;
}

.split-quote {
  font-family: 'Jost', sans-serif;
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 300;
  font-style: italic;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--kio-gray-dark);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.split-phones {
  flex-shrink: 0;
}

.split-phone {
  width: 240px;
  flex-shrink: 0;
  transition: transform 1.2s var(--kio-ease-out), opacity 1.2s var(--kio-ease-out);
}

.split-phone img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.15));
}

.phone-maker {
  transform: translateX(-120%) rotate(-6deg);
  opacity: 0;
}

.phone-lector {
  transform: translateX(120%) rotate(6deg);
  opacity: 0;
}

.split-phones.visible .phone-maker,
.split-phones.visible .phone-lector {
  transform: translateX(0) rotate(0deg);
  opacity: 1;
}

.bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--kio-space-md);
  max-width: 500px;
  margin: var(--kio-space-xl) auto 0;
  text-align: left;
}

.bullets li {
  display: flex;
  align-items: flex-start;
  gap: var(--kio-space-md);
  font-family: 'Jost', sans-serif;
  font-size: clamp(15px, 1.8vw, 18px);
  line-height: 1.4;
  font-weight: 300;
}

.bullets li::before {
  content: '—';
  font-weight: 600;
  font-style: italic;
  flex-shrink: 0;
  color: var(--kio-gray-neutral);
}

.bg-black .bullets li {
  color: var(--kio-gray-light);
}

/* Timeline (versión horizontal — desktop/tablet ancho) */
.timeline {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: var(--kio-space-xl);
  margin: var(--kio-space-2xl) 0;
  flex-wrap: wrap;
}

/* Solid connecting line — spans first 60% */
.timeline::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 0;
  height: 1px;
  width: 55%;
  background: var(--kio-gray-neutral);
  z-index: 0;
}

/* Dashed line — last 40%, covers julio→lanzamiento */
.timeline::after {
  content: '';
  position: absolute;
  top: 6px;
  right: 0;
  height: 1px;
  width: 45%;
  background: repeating-linear-gradient(
    to right,
    var(--kio-gray-neutral) 0px,
    var(--kio-gray-neutral) 4px,
    transparent 4px,
    transparent 8px
  );
  z-index: 0;
}

.timeline-item {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--kio-space-sm);
  font-family: 'Jost', sans-serif;
  z-index: 1;
}

.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--kio-gray-light);
  transition: background var(--kio-duration-normal) var(--kio-ease-out);
}

.timeline-item.visible .timeline-dot {
  background: var(--kio-black);
}

.bg-black .timeline-item.visible .timeline-dot {
  background: var(--kio-white);
}

.timeline-future .timeline-dot {
  background: transparent;
  border: 1.5px dashed var(--kio-gray-neutral);
}

.timeline-future.visible .timeline-dot {
  border-color: var(--kio-black);
}

.bg-black .timeline-future.visible .timeline-dot {
  border-color: var(--kio-white);
}

.timeline-label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--kio-gray-neutral);
  text-align: center;
}

/* ──────────────────────────────────────────────────────────────────────────
   8) CTA FINAL
   ────────────────────────────────────────────────────────────────────────── */
.cta-final {
  min-height: 100vh;
  min-height: 100dvh;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--kio-space-3xl) var(--kio-space-xl);
  position: relative;
  overflow: hidden;
  background: var(--kio-white);
  color: var(--kio-black);
}

.cta-final .section-text {
  color: var(--kio-gray-neutral);
}

.cta-btn-wrap {
  margin-top: var(--kio-space-xl);
}

/* Footer */
.footer {
  margin-top: var(--kio-space-4xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--kio-space-md);
}

.footer-logo {
  font-family: 'Jost', sans-serif;
  font-size: 24px;
  font-weight: 600;
  font-style: italic;
}

.footer-links {
  display: flex;
  gap: var(--kio-space-lg);
}

.footer-links a {
  font-size: 14px;
  font-weight: 400;
  color: var(--kio-gray-light);
  transition: color var(--kio-duration-fast) var(--kio-ease-out);
}

.footer-links a:hover {
  color: var(--kio-white);
}

/* ──────────────────────────────────────────────────────────────────────────
   8b) FINAL SECTION — se apaga la luz
   ────────────────────────────────────────────────────────────────────────── */
.final-section {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--kio-space-2xl) var(--kio-space-lg);
  background: var(--kio-white);
  color: var(--kio-black);
  transition: background 1.5s ease, color 1.5s ease;
}

.final-section.ending-dark {
  background: var(--kio-black);
  color: var(--kio-white);
}

.final-kio-letters {
  width: min(380px, 70vw);
  height: auto;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.2s var(--kio-ease-out), transform 1.2s var(--kio-ease-out);
  filter: invert(1) brightness(0.5);
}

.final-section.ending-dark .final-kio-letters {
  opacity: 1;
  transform: translateY(0);
}

.final-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--kio-space-xl);
}

.final-slogan {
  font-family: 'Jost', sans-serif;
  font-size: 18px;
  font-weight: 300;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--kio-white);
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 1.2s ease 2s, transform 1.2s ease 2s;
}

.final-section.ending-dark .final-slogan {
  opacity: 0.7;
  transform: translateY(0);
}

.final-socials {
  display: flex;
  gap: var(--kio-space-xl);
  font-family: 'Jost', sans-serif;
  font-size: 16px;
  font-weight: 300;
}

.final-socials a {
  color: inherit;
  text-decoration: none;
  opacity: 0.6;
  transition: opacity 0.3s ease;
}

.final-socials a:hover {
  opacity: 1;
}

/* ──────────────────────────────────────────────────────────────────────────
   DARK LANDING MODE — triggered when lamp goes off at the end
   ────────────────────────────────────────────────────────────────────────── */
body.dark-landing .hero,
body.dark-landing .hero.room-lit {
  background: var(--kio-black);
  color: var(--kio-white);
}

body.dark-landing .hero.room-lit .kio-letters,
body.dark-landing .kio-letters {
  filter: invert(1);
}

body.dark-landing .hero-text .kio-tagline,
body.dark-landing .hero.room-lit .hero-text .kio-tagline {
  color: var(--kio-gray-light);
}

body.dark-landing section.bg-white {
  background: var(--kio-black);
  color: var(--kio-white);
}

body.dark-landing .split-quote {
  color: var(--kio-gray-light);
}

body.dark-landing .split-phone img {
  filter: drop-shadow(0 20px 40px rgba(255,255,255,0.08));
}

body.dark-landing .final-section,
body.dark-landing .final-section.ending-dark {
  background: var(--kio-black);
  color: var(--kio-white);
}

body.dark-landing .lamp-on {
  opacity: 0;
}

body.dark-landing .lamp-off {
  opacity: 0.5;
  filter: brightness(0.2) grayscale(1) drop-shadow(0 0 3px rgba(255,255,255,0.35));
}

body.dark-landing .lamp-glow {
  opacity: 0;
}

body.dark-landing .kio-btn-light {
  background: var(--kio-white);
  color: var(--kio-black);
}

/* CTA section (white → dark on lamp off) */
body.dark-landing .cta-final {
  background: var(--kio-black);
  color: var(--kio-white);
}

body.dark-landing .cta-final .section-text {
  color: var(--kio-gray-light);
}

body.dark-landing .cta-final .kio-btn-dark {
  background: var(--kio-white);
  color: var(--kio-black);
}

/* ──────────────────────────────────────────────────────────────────────────
   9) SCROLL REVEAL ANIMATIONS
   ────────────────────────────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--kio-ease-out), transform 0.8s var(--kio-ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* Focus states */
a:focus-visible,
.kio-btn:focus-visible {
  outline: 2px solid var(--kio-black);
  outline-offset: 3px;
}

.bg-black a:focus-visible,
.bg-black .kio-btn:focus-visible,
.cta-final a:focus-visible,
.cta-final .kio-btn:focus-visible {
  outline-color: var(--kio-white);
}

/* ──────────────────────────────────────────────────────────────────────────
   10) EASTER EGG: Dark mode toggle easter egg (click "Kio" brand 3 times)
   ────────────────────────────────────────────────────────────────────────── */

/* ──────────────────────────────────────────────────────────────────────────
   11) PRELUDE STATE (room dark, lamp flicker)
   ────────────────────────────────────────────────────────────────────────── */
body.prelude {
  background: #000;
}

/* ──────────────────────────────────────────────────────────────────────────
   12) RESPONSIVE
   Orden: base (desktop) → 1600px+ (grande/4K) → 1024px (tablet)
          → 768px (mobile) → 380px (mobile chico)
   El scroll-snap "mandatory" (definido en la sección 2, en <html>) se
   mantiene SIEMPRE activo, en todas las resoluciones — eso es lo que
   ustedes querían: bajar/subir siempre mueve exactamente un bloque.
   ────────────────────────────────────────────────────────────────────────── */

/* ---- 12.1) Pantallas grandes / 4K (≥1600px) ----
   Bloques más "llenos": más padding, elementos más grandes,
   tipografía por encima del tope de los clamp() base. */
@media (min-width: 1600px) {
  :root {
    --kio-space-3xl: 96px;
    --kio-space-4xl: 140px;
    --kio-space-5xl: 180px;
  }

  .container { max-width: 1500px; }
  .container-narrow { max-width: 900px; }
  .container-que-es { max-width: 1700px; }

  .kio-h1 { font-size: 120px; }
  .kio-h2 { font-size: 76px; }
  .kio-h3 { font-size: 48px; }
  .kio-body-lg { font-size: 26px; }
  .section-kio-title { font-size: 76px; }
  .que-es-text { font-size: 22px; }

  .feature-grid {
    max-width: 1600px;
    gap: var(--kio-space-2xl);
  }
  .feature-card { padding: var(--kio-space-xl); }
  .feature-card h3 { font-size: 20px; }
  .feature-card p { font-size: 16px; }

  .kio-letters,
  .final-kio-letters { width: min(460px, 30vw); }

  .split-layout { gap: var(--kio-space-4xl); max-width: 1400px; }
  .split-phone { width: 300px; }
  .split-quote { font-size: 44px; max-width: 620px; }

  .kio-btn { padding: 16px 40px; font-size: 18px; }

  .timeline { gap: var(--kio-space-2xl); margin: var(--kio-space-3xl) 0; }
  .timeline-label { font-size: 15px; }
}

/* ---- 12.2) Tablet (hasta 1024px) ---- */
@media (max-width: 1024px) {
  /* El bloque completo scrollea internamente si el contenido no entra en
     una pantalla, pero el snap sigue siendo "mandatory": un scroll = un bloque. */
  section, .hero, .cta-final {
    padding: var(--kio-space-2xl) var(--kio-space-md);
    height: 100vh;
    height: 100dvh;
    max-height: 100dvh;
    overflow-y: auto;
    overscroll-behavior-y: contain;
    scroll-snap-stop: always;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--kio-space-lg);
  }

  .split-layout {
    gap: var(--kio-space-lg);
  }

  .split-phone {
    width: 190px;
  }

  .container {
    max-width: 900px;
  }
}

/* ---- 12.3) Mobile (hasta 768px) ---- */
@media (max-width: 768px) {
  .hero-text .kio-tagline {
    max-width: 100%;
    font-size: clamp(18px, 5vw, 24px);
  }

  /* ¿Kio? — título y párrafo comprimidos para que entren en un bloque */
  .section-kio-title {
    font-size: 34px;
    margin-bottom: var(--kio-space-xs);
  }

  .que-es-text {
    font-size: 14px;
    line-height: 1.4;
  }

  /* Feature grid: 1 columna (4 filas) en pantalla chica — el bloque
     puede scrollear internamente si no entra completo (ver 12.2),
     así que no hace falta comprimir tanto como antes */
  .feature-grid {
    grid-template-columns: 1fr;
    gap: var(--kio-space-md);
    margin-top: var(--kio-space-lg);
  }

  .feature-card {
    padding: var(--kio-space-md);
  }

  .feature-card h3 {
    font-size: 15px;
    margin-bottom: 6px;
  }

  .feature-card p {
    font-size: 13px;
    line-height: 1.4;
  }

  /* Split layout: el texto ocupa toda la fila arriba, las dos imágenes
     de teléfono quedan juntas, una al lado de la otra, abajo */
  .split-layout {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--kio-space-md);
    text-align: center;
  }

  .split-text {
    order: 1;
    flex: 1 1 100%;
  }

  .split-phones {
    order: 2;
    flex: 1 1 45%;
    display: flex;
    justify-content: center;
  }

  .split-quote {
    max-width: 100%;
    font-size: clamp(18px, 4.5vw, 24px);
  }

  .split-phone {
    width: 120px;
  }

  .phone-maker {
    transform: translateX(-30%) rotate(-4deg);
    opacity: 0;
  }

  .phone-lector {
    transform: translateX(30%) rotate(4deg);
    opacity: 0;
  }

  .phone-maker.visible,
  .phone-lector.visible {
    transform: translateX(0) rotate(0deg);
    opacity: 1;
  }

  .bullets {
    max-width: 100%;
  }

  /* Timeline: pasa de horizontal a vertical, con línea a la izquierda,
     y el bloque completo centrado horizontalmente en la sección */
  .timeline {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--kio-space-lg);
    padding-left: 28px;
    width: fit-content;
    margin: var(--kio-space-2xl) auto;
  }

  .timeline::before {
    top: 6px;
    left: 5px;
    width: 1px;
    height: 55%;
  }

  .timeline::after {
    top: calc(55% + 6px);
    right: auto;
    left: 5px;
    width: 1px;
    height: calc(45% - 6px);
    background: repeating-linear-gradient(
      to bottom,
      var(--kio-gray-neutral) 0px,
      var(--kio-gray-neutral) 4px,
      transparent 4px,
      transparent 8px
    );
  }

  .timeline-item {
    flex-direction: row;
    align-items: center;
    gap: var(--kio-space-md);
  }

  .timeline-label {
    text-align: left;
  }

  .kio-btn {
    padding: 14px 28px;
    font-size: 15px;
  }

  .final-socials {
    flex-direction: column;
    gap: var(--kio-space-md);
  }

  .beta-form {
    flex-direction: column;
    align-items: stretch;
  }

  .beta-submit {
    width: 100%;
  }
}

/* ---- 12.4) Phones muy chicos (≤380px) ---- */
@media (max-width: 380px) {
  .kio-letters { width: min(200px, 62vw); }
  .hero-text .kio-tagline { font-size: 16px; }
  .kio-btn { padding: 12px 20px; font-size: 14px; }
  section, .hero, .cta-final { padding: var(--kio-space-lg) var(--kio-space-sm); }
  .beta-input { min-width: 0; font-size: 15px; }
  .section-kio-title { font-size: 28px; }
  .que-es-text { font-size: 13px; }
}

/* No-JS fallback: show all content immediately */
html:not(.js) .reveal,
html:not(.js) .hero-content,
html:not(.js) .phone-maker,
html:not(.js) .phone-lector {
  opacity: 1;
  transform: none;
}

/* ──────────────────────────────────────────────────────────────────────────
   13) REDUCED MOTION — must be last to override all animations
   ────────────────────────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
    scroll-snap-type: none;
  }
  .reveal,
  .hero-content,
  .split-phone,
  .lamp-img,
  .lamp-glow,
  .hero,
  .final-section {
    transition: none !important;
    animation: none !important;
  }
  .js .hero-content,
  .js .reveal {
    opacity: 1;
    transform: none;
  }
  .phone-maker,
  .phone-lector {
    transform: none;
    opacity: 1;
  }
}