/* Kairo — estilos del sitio. Tokens en :root; clases escritas a mano. */

@font-face { font-family: "Outfit"; src: url("../fonts/Outfit-Regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Outfit"; src: url("../fonts/Outfit-Bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }

:root {
  --ink: #1B2A4A;
  --accent: #00B3C6;
  --accent-text: #00788A;
  --accent-soft: rgba(0, 179, 198, .14);
  --night: #101A2E;
  --night-2: #16223A;
  --night-line: #24324F;
  --paper: #FFFFFF;
  --paper-2: #F5F7FA;
  --line: #E3E8F0;
  --muted: #5B6B85;
  --muted-dark: #A7B6CC;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 1px 2px rgba(16, 26, 46, .06), 0 12px 32px rgba(16, 26, 46, .08);
  --ease: cubic-bezier(.22, .8, .24, 1);
  --wrap: 1200px;
  --font: "Outfit", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, monospace;
  --page: var(--paper);
  --hover-line: #CFE7EC;
  color-scheme: light;
}

/* Tema oscuro: por preferencia del sistema o elegido con el botón */
:root[data-theme="dark"] {
  --ink: #E6EDF6;
  --accent-text: #2CC7D8;
  --accent-soft: rgba(0, 179, 198, .12);
  --paper: #121C30;
  --paper-2: #0E1728;
  --page: #0B1322;
  --line: #22304B;
  --muted: #A7B6CC;
  --hover-line: #2B5A6A;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 16px 40px rgba(0, 0, 0, .35);
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #E6EDF6;
    --accent-text: #2CC7D8;
    --accent-soft: rgba(0, 179, 198, .12);
    --paper: #121C30;
    --paper-2: #0E1728;
    --page: #0B1322;
    --line: #22304B;
    --muted: #A7B6CC;
    --hover-line: #2B5A6A;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 16px 40px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); font-size: 1.0625rem; line-height: 1.65; color: var(--ink); background: var(--page); -webkit-font-smoothing: antialiased; transition: background-color .4s, color .4s; }
.section { transition: background-color .4s; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { margin: 0; line-height: 1.1; letter-spacing: -.02em; font-weight: 700; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap { width: min(100% - 32px, var(--wrap)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 16px; top: -60px; z-index: 100; padding: 10px 16px; border-radius: 10px; background: var(--accent); color: var(--night); font-weight: 700; text-decoration: none; transition: top .2s; }
.skip:focus { top: 12px; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* ---------- Botones ---------- */
.btn { --b: transparent; position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 24px; border-radius: 999px; border: 1.5px solid var(--b); font: 700 1rem/1 var(--font); text-decoration: none; cursor: pointer; isolation: isolate; overflow: hidden; transition: transform .25s var(--ease), box-shadow .25s var(--ease), background-color .25s, color .25s, border-color .25s; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0) scale(.98); }
.btn--sm { min-height: 44px; padding: 0 18px; font-size: .95rem; }
.btn--block { width: 100%; }
.btn--accent { background: var(--accent); color: var(--night); box-shadow: 0 8px 24px rgba(0, 179, 198, .28); }
.btn--accent::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.55) 50%, transparent 70%); transform: translateX(-120%); transition: transform .7s var(--ease); }
.btn--accent:hover::after { transform: translateX(120%); }
.btn--accent:hover { box-shadow: 0 12px 32px rgba(0, 179, 198, .4); }
.btn--ghost { --b: rgba(255,255,255,.28); color: #fff; }
.btn--ghost:hover { --b: #fff; background: rgba(255,255,255,.06); }
.btn--outline { --b: var(--ink); color: var(--ink); background: transparent; }
.btn--outline:hover { background: var(--ink); color: var(--page); }

/* ---------- Header ---------- */
.header { position: fixed; inset: 0 0 auto; z-index: 50; transition: background-color .3s, box-shadow .3s, backdrop-filter .3s; }
.header__bar { display: flex; align-items: center; justify-content: space-between; height: 76px; transition: height .3s var(--ease); }
.header.is-scrolled { background: rgba(16, 26, 46, .86); backdrop-filter: blur(14px); box-shadow: 0 1px 0 var(--night-line); }
.header.is-scrolled .header__bar { height: 64px; }
.header__logo img { width: 124px; height: auto; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav ul { display: flex; gap: 26px; }
.nav ul a { position: relative; color: var(--muted-dark); text-decoration: none; font-size: .98rem; padding: 6px 0; transition: color .2s; }
.nav ul a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease); }
.nav ul a:hover, .nav ul a.is-active { color: #fff; }
.nav ul a:hover::after, .nav ul a.is-active::after { transform: scaleX(1); }
.theme-toggle { order: 3; display: grid; place-items: center; width: 44px; height: 44px; margin-left: 14px; border-radius: 12px; border: 1px solid var(--night-line); background: transparent; color: #fff; cursor: pointer; transition: border-color .25s, background-color .25s, transform .25s var(--ease); }
.theme-toggle:hover { border-color: var(--accent); background: rgba(0, 179, 198, .1); }
.theme-toggle svg { grid-area: 1 / 1; width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; transition: opacity .3s, transform .5s var(--ease); }
.theme-toggle__sun { opacity: 0; transform: rotate(-90deg) scale(.5); }
:root[data-theme="dark"] .theme-toggle__sun { opacity: 1; transform: none; }
:root[data-theme="dark"] .theme-toggle__moon { opacity: 0; transform: rotate(90deg) scale(.5); }
.header__bar > .nav { order: 2; margin-left: auto; }
.nav-toggle { order: 4; }
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; border-radius: 10px; background: transparent; cursor: pointer; }
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after { display: block; width: 22px; height: 2px; margin: auto; background: #fff; border-radius: 2px; transition: transform .3s var(--ease), opacity .2s; }
.nav-toggle__bars { position: relative; }
.nav-toggle__bars::before, .nav-toggle__bars::after { content: ""; position: absolute; left: 0; }
.nav-toggle__bars::before { top: -7px; }
.nav-toggle__bars::after { top: 7px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 150px 0 110px; background: var(--night); color: #fff; }
.hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px); background-size: 56px 56px; mask-image: radial-gradient(ellipse 80% 70% at 60% 40%, #000 30%, transparent 80%); }
.hero::after { content: ""; position: absolute; width: 760px; height: 760px; right: -160px; top: -120px; border-radius: 50%; background: radial-gradient(circle, rgba(0, 179, 198, .18), transparent 62%); filter: blur(10px); animation: breathe 9s ease-in-out infinite; pointer-events: none; }
.hero__traces { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.hero__traces .trace { stroke: var(--night-line); stroke-width: 2; }
.hero__traces circle { fill: none; stroke: var(--night-line); stroke-width: 2; }
.hero__traces .trace { stroke-dasharray: 6 10; animation: dash 22s linear infinite; }
.hero__grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; gap: 8px; align-items: center; font-size: .82rem; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); }
.eyebrow [lang="ja"] { letter-spacing: .08em; font-family: "Yu Gothic", "Meiryo", sans-serif; }
.eyebrow--dark { color: var(--accent-text); }
.hero h1 { margin-top: 18px; font-size: clamp(2.8rem, 6.2vw, 5.2rem); letter-spacing: -.025em; word-spacing: .06em; line-height: 1; }
.hero h1 .dot { color: var(--accent); display: inline-block; animation: pulse-dot 2.4s ease-in-out infinite; }
.lead { margin-top: 22px; max-width: 34ch; font-size: clamp(1.1rem, 1.5vw, 1.3rem); color: var(--muted-dark); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.trust { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 36px; font-size: .92rem; color: var(--muted-dark); }
.trust li { position: relative; padding-left: 18px; }
.trust li::before { content: ""; position: absolute; left: 0; top: .62em; width: 8px; height: 8px; border-radius: 50%; border: 2px solid var(--accent); }

.hero__art { position: relative; }
.hero__symbol { width: min(100%, 400px); margin-inline: auto; overflow: visible; transform: translateY(-40px); }
.hero__symbol .ring { stroke: var(--night-line); stroke-width: 1.5; stroke-dasharray: 3 9; transform-origin: 250px 230px; }
.hero__symbol .ring--1 { animation: spin 60s linear infinite; }
.hero__symbol .ring--2 { animation: spin 40s linear infinite reverse; }
.hero__symbol .flow { stroke: #fff; stroke-width: 40; stroke-dasharray: 260; stroke-dashoffset: 260; animation: draw 1.4s .3s var(--ease) forwards; }
.hero__symbol .flow--b { animation-delay: .5s; }
.hero__symbol .core { transform-origin: 380px 230px; animation: core-in .6s 1.4s var(--ease) both, core-glow 3s 2s ease-in-out infinite; }

.term { position: absolute; right: -8px; bottom: -92px; width: min(330px, 86%); border-radius: 14px; background: rgba(22, 34, 58, .92); border: 1px solid var(--night-line); box-shadow: 0 24px 60px rgba(0,0,0,.4); backdrop-filter: blur(8px); overflow: hidden; animation: float 6s ease-in-out infinite; }
.term__bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--night-line); font-size: .78rem; color: var(--muted-dark); }
.term__bar i { width: 10px; height: 10px; border-radius: 50%; background: #3A4A68; }
.term__bar i:first-child { background: #FF5F57; }
.term__bar i:nth-child(2) { background: #FEBC2E; }
.term__bar i:nth-child(3) { background: #28C840; }
.term__bar span { margin-left: 8px; }
.term__body { margin: 0; min-height: 132px; padding: 14px 16px; font: .86rem/1.7 var(--mono); color: #DCE4F0; white-space: pre-wrap; }
.term__body .p { color: var(--accent); }
.term__body .ok { color: #5EE6B0; }
.term__body .cur { display: inline-block; width: 8px; height: 1.05em; vertical-align: -2px; background: var(--accent); animation: blink 1s steps(1) infinite; }

/* ---------- Secciones ---------- */
.section { padding: clamp(80px, 10vw, 128px) 0; }
.section--alt { background: var(--paper-2); }
.section__head { max-width: 680px; margin: 0 auto 56px; text-align: center; }
.section__head--left { margin: 0; text-align: left; }
.section__head h2 { margin-top: 14px; font-size: clamp(2rem, 4vw, 3rem); }
.section__head p:not(.eyebrow) { margin-top: 16px; color: var(--muted); font-size: 1.12rem; }

.cards { display: grid; gap: 20px; }
.cards--4 { grid-template-columns: repeat(4, 1fr); }
.cards--3 { grid-template-columns: repeat(3, 1fr); }

.card, .solution, .plan, .step, .why__list li, .support { position: relative; border-radius: var(--radius-lg); background: var(--paper); border: 1px solid var(--line); transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s; }
.card::before, .solution::before, .plan::before { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: 0; background: radial-gradient(420px circle at var(--x, 50%) var(--y, 50%), var(--accent-soft), transparent 45%); transition: opacity .35s; }
.card:hover, .solution:hover, .plan:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--hover-line); }
.card:hover::before, .solution:hover::before, .plan:hover::before { opacity: 1; }

.card { padding: 30px 26px; }
.icon { width: 46px; height: 46px; padding: 11px; border-radius: 12px; background: var(--night); fill: none; stroke: var(--accent); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; transition: transform .4s var(--ease); }
.card:hover .icon { transform: rotate(-6deg) scale(1.08); }
.card h3 { margin-top: 22px; font-size: 1.28rem; }
.card > p { margin-top: 10px; color: var(--muted); }
.card ul, .plan ul { margin-top: 18px; display: grid; gap: 8px; font-size: .97rem; }
.card li, .plan li { position: relative; padding-left: 22px; }
.card li::before, .plan li::before { content: ""; position: absolute; left: 0; top: .55em; width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--accent-text); }

.solution { padding: 28px; overflow: hidden; }
.solution h3 { font-size: 1.2rem; margin-bottom: 14px; }
.solution p { color: var(--muted); font-size: .98rem; }
.solution p + p { margin-top: 8px; }
.solution strong { color: var(--ink); }
.solution::after { content: ""; position: absolute; left: 28px; right: 28px; top: 0; height: 3px; border-radius: 0 0 3px 3px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .5s var(--ease); }
.solution:hover::after { transform: scaleX(1); }

/* Pasos con línea de circuito */
.steps { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.steps::before { content: ""; position: absolute; left: 6%; right: 6%; top: 47px; height: 2px; background: linear-gradient(90deg, var(--accent) var(--progress, 0%), var(--line) var(--progress, 0%)); transition: background .2s; }
.step { padding: 28px 24px; background: transparent; border: 0; text-align: center; }
.step__n { position: relative; z-index: 1; display: grid; place-items: center; width: 40px; height: 40px; margin: 0 auto 20px; border-radius: 50%; background: var(--paper); border: 2px solid var(--accent-text); font: 700 .9rem var(--mono); color: var(--accent-text); transition: background .3s, color .3s; }
.step.is-in .step__n { background: var(--night); color: var(--accent); border-color: var(--accent); }
.step h3 { font-size: 1.2rem; }
.step p { margin-top: 10px; color: var(--muted); }

/* Precios */
.plans { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: stretch; }
.plan { display: flex; flex-direction: column; padding: 30px 26px; }
.plan h3 { font-size: 1.2rem; }
.plan__price { margin-top: 14px; font-size: 2.1rem; font-weight: 700; letter-spacing: -.03em; }
.plan__price span { display: block; font-size: .85rem; font-weight: 400; letter-spacing: 0; color: var(--muted); }
.plan__price small { font-size: 1rem; font-weight: 400; color: var(--muted); }
.plan ul { flex: 1; margin-bottom: 26px; }
.plan--featured { background: var(--night); color: #fff; border-color: transparent; }
.plan--featured::after { content: ""; position: absolute; inset: 0; padding: 2px; border-radius: inherit; pointer-events: none; background: conic-gradient(from var(--angle, 0deg), var(--accent), transparent 30%, transparent 70%, var(--accent)); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask: linear-gradient(#000 0 0) content-box exclude, linear-gradient(#000 0 0); animation: rotate-border 5s linear infinite; }
.plan--featured { isolation: isolate; }
.plan--featured .plan__price span, .plan--featured li { color: var(--muted-dark); }
.plan--featured li::before { border-color: var(--accent); }
.plan__tag { position: absolute; top: -13px; left: 26px; padding: 4px 12px; border-radius: 999px; background: var(--accent); color: var(--night); font-size: .78rem; font-weight: 700; }
.support { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 20px; padding: 26px 30px; }
.support p:not(.plan__price) { margin-top: 6px; color: var(--muted); }
.support .plan__price { margin: 0; }
.terms { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 28px; margin-top: 30px; color: var(--muted); font-size: .95rem; }
.terms li::before { content: "✓"; margin-right: 8px; color: var(--accent-text); font-weight: 700; }

/* Por qué */
.why { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: start; }
.why__list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.why__list li { padding: 26px; }
.why__list h3 { font-size: 1.15rem; }
.why__list h3::before { content: ""; display: block; width: 28px; height: 3px; margin-bottom: 16px; border-radius: 2px; background: var(--accent); transition: width .4s var(--ease); }
.why__list li:hover h3::before { width: 56px; }
.why__list p { margin-top: 8px; color: var(--muted); }

/* FAQ */
.faq__list { max-width: 820px; margin: 0 auto; display: grid; gap: 12px; }
.faq details { border-radius: var(--radius); background: var(--paper); border: 1px solid var(--line); transition: border-color .3s, box-shadow .3s; }
.faq details[open] { border-color: var(--hover-line); box-shadow: var(--shadow); }
.faq summary { position: relative; display: flex; align-items: center; min-height: 64px; padding: 16px 64px 16px 24px; font-weight: 700; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 24px; width: 12px; height: 12px; border-right: 2px solid var(--accent-text); border-bottom: 2px solid var(--accent-text); transform: translateY(-3px) rotate(45deg); transition: transform .3s var(--ease); }
.faq details[open] summary::after { transform: translateY(3px) rotate(-135deg); }
.faq details p { padding: 0 24px 22px; color: var(--muted); }

/* Contacto */
.contact { position: relative; overflow: hidden; padding: clamp(80px, 10vw, 128px) 0; background: var(--night); color: #fff; }
.contact::before { content: ""; position: absolute; width: 640px; height: 640px; left: -220px; bottom: -280px; border-radius: 50%; background: radial-gradient(circle, rgba(0, 179, 198, .16), transparent 62%); }
.contact__grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact h2 { margin-top: 14px; font-size: clamp(2rem, 4vw, 3rem); }
.contact__list { margin-top: 30px; display: grid; gap: 12px; color: var(--muted-dark); }
.contact__list a { color: #fff; text-decoration-color: var(--accent); text-underline-offset: 4px; }
.form { padding: 32px; border-radius: var(--radius-lg); background: var(--night-2); border: 1px solid var(--night-line); }
.field + .field { margin-top: 18px; }
.field label { display: block; margin-bottom: 8px; font-weight: 700; font-size: .95rem; }
.field input, .field textarea { width: 100%; min-height: 48px; padding: 12px 14px; border-radius: 12px; border: 1.5px solid var(--night-line); background: var(--night); color: #fff; font: 400 1rem/1.5 var(--font); transition: border-color .2s, box-shadow .2s; }
.field textarea { resize: vertical; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px rgba(0, 179, 198, .2); }
.field.is-invalid input, .field.is-invalid textarea { border-color: #FF8A8A; }
.field__error { min-height: 1.3em; margin-top: 6px; font-size: .88rem; color: #FFB4B4; }
.form .btn { margin-top: 10px; }
.form__note { margin-top: 12px; font-size: .88rem; color: var(--muted-dark); text-align: center; }

/* Footer */
.footer { position: relative; padding: 0 0 96px; background: #0B1322; color: var(--muted-dark); overflow: hidden; }
.footer::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px); background-size: 56px 56px; mask-image: linear-gradient(#000, transparent 70%); pointer-events: none; }
.footer a { color: var(--muted-dark); text-decoration: none; transition: color .2s; }
.footer a:hover { color: #fff; }
.footer__cta { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: -1px; padding: 44px 0; border-bottom: 1px solid var(--night-line); }
.footer__cta h2 { color: #fff; font-size: clamp(1.5rem, 2.6vw, 2rem); }
.footer__cta p { margin-top: 6px; }
.footer__grid { position: relative; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding: 56px 0 48px; }
.footer__brand img { width: 128px; height: auto; margin-bottom: 18px; }
.footer__brand p { max-width: 36ch; font-size: .97rem; }
.footer__brand em { font-style: normal; color: var(--accent); }
.footer__brand [lang="ja"] { color: #fff; margin-right: 4px; }
.footer__col h3 { margin-bottom: 18px; color: #fff; font-size: .82rem; letter-spacing: .18em; text-transform: uppercase; }
.footer__col ul { display: grid; gap: 12px; font-size: .97rem; }
.footer__col a { position: relative; }
.footer__col a::before { content: ""; position: absolute; left: -14px; top: .6em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); opacity: 0; transform: translateX(-4px); transition: opacity .25s, transform .25s var(--ease); }
.footer__col a:hover::before { opacity: 1; transform: none; }
.footer__contact li { display: grid; gap: 2px; }
.footer__contact span { font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: #6F80A0; }
.footer__contact a { color: #fff; overflow-wrap: anywhere; }
.footer__social { display: flex; gap: 10px; margin-top: 24px; }
.footer__social a { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--night-line); transition: border-color .25s, background-color .25s, transform .25s var(--ease); }
.footer__social a:hover { border-color: var(--accent); background: rgba(0,179,198,.1); transform: translateY(-3px); }
.footer__social svg { width: 20px; height: 20px; fill: none; stroke: #fff; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.footer__social svg .fill { fill: #fff; stroke: none; }
.footer__bottom { position: relative; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 28px; padding-top: 24px; border-top: 1px solid var(--night-line); font-size: .88rem; }
.footer__stack { display: flex; flex-wrap: wrap; gap: 8px; }
.footer__stack li { padding: 4px 10px; border-radius: 999px; border: 1px solid var(--night-line); font: .78rem var(--mono); color: #8A9BB8; }
.footer__top { display: inline-flex; gap: 6px; align-items: center; min-height: 44px; }
.footer__top span { transition: transform .25s var(--ease); }
.footer__top:hover span { transform: translateY(-3px); }

/* WhatsApp flotante */
.wa-float { position: fixed; right: 20px; bottom: 20px; z-index: 60; display: grid; place-items: center; width: 58px; height: 58px; border-radius: 50%; background: #25D366; box-shadow: 0 10px 28px rgba(0,0,0,.25); transition: transform .3s var(--ease); }
.wa-float::before { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 2px solid #25D366; animation: ring 2.4s ease-out infinite; }
.wa-float:hover { transform: scale(1.08); }
.wa-float svg { width: 30px; height: 30px; fill: #fff; }

/* ---------- Animación de aparición ---------- */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); transition-delay: var(--d, 0ms); }
.js .reveal.is-in { opacity: 1; transform: none; }
.js .hero__copy > * { opacity: 0; transform: translateY(20px); animation: rise .9s var(--ease) forwards; }
.js .hero__copy > :nth-child(2) { animation-delay: .1s; }
.js .hero__copy > :nth-child(3) { animation-delay: .2s; }
.js .hero__copy > :nth-child(4) { animation-delay: .3s; }
.js .hero__copy > :nth-child(5) { animation-delay: .4s; }

@property --angle { syntax: "<angle>"; inherits: false; initial-value: 0deg; }
@keyframes rotate-border { to { --angle: 360deg; } }
@keyframes rise { to { opacity: 1; transform: none; } }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes dash { to { stroke-dashoffset: -320; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes core-in { from { transform: scale(0); } to { transform: scale(1); } }
@keyframes core-glow { 0%, 100% { filter: drop-shadow(0 0 0 rgba(0,179,198,0)); } 50% { filter: drop-shadow(0 0 18px rgba(0,179,198,.7)); } }
@keyframes breathe { 0%, 100% { transform: scale(1); opacity: .9; } 50% { transform: scale(1.08); opacity: 1; } }
@keyframes pulse-dot { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes blink { 50% { opacity: 0; } }
@keyframes ring { from { transform: scale(1); opacity: .7; } to { transform: scale(1.6); opacity: 0; } }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .cards--4, .plans { grid-template-columns: repeat(2, 1fr); }
  .plan--featured { order: -1; }
}
@media (max-width: 900px) {
  .nav-toggle { display: block; margin-left: 6px; }
  .theme-toggle { margin-left: auto; }
  .nav { position: fixed; inset: 64px 0 auto; flex-direction: column; align-items: stretch; gap: 20px; padding: 24px 16px 28px; background: var(--night); border-bottom: 1px solid var(--night-line); transform: translateY(-120%); visibility: hidden; transition: transform .4s var(--ease), visibility .4s; }
  .nav.is-open { transform: none; visibility: visible; }
  .nav ul { flex-direction: column; gap: 4px; }
  .nav ul a { display: block; padding: 12px 4px; font-size: 1.1rem; }
  .header { background: rgba(16, 26, 46, .92); }
  .header__bar { height: 64px; }
  .hero { padding: 120px 0 120px; }
  .hero__grid, .why, .contact__grid { grid-template-columns: 1fr; }
  .hero__art { max-width: 420px; margin: 20px auto 0; width: 100%; }
  .cards--3 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__cta { flex-direction: column; align-items: flex-start; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps::before { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 1rem; }
  .cards--4, .cards--3, .plans, .why__list, .steps { grid-template-columns: 1fr; }
  .term { right: 0; width: 92%; bottom: -70px; }
  .hero__symbol { transform: none; width: 78%; }
  .support { flex-direction: column; align-items: flex-start; }
  .form { padding: 24px 18px; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px 20px; }
  .footer__brand, .footer__col:last-child { grid-column: 1 / -1; }
  .footer__col ul { font-size: .93rem; }
  .footer__cta .btn { width: 100%; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .hero__actions .btn { flex: 1 1 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .js .reveal, .js .hero__copy > * { opacity: 1; transform: none; }
  .hero__symbol .flow { stroke-dashoffset: 0; }
}