/* =========================================================
   ZENKO — landing theme (v2)
   Dark premium atlético. Todo el tema vive en :root.
   Objetivo: confianza + fuerza + legibilidad + color que resalta.
   ========================================================= */
:root {
  /* Paleta */
  --bg:        #0A0D0B;
  --bg-2:      #0E1310;
  --surface-1: #12181400;
  --surface-1s:#131A15;
  --surface-2: #18211A;
  --surface-3: #1E2820;
  --line:      rgba(255, 255, 255, 0.08);
  --line-2:    rgba(255, 255, 255, 0.15);

  --text:      #F4F7F0;
  --muted:     #A4B0A2;
  --muted-2:   #74806F;

  --accent:      #C8F94D;   /* lima eléctrico */
  --accent-hi:   #DBFF6E;   /* lima brillante (hover) */
  --accent-ink:  #0A0D0B;   /* texto sobre lima */
  --warm:        #FF8A3D;   /* ámbar (batido) */

  /* Tipografía */
  --font-display: 'Anton', 'Arial Narrow', sans-serif;
  --font-body:    'Manrope', system-ui, sans-serif;

  /* Formas */
  --radius:    18px;
  --radius-sm: 12px;
  --radius-lg: 26px;

  /* Sombra / glow */
  --shadow:    0 30px 70px -30px rgba(0, 0, 0, 0.8);
  --glow:      0 0 0 1px var(--line), 0 40px 90px -40px rgba(200, 249, 77, 0.32);

  /* Layout */
  --maxw: 1180px;
  --gap:  clamp(1rem, 3vw, 2rem);
}

/* ============ Reset ============ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; overflow-x: hidden; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
/* Grano sutil global para dar textura premium */
body::before {
  content: ""; position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: 0.035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3 { margin: 0; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
main, header, footer, section { position: relative; z-index: 2; }

/* ============ Layout utils ============ */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: clamp(1.1rem, 4vw, 2.5rem); }
.wrap--narrow { max-width: 800px; }

.section { padding-block: clamp(4rem, 9vw, 7.5rem); }
.section--alt { background: linear-gradient(180deg, var(--bg-2), var(--bg)); border-block: 1px solid var(--line); }

.section__head { max-width: 720px; margin-bottom: clamp(2.2rem, 5vw, 3.5rem); }
.section__sub { color: var(--muted); font-size: 1.1rem; margin-top: 1rem; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.76rem; font-weight: 800; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 1rem;
}
.eyebrow::before { content: ""; width: 1.6rem; height: 2px; background: var(--accent); border-radius: 2px; }

/* ============ Display type ============ */
.display {
  font-family: var(--font-display); font-weight: 400;
  line-height: 0.94; letter-spacing: 0.004em; text-transform: uppercase;
  font-size: clamp(2.4rem, 7vw, 5.6rem); overflow-wrap: break-word;
}
.display--md { font-size: clamp(2rem, 4.6vw, 3.4rem); line-height: 0.98; }
.hl { color: var(--accent); }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.55rem;
  padding: 1rem 1.6rem; border-radius: 999px; font-weight: 700; font-size: 1rem;
  border: 1px solid transparent; white-space: nowrap;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.25s ease;
}
.btn:active { transform: translateY(1px); }
.btn--accent { background: var(--accent); color: var(--accent-ink); box-shadow: 0 10px 30px -12px rgba(200,249,77,0.6); }
.btn--accent:hover { background: var(--accent-hi); box-shadow: 0 16px 40px -12px rgba(200,249,77,0.7); transform: translateY(-2px); }
.btn--ghost { border-color: var(--line-2); color: var(--text); background: rgba(255,255,255,0.02); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--sm { padding: 0.62rem 1.1rem; font-size: 0.92rem; }
.btn--block { width: 100%; }
.btn__arrow { transition: transform 0.2s ease; }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* ============ NAV ============ */
.nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(10, 13, 11, 0.72);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; gap: 1.5rem; height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-weight: 800; }
.brand__mark { color: var(--accent); display: inline-flex; }
.brand__word { font-family: var(--font-display); font-size: 1.45rem; letter-spacing: 0.04em; }
.brand__kana { color: var(--accent); font-family: var(--font-body); font-size: 0.82rem; margin-left: 0.35rem; vertical-align: middle; opacity: 0.85; }
.nav__links { display: flex; gap: 1.7rem; margin-left: auto; font-size: 0.96rem; font-weight: 600; color: var(--muted); }
.nav__links a { position: relative; padding-block: 0.2rem; transition: color 0.2s ease; }
.nav__links a::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px; background: var(--accent); transition: width 0.25s ease; }
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { width: 100%; }
.nav .btn { margin-left: 0.4rem; }
.nav__toggle { display: none; margin-left: auto; width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--surface-1s); color: var(--text); flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
.nav__toggle span { width: 20px; height: 2px; background: currentColor; border-radius: 2px; transition: transform 0.25s ease, opacity 0.2s ease; }

/* ============ HERO ============ */
.hero { overflow: hidden; padding-top: clamp(3rem, 7vw, 5.5rem); padding-bottom: clamp(3rem, 7vw, 5rem); }
.hero__glow {
  position: absolute; inset: -25% 20% auto -15%; height: 720px; z-index: 0;
  background:
    radial-gradient(42% 46% at 72% 28%, rgba(200, 249, 77, 0.26), transparent 68%),
    radial-gradient(40% 40% at 20% 70%, rgba(255, 138, 61, 0.10), transparent 70%);
  filter: blur(8px); pointer-events: none;
}
.hero__grid { position: relative; z-index: 2; display: grid; grid-template-columns: 1.12fr 0.88fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.hero__grid > * { min-width: 0; }
.hero__copy { max-width: 660px; }
.badge {
  display: inline-flex; align-items: center; gap: 0.5rem; margin-bottom: 1.4rem;
  font-size: 0.82rem; font-weight: 700; color: var(--muted);
  padding: 0.45rem 0.9rem 0.45rem 0.55rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface-1s);
}
.badge b { color: var(--accent); }
.badge__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(200,249,77,0.18); }
.lead { color: var(--muted); font-size: 1.2rem; margin-top: 1.4rem; max-width: 33em; }
.lead strong { color: var(--text); font-weight: 600; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2.2rem; }
.hero__chips { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 2rem; }
.hero__chips li {
  font-size: 0.86rem; font-weight: 600; color: var(--muted);
  padding: 0.42rem 0.9rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface-1s);
}
.hero__chips li::before { content: "✓"; color: var(--accent); margin-right: 0.45rem; font-weight: 800; }

.hero__visual { display: flex; justify-content: center; }
.machine-wrap { position: relative; }
.machine-wrap::after {
  content: ""; position: absolute; inset: auto 10% -6% 10%; height: 40px; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(200,249,77,0.25), transparent); filter: blur(12px);
}
.machine { width: min(100%, 340px); filter: drop-shadow(0 40px 60px rgba(0,0,0,0.6)); position: relative; }

/* Animación de entrada del hero */
.reveal-hero > * { opacity: 0; transform: translateY(18px); animation: rise 0.7s cubic-bezier(0.22,1,0.36,1) forwards; }
.reveal-hero > *:nth-child(1) { animation-delay: 0.05s; }
.reveal-hero > *:nth-child(2) { animation-delay: 0.13s; }
.reveal-hero > *:nth-child(3) { animation-delay: 0.21s; }
.reveal-hero > *:nth-child(4) { animation-delay: 0.29s; }
.reveal-hero > *:nth-child(5) { animation-delay: 0.37s; }
.hero__visual { opacity: 0; transform: translateY(18px) scale(0.98); animation: rise 0.9s 0.2s cubic-bezier(0.22,1,0.36,1) forwards; }
@keyframes rise { to { opacity: 1; transform: translateY(0) scale(1); } }

/* ============ TRUST / STATS BAND ============ */
.stats { border-block: 1px solid var(--line); background: linear-gradient(180deg, var(--surface-1s), var(--bg)); }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: clamp(1.4rem, 3vw, 2.1rem) 1.2rem; text-align: center; border-left: 1px solid var(--line); }
.stat:first-child { border-left: none; }
.stat__n { font-family: var(--font-display); font-size: clamp(1.8rem, 3.4vw, 2.6rem); color: var(--accent); line-height: 1; }
.stat__l { display: block; margin-top: 0.5rem; color: var(--muted); font-size: 0.9rem; }

/* ============ STRIP ============ */
.strip { border-block: 1px solid var(--line); background: var(--surface-1s); }
.strip p { text-align: center; color: var(--muted); padding-block: 1.2rem; font-size: 1rem; }
.strip strong { color: var(--text); }

/* ============ FORMATOS ============ */
.formats { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
.fmt-card {
  background: linear-gradient(180deg, var(--surface-1s), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(1.6rem, 3vw, 2.4rem); position: relative; overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.fmt-card:hover { transform: translateY(-4px); border-color: var(--line-2); }
.fmt-card::after { content: ""; position: absolute; inset: auto -30% -60% auto; width: 240px; height: 240px; background: radial-gradient(circle, rgba(200,249,77,0.14), transparent 70%); }
.fmt-card--warm::after { background: radial-gradient(circle, rgba(255,138,61,0.16), transparent 70%); }
.fmt-card__tag { font-size: 0.72rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.fmt-card--warm .fmt-card__tag { color: var(--warm); }
.fmt-card h3 { font-size: 1.5rem; margin: 0.55rem 0 0.75rem; }
.fmt-card p { color: var(--muted); position: relative; z-index: 1; }

.note { color: var(--muted-2); font-size: 0.88rem; margin-top: 1rem; }
.note--center { text-align: center; max-width: 640px; margin-inline: auto; margin-top: 1.9rem; }

/* ============ STEPS ============ */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
.step { border-top: 2px solid var(--line-2); padding-top: 1.3rem; transition: border-color 0.25s ease; }
.step:hover { border-color: var(--accent); }
.step__n { font-family: var(--font-display); font-size: 2.4rem; color: var(--accent); line-height: 1; }
.step h3 { font-size: 1.3rem; margin: 0.7rem 0 0.5rem; }
.step p { color: var(--muted); font-size: 1rem; }

/* ============ CALCULADORA ============ */
.calc { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: var(--gap); align-items: start; }
.calc__controls {
  background: linear-gradient(180deg, var(--surface-1s), var(--bg-2));
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.3rem); display: grid; gap: 1.7rem;
}
.field label { display: block; font-weight: 700; font-size: 1rem; margin-bottom: 0.75rem; }
.field__row { display: flex; align-items: center; gap: 1rem; }
.field__out { font-family: var(--font-display); font-size: 1.35rem; color: var(--accent); min-width: 96px; text-align: right; letter-spacing: 0.02em; }
.field__hint { color: var(--muted-2); font-size: 0.84rem; margin-top: 0.55rem; }

input[type="range"] {
  -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 999px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--surface-3) 0%); outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--accent), 0 2px 12px rgba(200,249,77,0.55);
  transition: transform 0.12s ease;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.12); }
input[type="range"]::-moz-range-thumb { width: 20px; height: 20px; border-radius: 50%; background: var(--accent); border: 3px solid var(--bg); box-shadow: 0 0 0 1px var(--accent); }
input[type="range"]:focus-visible::-webkit-slider-thumb { outline: 2px solid var(--warm); outline-offset: 2px; }

.calc__result {
  background: linear-gradient(160deg, var(--surface-2), var(--surface-1s));
  border: 1px solid var(--line-2); border-radius: var(--radius-lg);
  padding: clamp(1.7rem, 3vw, 2.4rem); box-shadow: var(--glow); position: sticky; top: 92px;
}
.result__label { color: var(--muted); font-size: 0.98rem; }
.result__hero { font-family: var(--font-display); font-size: clamp(3rem, 7.5vw, 4.4rem); color: var(--accent); line-height: 1; margin: 0.4rem 0 1.5rem; letter-spacing: 0.01em; }
.result__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem 1.2rem; padding-block: 1.4rem; border-block: 1px solid var(--line); }
.result__k { display: block; color: var(--muted-2); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; }
.result__v { display: block; font-weight: 800; font-size: 1.3rem; margin-top: 0.2rem; }
.result__badges { display: flex; flex-direction: column; gap: 0.6rem; margin: 1.4rem 0; }
.result__badges li { font-size: 0.94rem; color: var(--muted); padding-left: 1.7rem; position: relative; }
.result__badges li::before { content: "✓"; position: absolute; left: 0; top: 0.1rem; color: var(--accent-ink); background: var(--accent); width: 1.2rem; height: 1.2rem; border-radius: 50%; display: grid; place-items: center; font-size: 0.72rem; font-weight: 800; }
.calc__result .btn { margin-top: 0.4rem; }

/* ============ BENEFICIOS ============ */
.benefits { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
.benefits__col { background: linear-gradient(180deg, var(--surface-1s), var(--bg-2)); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.6rem, 3vw, 2.4rem); }
.benefits__col h3 { font-size: 1.4rem; margin-bottom: 1.2rem; }
.ticks li { position: relative; padding-left: 2rem; margin-bottom: 0.9rem; color: var(--muted); }
.ticks li:last-child { margin-bottom: 0; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 0.55rem; width: 0.7rem; height: 0.7rem; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(200,249,77,0.15); }

/* ============ PRODUCTOS ============ */
.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.prod { background: linear-gradient(180deg, var(--surface-1s), var(--bg-2)); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.6rem, 3vw, 2.1rem); transition: transform 0.25s ease, border-color 0.25s ease; }
.prod:hover { transform: translateY(-6px); border-color: var(--line-2); }
.prod__icon { width: 66px; height: 66px; border-radius: 16px; display: grid; place-items: center; margin-bottom: 1.3rem; }
.prod__icon--lime { background: rgba(200,249,77,0.12); color: var(--accent); }
.prod__icon--warm { background: rgba(255,138,61,0.14); color: var(--warm); }
.prod h3 { font-size: 1.45rem; margin-bottom: 0.6rem; }
.prod p { color: var(--muted); font-size: 1rem; }
.prod__tags { display: flex; gap: 0.5rem; margin-top: 1.2rem; }
.prod__tags span { font-size: 0.76rem; font-weight: 700; letter-spacing: 0.04em; padding: 0.32rem 0.75rem; border-radius: 999px; border: 1px solid var(--line-2); color: var(--muted); }

/* ============ FAQ ============ */
.faq { display: grid; gap: 0.8rem; }
.faq details { background: linear-gradient(180deg, var(--surface-1s), var(--bg-2)); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.4rem 1.4rem; transition: border-color 0.2s ease; }
.faq details[open] { border-color: var(--line-2); }
.faq summary { list-style: none; cursor: pointer; font-weight: 700; font-size: 1.08rem; padding: 1rem 0; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.6rem; font-weight: 400; transition: transform 0.25s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); padding-bottom: 1.2rem; max-width: 62ch; }

/* ============ CTA / CONTACTO ============ */
.cta__card {
  background:
    radial-gradient(80% 120% at 100% 0%, rgba(200,249,77,0.10), transparent 60%),
    linear-gradient(160deg, var(--surface-2), var(--surface-1s));
  border: 1px solid var(--line-2); border-radius: var(--radius-lg);
  padding: clamp(1.9rem, 4vw, 3.2rem); box-shadow: var(--shadow);
}
.contact { margin-top: 1.9rem; display: grid; gap: 1.15rem; }
.contact__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.15rem; }
.field--text label { font-size: 0.9rem; margin-bottom: 0.45rem; color: var(--muted); display: block; }
.field--text input, .field--text textarea { width: 100%; background: var(--bg); border: 1px solid var(--line-2); border-radius: var(--radius-sm); color: var(--text); padding: 0.85rem 1rem; font-family: inherit; font-size: 1rem; transition: border-color 0.2s ease, box-shadow 0.2s ease; }
.field--text input::placeholder, .field--text textarea::placeholder { color: var(--muted-2); }
.field--text input:focus, .field--text textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(200,249,77,0.12); }
.contact .note a { color: var(--accent); }

/* ============ FOOTER ============ */
.footer { border-top: 1px solid var(--line); padding-block: 2.8rem; background: var(--surface-1s); }
.footer__inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 1.5rem 2rem; align-items: start; }
.brand--footer { flex-direction: column; align-items: flex-start; gap: 0.7rem; }
.brand--footer p { color: var(--muted); font-size: 0.94rem; max-width: 40ch; }
.footer__links { display: flex; flex-wrap: wrap; gap: 1.3rem; color: var(--muted); font-weight: 600; font-size: 0.96rem; justify-content: flex-end; }
.footer__links a:hover { color: var(--accent); }
.footer__legal { grid-column: 1 / -1; color: var(--muted-2); font-size: 0.84rem; border-top: 1px solid var(--line); padding-top: 1.4rem; }

/* ============ SCROLL REVEAL ============ */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s cubic-bezier(0.22,1,0.36,1), transform 0.7s cubic-bezier(0.22,1,0.36,1); }
.reveal.in { opacity: 1; transform: none; }

/* ============ RESPONSIVE ============ */
@media (max-width: 960px) {
  .hero__grid { display: flex; flex-direction: column; }
  .hero__visual { order: -1; }
  .machine { width: min(66%, 270px); }
  .steps { grid-template-columns: 1fr 1fr; }
  .calc { grid-template-columns: 1fr; }
  .calc__result { position: static; }
  .products { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
  .footer__links { justify-content: flex-start; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3) { border-left: none; }
  .stat { border-top: 1px solid var(--line); }
  .stat:nth-child(-n+2) { border-top: none; }
}
@media (max-width: 720px) {
  .nav__links { position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; gap: 0; background: rgba(10,13,11,0.97); backdrop-filter: blur(16px); border-bottom: 1px solid var(--line); padding: 0.5rem 1.2rem 1.2rem; transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity 0.2s ease, transform 0.2s ease; }
  .nav__links.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav__links a { padding: 0.9rem 0; border-bottom: 1px solid var(--line); }
  .nav__toggle { display: flex; }
  /* El CTA "Quiero una máquina" queda visible en móvil junto al menú. */
}
@media (max-width: 620px) {
  body { font-size: 16.5px; }
  .formats, .benefits, .result__grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .contact__row { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .hero__cta .btn { flex: 1 1 auto; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
  .reveal, .reveal-hero > *, .hero__visual { opacity: 1 !important; transform: none !important; }
}