/* ============================================================
   Pulse Fitness — tema oscuro con acentos neón (lima + naranja)
   ============================================================ */

:root {
  --color-bg: #0a0a0a;
  --color-bg-alt: #131313;
  --color-card: #1a1a1a;
  --color-line: #2a2a2a;
  --color-text: #f2f2f2;
  --color-muted: #a3a3a3;
  --color-lime: #c6ff33;
  --color-orange: #ff5f1f;

  --font-display: 'Poppins', sans-serif;
  --font-mono: 'Space Mono', monospace;
  --max-width: 1180px;
  --radius: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-display);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}
h1, h2, h3 { font-weight: 800; line-height: 1.15; margin: 0 0 0.5em; }
p { color: var(--color-muted); margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.accent { color: var(--color-lime); }
.eyebrow { text-transform: uppercase; letter-spacing: 0.14em; font-size: 0.78rem; font-weight: 700; color: var(--color-orange); margin-bottom: 0.75em; }

/* scroll progress bar */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--color-lime), var(--color-orange));
  z-index: 999; transition: width 0.1s ease-out;
}

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.9em 1.7em; border-radius: 999px; font-weight: 700; font-size: 0.95rem;
  border: 2px solid transparent; cursor: pointer; transition: all 0.15s ease;
}
.btn-primary { background: var(--color-lime); color: #0a0a0a; }
.btn-primary:hover { background: #d9ff70; }
.btn-ghost { background: transparent; border-color: var(--color-text); color: var(--color-text); }
.btn-ghost:hover { background: var(--color-text); color: #0a0a0a; }
.btn-block { width: 100%; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 10, 10, 0.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; background: var(--color-lime); color: #0a0a0a;
  border-radius: 8px; font-weight: 800;
}
.brand-name { letter-spacing: 0.02em; }
.brand-name span { color: var(--color-orange); }
.main-nav { display: flex; align-items: center; gap: 28px; font-size: 0.92rem; font-weight: 600; }
.main-nav a:hover { color: var(--color-lime); }
.nav-cta { background: var(--color-orange); color: #0a0a0a !important; padding: 0.6em 1.3em; border-radius: 999px; }
.nav-cta:hover { background: #ff7a42; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--color-text); border-radius: 2px; }

/* hero */
.hero { position: relative; padding: 120px 0 100px; overflow: hidden; text-align: center; }
.hero-glow {
  position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(198,255,51,0.18) 0%, rgba(255,95,31,0.08) 45%, transparent 70%);
  filter: blur(20px);
}
.hero-inner { position: relative; max-width: 760px; margin: 0 auto; }
.hero h1 { font-size: clamp(2.2rem, 4.5vw, 3.4rem); }
.hero-lead { font-size: 1.1rem; max-width: 52ch; margin: 0 auto 2em; }
.hero-actions { display: flex; gap: 16px; justify-content: center; }

/* stats */
.stats { padding: 60px 0; border-top: 1px solid var(--color-line); border-bottom: 1px solid var(--color-line); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-card p { margin: 0.4em 0 0; font-size: 0.9rem; }
.stat-number, .stat-suffix { font-family: var(--font-mono); font-size: 2.4rem; color: var(--color-lime); font-weight: 700; }

/* sections */
section { padding: 100px 0; }
.section-head { max-width: 640px; margin: 0 auto 52px; text-align: center; }
.section-head h2 { font-size: clamp(1.7rem, 2.6vw, 2.3rem); }

/* classes */
.classes-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.class-card {
  background: var(--color-card); border: 1px solid var(--color-line); border-radius: var(--radius);
  padding: 30px; transition: transform 0.2s ease, border-color 0.2s ease;
}
.class-card:hover { transform: translateY(-4px); border-color: var(--color-lime); }
.class-icon { font-size: 2rem; margin-bottom: 12px; }
.class-card h3 { font-size: 1.1rem; margin-bottom: 0.4em; }
.class-card p { font-size: 0.92rem; margin: 0; }

/* plans */
.plans { background: var(--color-bg-alt); }
.plan-toggle { display: flex; align-items: center; justify-content: center; gap: 14px; margin-top: 24px; font-size: 0.92rem; font-weight: 600; color: var(--color-muted); }
.toggle-label.active { color: var(--color-text); }
.toggle-label em { color: var(--color-lime); font-style: normal; font-size: 0.8rem; }
.switch { width: 52px; height: 28px; border-radius: 999px; background: var(--color-line); border: none; position: relative; cursor: pointer; padding: 0; }
.switch-knob { position: absolute; top: 3px; left: 3px; width: 22px; height: 22px; border-radius: 50%; background: var(--color-lime); transition: transform 0.2s ease; }
.switch[aria-checked="true"] .switch-knob { transform: translateX(24px); }

.plans-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.plan-card {
  position: relative; background: var(--color-card); border: 1px solid var(--color-line); border-radius: var(--radius);
  padding: 32px; display: flex; flex-direction: column;
}
.plan-card.featured { border-color: var(--color-lime); box-shadow: 0 0 0 1px var(--color-lime); }
.plan-badge { position: absolute; top: -12px; right: 24px; background: var(--color-lime); color: #0a0a0a; font-size: 0.72rem; font-weight: 800; padding: 4px 10px; border-radius: 999px; }
.plan-price { font-family: var(--font-mono); font-size: 2rem; color: var(--color-lime); margin-bottom: 1.2em; }
.plan-price small { font-family: var(--font-display); font-size: 0.9rem; color: var(--color-muted); }
.plan-price .price-annual { display: none; }
body.annual .plan-price .price-monthly { display: none; }
body.annual .plan-price .price-annual { display: inline; }
.plan-card ul { flex: 1; margin-bottom: 1.6em; }
.plan-card li { font-size: 0.9rem; padding: 8px 0; border-bottom: 1px solid var(--color-line); color: var(--color-muted); }
.plan-card li:last-child { border-bottom: none; }

/* trainers */
.trainers-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.trainer-card { text-align: center; }
.trainer-photo { width: 110px; height: 110px; border-radius: 50%; margin: 0 auto 16px; background: linear-gradient(135deg, var(--color-orange), var(--color-lime)); }
.trainer-card h3 { font-size: 1.02rem; margin-bottom: 0.2em; }
.trainer-card p { font-size: 0.85rem; margin: 0; }

/* testimonials slider */
.testimonials { background: var(--color-bg-alt); }
.slider { max-width: 700px; margin: 0 auto; }
.slider-track { display: flex; overflow: hidden; }
.slide { min-width: 100%; margin: 0; background: var(--color-card); border: 1px solid var(--color-line); border-radius: var(--radius); padding: 36px; text-align: center; }
.slide p { font-size: 1.1rem; color: var(--color-text); margin-bottom: 1em; }
.slide footer { color: var(--color-lime); font-weight: 600; font-size: 0.9rem; }
.slider-controls { display: flex; align-items: center; justify-content: center; gap: 20px; margin-top: 20px; }
.slider-btn { background: var(--color-card); border: 1px solid var(--color-line); color: var(--color-text); width: 40px; height: 40px; border-radius: 50%; font-size: 1.3rem; cursor: pointer; }
.slider-btn:hover { border-color: var(--color-lime); color: var(--color-lime); }
.slider-dots { display: flex; gap: 8px; }
.slider-dots button { width: 8px; height: 8px; border-radius: 50%; border: none; background: var(--color-line); cursor: pointer; padding: 0; }
.slider-dots button.active { background: var(--color-lime); }

/* contact */
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.contact-form { background: var(--color-card); border: 1px solid var(--color-line); border-radius: var(--radius); padding: 32px; }
.form-row { margin-bottom: 18px; }
label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; }
input, select { width: 100%; padding: 0.75em 0.9em; border: 1px solid var(--color-line); border-radius: 6px; background: var(--color-bg); color: var(--color-text); font-family: inherit; }
input:focus, select:focus { outline: none; border-color: var(--color-lime); }
.form-status { margin-top: 14px; font-size: 0.9rem; font-weight: 600; color: var(--color-lime); }

/* footer */
.site-footer { border-top: 1px solid var(--color-line); padding: 56px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1.2fr 2fr; gap: 40px; padding-bottom: 40px; }
.footer-brand p { max-width: 32ch; font-size: 0.88rem; }
.footer-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.footer-links h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 14px; }
.footer-links a { display: block; font-size: 0.9rem; color: var(--color-muted); margin-bottom: 10px; }
.footer-links a:hover { color: var(--color-lime); }
.footer-bottom { padding: 20px 0; font-size: 0.8rem; color: var(--color-muted); text-align: center; border-top: 1px solid var(--color-line); }

/* back to top */
.back-to-top {
  position: fixed; bottom: 24px; right: 24px; width: 46px; height: 46px; border-radius: 50%;
  background: var(--color-lime); color: #0a0a0a; border: none; font-size: 1.2rem; cursor: pointer;
  opacity: 0; pointer-events: none; transition: opacity 0.2s ease, transform 0.2s ease; z-index: 90;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-3px); }

/* responsive */
@media (max-width: 960px) {
  .classes-grid { grid-template-columns: repeat(2, 1fr); }
  .plans-grid { grid-template-columns: 1fr; }
  .trainers-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-inner { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .main-nav {
    position: absolute; top: 74px; left: 0; right: 0; background: var(--color-bg);
    border-bottom: 1px solid var(--color-line); flex-direction: column; align-items: flex-start;
    gap: 0; padding: 12px 24px 20px; display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a { width: 100%; padding: 12px 0; border-bottom: 1px solid var(--color-line); }
  .nav-cta { margin-top: 12px; text-align: center; }
  .nav-toggle { display: flex; }
  .classes-grid, .trainers-grid { grid-template-columns: 1fr; }
  section { padding: 64px 0; }
  .hero { padding: 88px 0 56px; }
}