:root {
  --bg: #0e0f12;
  --bg-alt: #f7f7f5;
  --surface: #ffffff;
  --ink: #14151a;
  --ink-soft: #55585f;
  --line: #e7e6e2;
  --accent: #ff5a1f;
  --accent-ink: #ffffff;
  --accent-soft: #fff1ea;
  --radius: 18px;
  --shadow: 0 20px 45px -25px rgba(20, 21, 26, 0.35);
  --maxw: 1140px;
  --font-head: "Poppins", "Manrope", sans-serif;
  --font-body: "Manrope", sans-serif;

  /* vibrant accent palette used for background wash + blobs */
  --pop-orange: #ff5a1f;
  --pop-pink: #ff2d92;
  --pop-purple: #8b3dff;
  --pop-blue: #2e6bff;
  --pop-teal: #00d4b5;
  --pop-yellow: #ffc72c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-color: var(--bg-alt);
  background-image:
    radial-gradient(900px circle at 8% 0%, rgba(255, 45, 146, 0.20), transparent 55%),
    radial-gradient(1000px circle at 92% 8%, rgba(139, 61, 255, 0.22), transparent 55%),
    radial-gradient(850px circle at 12% 55%, rgba(0, 212, 181, 0.16), transparent 55%),
    radial-gradient(950px circle at 88% 60%, rgba(255, 90, 31, 0.18), transparent 55%),
    radial-gradient(800px circle at 15% 100%, rgba(46, 107, 255, 0.16), transparent 55%),
    radial-gradient(900px circle at 90% 100%, rgba(255, 199, 44, 0.16), transparent 55%);
  background-attachment: fixed;
  background-repeat: no-repeat;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background:
    radial-gradient(500px circle at 0% 0%, rgba(255, 90, 31, 0.35), transparent 70%),
    radial-gradient(500px circle at 100% 0%, rgba(139, 61, 255, 0.35), transparent 70%),
    rgba(14, 15, 18, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.logo span { color: var(--accent); }

.main-nav { display: flex; gap: 22px; flex-shrink: 0; }
.nav-link {
  color: rgba(255,255,255,0.75);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
  position: relative;
}
.nav-link.lang-switch {
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  color: #fff;
}
.nav-link.lang-switch:hover { border-color: var(--accent); color: var(--accent); }
.nav-link:hover, .nav-link.active { color: #fff; }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -8px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px; height: 36px;
  background: none; border: none; cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block; height: 2px; width: 100%;
  background: #fff; border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center 30%;
  transform: scale(1.02);
}
.hero-overlay {
  position: absolute; inset: 0;
  background:
    radial-gradient(900px circle at 85% 0%, rgba(139, 61, 255, 0.35), transparent 60%),
    radial-gradient(900px circle at 0% 100%, rgba(255, 90, 31, 0.30), transparent 60%),
    linear-gradient(180deg, rgba(10,10,12,0.75) 0%, rgba(10,10,12,0.55) 45%, rgba(10,10,12,0.92) 100%);
}
.hero-content {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 18px;
}
.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  font-weight: 700;
  line-height: 1.08;
  margin: 0 0 22px;
  letter-spacing: -0.02em;
  max-width: 18ch;
}
.hero-sub {
  font-size: 1.08rem;
  color: rgba(255,255,255,0.85);
  max-width: 46ch;
  margin: 0 0 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  border: 1.5px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { transform: translateY(-2px); background: #ff6e39; }
.btn-ghost { border-color: rgba(255,255,255,0.4); color: #fff; }
.btn-ghost:hover { border-color: #fff; transform: translateY(-2px); }

.scroll-cue {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 2px solid rgba(255,255,255,0.5);
  border-radius: 999px;
}
.scroll-cue span {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 8px;
  background: #fff;
  border-radius: 2px;
  transform: translateX(-50%);
  animation: cue 1.8s infinite ease-in-out;
}
@keyframes cue {
  0% { opacity: 1; top: 8px; }
  70% { opacity: 0; top: 20px; }
  100% { opacity: 0; top: 8px; }
}

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 12px;
  text-align: center;
}
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  margin: 0 0 18px;
}
.section-desc {
  text-align: center;
  color: var(--ink-soft);
  max-width: 62ch;
  margin: 0 auto 56px;
  font-size: 1.05rem;
}

/* ---------- Guide cards ---------- */
.section-guide {
  position: relative;
  background-color: var(--bg-alt);
  background-image:
    radial-gradient(750px circle at 4% 6%, rgba(255, 90, 31, 0.50), transparent 60%),
    radial-gradient(700px circle at 98% 18%, rgba(139, 61, 255, 0.48), transparent 60%),
    radial-gradient(750px circle at 92% 98%, rgba(0, 212, 181, 0.42), transparent 60%),
    radial-gradient(650px circle at 6% 92%, rgba(255, 45, 146, 0.35), transparent 60%);
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.guide-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.guide-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.guide-icon { font-size: 1.7rem; margin-bottom: 14px; }
.guide-card h3 {
  font-family: var(--font-head);
  font-size: 1.1rem;
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}
.guide-card p { margin: 0; color: var(--ink-soft); font-size: 0.95rem; }

.disclaimer {
  text-align: center;
  margin: 48px auto 0;
  max-width: 62ch;
  font-size: 0.88rem;
  color: var(--ink-soft);
  font-style: italic;
}

/* ---------- Categories ---------- */
.section-categories {
  position: relative;
  background-color: var(--surface);
  background-image:
    radial-gradient(800px circle at 98% 2%, rgba(255, 45, 146, 0.42), transparent 60%),
    radial-gradient(750px circle at 2% 35%, rgba(46, 107, 255, 0.38), transparent 60%),
    radial-gradient(800px circle at 96% 70%, rgba(255, 199, 44, 0.40), transparent 60%),
    radial-gradient(700px circle at 4% 100%, rgba(139, 61, 255, 0.32), transparent 60%);
}
.cat-list { display: flex; flex-direction: column; gap: 24px; }

.cat-block {
  scroll-margin-top: 90px;
  padding-bottom: 72px;
  border-bottom: 1px solid var(--line);
}
.cat-list .cat-block:last-child { border-bottom: none; padding-bottom: 0; }

.cat-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 40px;
}
.cat-card.reverse .cat-media { order: 2; }
.cat-card.reverse .cat-body { order: 1; }

.cat-media {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 4/3;
}
.cat-media img { width: 100%; height: 100%; object-fit: cover; }

.cat-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.cat-body h3 {
  font-family: var(--font-head);
  font-size: 1.9rem;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}
.cat-muscles {
  margin: 0 0 14px;
  color: var(--ink-soft);
}
.cat-muscles strong { color: var(--ink); }

.cat-intro {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
  line-height: 1.7;
}

/* ---------- Exercise grid ---------- */
.exercise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}
.exercise-card {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.exercise-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.exercise-media {
  aspect-ratio: 4/3;
  background: #eeede8;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.exercise-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 6px;
}
.exercise-media.photo { background: none; }
.exercise-media.photo img { object-fit: cover; padding: 0; }
.exercise-card h4 {
  font-family: var(--font-head);
  font-size: 1rem;
  margin: 16px 18px 8px;
  letter-spacing: -0.01em;
}
.exercise-card p {
  margin: 0 18px 18px;
  color: var(--ink-soft);
  font-size: 0.88rem;
  line-height: 1.6;
}

.cat-tip {
  background: var(--bg-alt);
  border-left: 3px solid var(--accent);
  padding: 14px 18px;
  border-radius: 0 12px 12px 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin: 0;
}
.cat-tip strong { color: var(--ink); }

/* ---------- FAQ ---------- */
.section-faq {
  position: relative;
  background-color: var(--bg-alt);
  background-image:
    radial-gradient(750px circle at 6% 2%, rgba(0, 212, 181, 0.45), transparent 60%),
    radial-gradient(700px circle at 96% 95%, rgba(255, 90, 31, 0.45), transparent 60%),
    radial-gradient(650px circle at 94% 10%, rgba(255, 45, 146, 0.30), transparent 60%);
}
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 6px 22px;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  padding: 16px 0;
  list-style: none;
  position: relative;
  padding-right: 30px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0; top: 14px;
  font-size: 1.3rem;
  color: var(--accent);
  transition: transform 0.2s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { margin: 0 0 18px; color: var(--ink-soft); }

/* ---------- Footer ---------- */
.site-footer {
  background:
    radial-gradient(600px circle at 8% 0%, rgba(0, 212, 181, 0.25), transparent 60%),
    radial-gradient(650px circle at 95% 100%, rgba(255, 45, 146, 0.25), transparent 60%),
    var(--bg);
  color: rgba(255,255,255,0.75);
  padding: 48px 0;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  align-items: flex-start;
}
.footer-brand p { margin: 10px 0 0; font-size: 0.9rem; color: rgba(255,255,255,0.55); }
.footer-credits { max-width: 480px; font-size: 0.85rem; }
.footer-credits p { margin: 0 0 8px; }
.footer-credits a { color: var(--accent); text-decoration: underline; }
.footer-note { color: rgba(255,255,255,0.45); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: 66px; left: 0; right: 0;
    background: rgba(14,15,18,0.98);
    flex-direction: column;
    padding: 12px 24px 24px;
    gap: 4px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }
  .main-nav.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav-link { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .nav-toggle { display: flex; }

  .cat-card, .cat-card.reverse {
    grid-template-columns: 1fr;
  }
  .cat-card.reverse .cat-media, .cat-card.reverse .cat-body { order: initial; }
  .cat-moves { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .section { padding: 64px 0; }
  .hero-actions { flex-direction: column; align-items: stretch; }
}