/* ==========================================================================
   VORTEX — Design System & Styles
   Portable Turbo Air Power — DTC premium tech gear
   ========================================================================== */

:root {
  /* Brand palette */
  --c-black: #0d0d0d;
  --c-graphite: #1a1a1a;
  --c-graphite-2: #232323;
  --c-line: #2e2e2e;
  --c-white: #ffffff;
  --c-off-white: #ededed;
  --c-mute: #9a9a9a;
  --c-yellow: #ffd600;
  --c-yellow-dim: #cfae00;
  --c-cyan: #00e5ff;

  /* Semantic */
  --bg: var(--c-black);
  --surface: var(--c-graphite);
  --surface-2: var(--c-graphite-2);
  --text: var(--c-white);
  --text-mute: var(--c-mute);
  --accent: var(--c-yellow);
  --accent-2: var(--c-cyan);
  --danger: #ff5252;
  --success: #35d07f;

  /* Type */
  --font-head: "Space Grotesk", "Inter Tight", Inter, system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  /* Layout */
  --container: 1240px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --nav-h: 72px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }
ul[class], ol[class] { list-style: none; margin: 0; padding: 0; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

@media (min-width: 900px) {
  .container { padding-inline: var(--space-7); }
}

section { position: relative; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-2);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--accent-2);
  display: inline-block;
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-7);
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 42px);
  margin-top: var(--space-3);
}
.section-head p {
  color: var(--text-mute);
  margin-top: var(--space-3);
  font-size: 16px;
}
.section-head.center { margin-inline: auto; text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 16px 28px;
  border-radius: 999px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: var(--c-black);
  box-shadow: 0 0 0 0 rgba(255, 214, 0, 0.5);
}
.btn-primary:hover {
  box-shadow: 0 8px 30px -6px rgba(255, 214, 0, 0.55);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--c-line);
}
.btn-ghost:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,0.25);
  color: var(--text);
}
.btn-outline:hover { border-color: var(--text); }

.btn-block { width: 100%; }
.btn-sm { padding: 11px 18px; font-size: 13px; }

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(13, 13, 13, 0.7);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.navbar.is-scrolled {
  border-bottom-color: var(--c-line);
  background: rgba(13, 13, 13, 0.92);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.logo .dot { color: var(--accent); }

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-6);
  font-size: 14px;
  font-weight: 500;
  color: var(--c-off-white);
}
.nav-links a { position: relative; padding: 4px 0; transition: color 0.2s; }
.nav-links a:hover { color: var(--accent-2); }

.nav-right { display: flex; align-items: center; gap: var(--space-4); }

.nav-cta { display: none; }

.burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  background: transparent;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.burger span {
  width: 18px;
  height: 2px;
  background: var(--text);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}
.burger.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.is-active span:nth-child(2) { opacity: 0; }
.burger.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  background: var(--c-black);
  z-index: 99;
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}
.mobile-menu.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.mobile-menu a {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 600;
  border-bottom: 1px solid var(--c-line);
  padding-bottom: var(--space-4);
}

@media (min-width: 900px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .burger { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  background:
    radial-gradient(1100px 550px at 85% -10%, rgba(0, 229, 255, 0.10), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(255, 214, 0, 0.08), transparent 60%),
    var(--c-black);
  overflow: hidden;
}
.hero .container {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}
@media (min-width: 980px) {
  .hero .container { grid-template-columns: 1fr 1fr; gap: var(--space-7); }
}

.hero-copy h1 {
  font-size: clamp(38px, 6.4vw, 68px);
  margin-top: var(--space-4);
}
.hero-copy h1 .accent { color: var(--accent); }
.hero-copy .sub {
  margin-top: var(--space-5);
  font-size: 18px;
  color: var(--text-mute);
  max-width: 460px;
}

.price-row {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.price-now {
  font-family: var(--font-head);
  font-size: 36px;
  font-weight: 700;
  color: var(--accent);
}
.price-old {
  font-size: 18px;
  color: var(--text-mute);
  text-decoration: line-through;
}
.price-badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-black);
  background: var(--accent-2);
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--c-line);
}
.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--text-mute);
}
.trust-item svg { flex-shrink: 0; color: var(--accent-2); }

/* Hero product visual (SVG placeholder — swap for real photography) */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 380px;
}
.hero-visual::before {
  content: "";
  position: absolute;
  width: 78%;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.18), transparent 70%);
  filter: blur(10px);
  animation: pulse-glow 4s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.06); }
}
.hero-visual .product-shot {
  position: relative;
  width: 100%;
  max-width: 420px;
  animation: float-y 5s ease-in-out infinite;
}
@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
/* ---------- Power strip ---------- */
.power-strip {
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  background: var(--c-graphite);
}
.power-strip .container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--c-line);
}
@media (min-width: 700px) {
  .power-strip .container { grid-template-columns: repeat(4, 1fr); }
}
.power-item {
  background: var(--c-graphite);
  padding: var(--space-5);
  text-align: center;
}
.power-item strong {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.4vw, 24px);
  color: var(--accent-2);
}
.power-item span {
  display: block;
  margin-top: var(--space-1);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-mute);
}

/* ---------- Generic section paddings ---------- */
.section { padding-block: var(--space-9); }
.section.tight { padding-block: var(--space-8); }
.section.dark { background: var(--c-black); }
.section.surface { background: var(--c-graphite); }

/* ---------- Problem/Solution ---------- */
.ps-grid {
  display: grid;
  gap: var(--space-6);
}
@media (min-width: 860px) {
  .ps-grid { grid-template-columns: 1fr 1fr; align-items: center; gap: var(--space-8); }
}
.ps-visual {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
.ps-tile {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  background: var(--c-graphite-2);
  border: 1px solid var(--c-line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-mute);
  position: relative;
  overflow: hidden;
}
.ps-tile svg { color: var(--accent-2); width: 28px; height: 28px; }
.ps-tile .lbl {
  position: absolute;
  bottom: 8px;
  left: 8px;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-mute);
}

.ps-copy h2 { font-size: clamp(28px, 4vw, 40px); margin-top: var(--space-3); }
.ps-copy p { color: var(--text-mute); margin-top: var(--space-4); max-width: 480px; }
.ps-list { margin-top: var(--space-6); display: flex; flex-direction: column; gap: var(--space-4); }
.ps-list li { display: flex; gap: var(--space-3); align-items: flex-start; font-size: 15px; }
.ps-list svg { color: var(--accent); flex-shrink: 0; margin-top: 2px; }

/* ---------- Product experience ---------- */
.pe-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .pe-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1100px) {
  .pe-grid { grid-template-columns: repeat(4, 1fr); }
}
.pe-card {
  background: var(--c-graphite);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}
.pe-card:hover { border-color: var(--accent-2); transform: translateY(-4px); }
.pe-card .pe-visual {
  aspect-ratio: 4/3;
  border-radius: var(--radius-md);
  background:
    radial-gradient(circle at 30% 20%, rgba(0,229,255,0.14), transparent 60%),
    var(--c-graphite-2);
  border: 1px dashed var(--c-line);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--accent-2);
}
.pe-card h3 { font-size: 16px; margin-bottom: var(--space-2); }
.pe-card p { font-size: 13px; color: var(--text-mute); }

.pe-visual-photo { border-style: solid; overflow: hidden; padding: 0; }
.pe-visual-photo picture, .pe-visual-photo img {
  width: 100%; height: 100%; display: block; object-fit: cover;
}

/* ---------- Specs ---------- */
.spec-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 700px) {
  .spec-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1100px) {
  .spec-grid { grid-template-columns: repeat(4, 1fr); }
}
.spec-card {
  background: var(--c-graphite-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}
.spec-card svg { color: var(--accent-2); margin-bottom: var(--space-4); }
.spec-card .val {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
}
.spec-card .lbl {
  margin-top: var(--space-1);
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: 0.03em;
}
.spec-card.tbd { border-style: dashed; }
.spec-card.tbd .val { color: var(--text-mute); font-size: 14px; }

/* ---------- Video / UGC ---------- */
.video-wrap {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}
@media (min-width: 900px) {
  .video-wrap { grid-template-columns: 0.8fr 1.2fr; }
}
.ugc-gallery {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}
.video-frame {
  position: relative;
  aspect-ratio: 2/3;
  width: 100%;
  max-width: 170px;
  margin-inline: auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: linear-gradient(160deg, var(--c-graphite-2), var(--c-black));
  display: flex;
  align-items: center;
  justify-content: center;
}
.video-frame video, .video-frame img {
  width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0;
}
.video-copy ul { margin-top: var(--space-5); display: flex; flex-direction: column; gap: var(--space-4); }
.video-copy li { display: flex; gap: var(--space-3); font-size: 15px; }
.video-copy svg { color: var(--accent); flex-shrink: 0; }

/* ---------- Comparison ---------- */
.compare-table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--c-line); }
table.compare {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
  background: var(--c-graphite);
}
table.compare th, table.compare td {
  padding: var(--space-4) var(--space-5);
  text-align: center;
  border-bottom: 1px solid var(--c-line);
  font-size: 14px;
}
table.compare th:first-child, table.compare td:first-child { text-align: left; color: var(--text-mute); font-weight: 500; }
table.compare thead th {
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding-top: var(--space-5);
}
table.compare thead th.brand { color: var(--accent); }
table.compare tbody tr:last-child td { border-bottom: none; }
table.compare td.yes { color: var(--success); }
table.compare td.no { color: var(--text-mute); }
table.compare td svg { display: inline-block; vertical-align: middle; }
.brand-col { background: rgba(255, 214, 0, 0.04); }

/* ---------- Uses ---------- */
.uses-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 620px) { .uses-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .uses-grid { grid-template-columns: repeat(3, 1fr); } }
.use-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  border: 1px solid var(--c-line);
  background: linear-gradient(150deg, var(--c-graphite-2), var(--c-black));
  display: flex;
  align-items: flex-end;
  padding: var(--space-5);
}
.use-card::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 20%, rgba(0,229,255,0.12), transparent 55%);
}
.use-card .use-icon {
  position: absolute; top: var(--space-4); left: var(--space-4);
  color: var(--accent-2);
}
.use-card h3 { position: relative; font-size: 20px; }
.use-card p { position: relative; font-size: 13px; color: var(--text-mute); margin-top: var(--space-1); }

.use-card.has-photo .use-photo {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 0;
}
.use-card.has-photo::before {
  z-index: 1;
  background: linear-gradient(180deg, rgba(13,13,13,0.15) 0%, rgba(13,13,13,0.85) 100%);
}
.use-card.has-photo .use-icon,
.use-card.has-photo h3,
.use-card.has-photo p {
  position: relative;
  z-index: 2;
}

/* ---------- Social proof ---------- */
.reviews-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) { .reviews-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .reviews-grid { grid-template-columns: repeat(3, 1fr); } }
.review-card {
  background: var(--c-graphite);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.stars { color: var(--accent); font-size: 14px; letter-spacing: 2px; }
.review-card p.quote { margin-top: var(--space-3); font-size: 14px; color: var(--c-off-white); }
.review-author {
  display: flex; align-items: center; gap: var(--space-3);
  margin-top: var(--space-5);
}
.avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 700; font-size: 13px; color: var(--c-black);
}
.review-author .name { font-size: 13px; font-weight: 600; }
.review-author .meta { font-size: 11px; color: var(--text-mute); }
.demo-note {
  margin-top: var(--space-7);
  text-align: center;
  font-size: 12px;
  color: var(--text-mute);
  border: 1px dashed var(--c-line);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

/* ---------- Offer ---------- */
.offer-box {
  background: var(--c-graphite);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
  display: grid;
  gap: var(--space-7);
}
@media (min-width: 900px) {
  .offer-box { grid-template-columns: 0.9fr 1.1fr; }
}
.offer-visual {
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  background: radial-gradient(circle at 50% 30%, rgba(255,214,0,0.10), transparent 60%), var(--c-graphite-2);
  border: 1px solid var(--c-line);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-mute);
  position: relative;
}
.offer-visual picture,
.offer-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.bundle-list { display: flex; flex-direction: column; gap: var(--space-3); margin-top: var(--space-6); }
.bundle-opt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: var(--c-graphite-2);
}
.bundle-opt input { accent-color: var(--accent); width: 18px; height: 18px; }
.bundle-opt.is-active { border-color: var(--accent); background: rgba(255,214,0,0.06); }
.bundle-opt .bundle-left { display: flex; align-items: center; gap: var(--space-3); }
.bundle-opt .bundle-title { font-weight: 600; font-size: 14px; }
.bundle-opt .bundle-sub { font-size: 12px; color: var(--text-mute); }
.bundle-opt .bundle-price { text-align: right; font-family: var(--font-head); font-weight: 700; }
.bundle-opt .bundle-price .old { display: block; font-size: 11px; color: var(--text-mute); text-decoration: line-through; font-weight: 400; font-family: var(--font-body); }
.badge-popular {
  font-size: 10px; font-weight: 700; letter-spacing: 0.04em;
  background: var(--accent); color: var(--c-black);
  padding: 2px 8px; border-radius: 999px; text-transform: uppercase;
}

.offer-total {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--c-line);
}
.offer-total .label { font-size: 13px; color: var(--text-mute); }
.offer-total .amount { font-family: var(--font-head); font-size: 28px; font-weight: 700; color: var(--accent); }

.qty-row { display: flex; align-items: center; gap: var(--space-4); margin-top: var(--space-5); }
.qty-stepper { display: flex; align-items: center; border: 1px solid var(--c-line); border-radius: 999px; }
.qty-stepper button {
  width: 38px; height: 38px; background: transparent; border: none; color: var(--text);
  font-size: 18px; cursor: pointer;
}
.qty-stepper span { width: 32px; text-align: center; font-weight: 600; }

.offer-cta { margin-top: var(--space-6); }
.offer-trust { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-5); font-size: 12px; color: var(--text-mute); }
.offer-trust span { display: flex; align-items: center; gap: 6px; }

.add-feedback {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--success);
  opacity: 0; transform: translateY(4px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
  margin-top: var(--space-3);
}
.add-feedback.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: var(--space-3); max-width: 760px; margin-inline: auto; }
.faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  background: var(--c-graphite);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5);
  background: transparent;
  border: none;
  text-align: left;
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.faq-q .plus { color: var(--accent-2); transition: transform 0.3s var(--ease); flex-shrink: 0; }
.faq-item.is-open .faq-q .plus { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s var(--ease);
}
.faq-a p { padding: 0 var(--space-5) var(--space-5); color: var(--text-mute); font-size: 14px; }

/* ---------- Trust / guarantee ---------- */
.trust-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 700px) { .trust-grid { grid-template-columns: repeat(4, 1fr); } }
.trust-card {
  text-align: center;
  padding: var(--space-6) var(--space-4);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  background: var(--c-graphite-2);
}
.trust-card svg { color: var(--accent-2); margin-bottom: var(--space-3); }
.trust-card h3 { font-size: 14px; }
.trust-card p { font-size: 12px; color: var(--text-mute); margin-top: var(--space-1); }

/* ---------- Final CTA ---------- */
.final-cta {
  background:
    radial-gradient(900px 500px at 50% 0%, rgba(255,214,0,0.10), transparent 60%),
    var(--c-black);
  text-align: center;
  padding-block: var(--space-9);
}
.final-cta h2 {
  font-size: clamp(32px, 6vw, 56px);
}
.final-cta p { color: var(--text-mute); margin-top: var(--space-4); font-size: 16px; }
.final-cta .btn { margin-top: var(--space-6); }
.final-visual {
  margin-top: var(--space-8);
  max-width: 220px;
  margin-inline: auto;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid var(--c-line);
  background: radial-gradient(circle at 50% 50%, rgba(0,229,255,0.06), transparent 70%), var(--c-graphite);
  box-shadow: 0 0 70px -12px rgba(0, 229, 255, 0.4), inset 0 0 30px -10px rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
}
.final-visual svg { display: block; overflow: visible; filter: drop-shadow(0 0 8px rgba(0, 229, 255, 0.35)); }
.vortex-spin { transform-origin: 120px 120px; animation: vortex-rotate 9s linear infinite; }
.vortex-spin-rev { transform-origin: 120px 120px; animation: vortex-rotate 13s linear infinite reverse; }
@keyframes vortex-rotate {
  to { transform: rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
  .vortex-spin, .vortex-spin-rev { animation: none; }
}

/* ---------- Footer ---------- */
footer.site-footer {
  border-top: 1px solid var(--c-line);
  padding-block: var(--space-8);
  background: var(--c-graphite);
}
.footer-grid {
  display: grid;
  gap: var(--space-7);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
}
.footer-grid h4 {
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin-bottom: var(--space-4);
}
.footer-grid ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-grid a { font-size: 14px; color: var(--c-off-white); }
.footer-grid a:hover { color: var(--accent-2); }
.footer-brand p { color: var(--text-mute); font-size: 13px; margin-top: var(--space-3); max-width: 300px; }
.footer-bottom {
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--c-line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 12px;
  color: var(--text-mute);
}

/* ---------- Sticky mobile purchase bar ---------- */
.sticky-buy {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 90;
  background: rgba(13,13,13,0.94);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--c-line);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  transform: translateY(100%);
  transition: transform 0.3s var(--ease);
}
.sticky-buy.is-visible { transform: translateY(0); }
.sticky-buy .sb-info { display: flex; flex-direction: column; }
.sticky-buy .sb-name { font-family: var(--font-head); font-size: 13px; font-weight: 700; }
.sticky-buy .sb-price { font-size: 12px; color: var(--accent); font-weight: 700; }
.sticky-buy .btn { padding: 12px 22px; font-size: 13px; }

@media (min-width: 900px) {
  .sticky-buy { display: none; }
}

/* ---------- Nav active state ---------- */
.nav-links a.is-active,
.mobile-menu a.is-active {
  color: var(--accent-2);
}
.nav-links a.is-active { border-bottom: 2px solid var(--accent-2); padding-bottom: 2px; }

/* ---------- Page hero (interior pages) ---------- */
.page-hero {
  padding-top: var(--space-8);
  padding-bottom: var(--space-7);
  background:
    radial-gradient(900px 400px at 85% -10%, rgba(0, 229, 255, 0.10), transparent 60%),
    var(--c-black);
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(32px, 5.5vw, 52px);
  margin-top: var(--space-3);
}
.page-hero p {
  color: var(--text-mute);
  margin-top: var(--space-4);
  max-width: 560px;
  margin-inline: auto;
  font-size: 16px;
}
.page-hero .section-head { margin-bottom: 0; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--text-mute);
  margin-bottom: var(--space-6);
}
.breadcrumb a { color: var(--text-mute); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--accent-2); }
.breadcrumb .sep { color: var(--c-line); }
.breadcrumb .current { color: var(--text); }

/* ---------- Product gallery ---------- */
.gallery-wrap {
  display: grid;
  gap: var(--space-4);
}
.gallery-main {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: var(--c-graphite);
}
.gallery-main img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: opacity 0.2s var(--ease);
}
.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-3);
}
.gallery-thumb {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--c-line);
  background: var(--c-graphite);
  cursor: pointer;
  padding: 0;
  transition: border-color 0.2s var(--ease);
}
.gallery-thumb.is-active { border-color: var(--accent-2); }
.gallery-thumb img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}

/* ---------- Product page layout ---------- */
.product-top {
  display: grid;
  gap: var(--space-7);
}
@media (min-width: 940px) {
  .product-top { grid-template-columns: 1.05fr 0.95fr; align-items: start; }
}
.product-info h1 {
  font-size: clamp(28px, 4vw, 40px);
  margin-top: var(--space-2);
}
.product-info .sub {
  color: var(--text-mute);
  margin-top: var(--space-3);
  font-size: 15px;
}
.product-info .price-row { margin-top: var(--space-5); }

/* ---------- Steps (Cómo funciona) ---------- */
.steps-list {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
  counter-reset: step;
}
@media (min-width: 700px) { .steps-list { grid-template-columns: repeat(2, 1fr); } }
.step-card {
  position: relative;
  background: var(--c-graphite);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  counter-increment: step;
}
.step-card::before {
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(0,229,255,0.1);
  border: 1px solid var(--accent-2);
  color: var(--accent-2);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: var(--space-4);
}
.step-card h3 { font-size: 18px; }
.step-card p { color: var(--text-mute); margin-top: var(--space-2); font-size: 14px; }
.step-card .step-photo {
  margin-top: var(--space-4);
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16/10;
  border: 1px solid var(--c-line);
}
.step-card .step-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ---------- Use blocks (Usos page, full detail) ---------- */
.use-block-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}
.use-block {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}
@media (min-width: 860px) {
  .use-block { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
  .use-block.is-reversed .use-block-visual { order: 2; }
}
.use-block-visual {
  aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: linear-gradient(150deg, var(--c-graphite-2), var(--c-black));
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-2);
}
.use-block-visual img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.use-block-copy .use-icon-badge {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(0,229,255,0.08);
  border: 1px solid var(--c-line);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-2);
  margin-bottom: var(--space-4);
}
.use-block-copy h2 { font-size: clamp(24px, 3.4vw, 32px); }
.use-block-row { margin-top: var(--space-5); display: flex; gap: var(--space-3); }
.use-block-row .lbl { font-family: var(--font-head); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-mute); min-width: 90px; padding-top: 2px; }
.use-block-row p { font-size: 14px; color: var(--c-off-white); }
.use-block-row + .use-block-row { margin-top: var(--space-3); }
.use-block-copy .btn { margin-top: var(--space-6); }

/* ---------- FAQ categories ---------- */
.faq-category { margin-bottom: var(--space-8); }
.faq-category:last-child { margin-bottom: 0; }
.faq-category h2 {
  font-size: 20px;
  margin-bottom: var(--space-5);
  max-width: 760px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.faq-category h2 .cat-num {
  font-family: var(--font-head);
  font-size: 13px;
  color: var(--c-black);
  background: var(--accent-2);
  width: 26px; height: 26px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
}

/* ---------- Order summary (Comprar page) ---------- */
.order-grid {
  display: grid;
  gap: var(--space-7);
}
@media (min-width: 900px) {
  .order-grid { grid-template-columns: 1fr 1fr; align-items: start; }
}
.order-card {
  background: var(--c-graphite);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.order-product {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--c-line);
}
.order-product .order-thumb {
  width: 80px; height: 80px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--c-line);
  flex-shrink: 0;
}
.order-product .order-thumb img { width: 100%; height: 100%; object-fit: cover; }
.order-product h3 { font-size: 16px; }
.order-product p { font-size: 13px; color: var(--text-mute); margin-top: var(--space-1); }

.order-line {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-3) 0;
  font-size: 14px;
}
.order-line .k { color: var(--text-mute); }
.order-line .v { font-weight: 600; }
.order-line.discount .v { color: var(--success); }
.order-line.total {
  margin-top: var(--space-3);
  padding-top: var(--space-5);
  border-top: 1px solid var(--c-line);
  font-size: 16px;
}
.order-line.total .v { font-family: var(--font-head); font-size: 24px; color: var(--accent); }

.order-note {
  margin-top: var(--space-5);
  font-size: 12px;
  color: var(--text-mute);
  border: 1px dashed var(--c-line);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  text-align: center;
}
.order-note.is-success {
  border-color: var(--success);
  color: var(--success);
  border-style: solid;
  display: none;
}
.order-note.is-success.is-visible { display: block; }

/* ---------- Forms (Contact) ---------- */
.form-grid {
  display: grid;
  gap: var(--space-5);
}
@media (min-width: 640px) {
  .form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
}
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field label { font-size: 13px; font-weight: 600; color: var(--c-off-white); }
.field input, .field select, .field textarea {
  background: var(--c-graphite-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 14px;
  color: var(--text);
  transition: border-color 0.2s var(--ease);
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent-2);
}
.field input:invalid:not(:placeholder-shown) { border-color: var(--danger); }

/* Focus visibility for keyboard nav across interactive elements */
a:focus-visible, button:focus-visible, input:focus-visible, .gallery-thumb:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

/* ---------- Legal / prose pages ---------- */
.prose { max-width: 760px; margin-inline: auto; }
.prose h2 { font-size: 22px; margin-top: var(--space-8); }
.prose h2:first-child { margin-top: 0; }
.prose p { color: var(--text-mute); margin-top: var(--space-4); font-size: 15px; }
.prose ul { margin-top: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); }
.prose li { font-size: 14px; color: var(--text-mute); padding-left: var(--space-4); position: relative; }
.prose li::before { content: "—"; position: absolute; left: 0; color: var(--c-line); }
.prose .placeholder-notice {
  margin-top: var(--space-6);
  padding: var(--space-5);
  border: 1px dashed var(--c-line);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-mute);
}

/* ---------- Scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0 !important; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
@media (max-width: 899px) {
  body.has-sticky-buy { padding-bottom: 76px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}