/* =========================================================
   BRILLIA DENTAL — Premium landing
   Dark + violet/cyan mesh gradients · Fraunces display + Inter
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; }

:root {
  /* palette — dark default */
  --bg: #0a0a0f;
  --bg-elev: #111118;
  --surface: #15151d;
  --line: rgba(255,255,255,.08);
  --text: #f2f0eb;
  --text-dim: rgba(242,240,235,.62);
  --text-mute: rgba(242,240,235,.42);
  --accent: #c4b5fd;     /* violet */
  --accent-2: #67e8f9;   /* cyan */
  --accent-3: #f0abfc;   /* pink */
  --glass: rgba(15,15,22,.55);
  --shadow: 0 20px 60px -20px rgba(0,0,0,.6);

  /* typography */
  --font-display: "Fraunces", "Times New Roman", serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  /* sizes */
  --container: 1240px;
  --pad-x: clamp(20px, 4vw, 48px);
  --pad-y: clamp(80px, 12vw, 160px);
  --radius: 18px;
  --radius-sm: 12px;
}

[data-theme="light"] {
  --bg: #f8f6f1;
  --bg-elev: #ffffff;
  --surface: #ffffff;
  --line: rgba(15,15,22,.08);
  --text: #0f0f16;
  --text-dim: rgba(15,15,22,.62);
  --text-mute: rgba(15,15,22,.42);
  --accent: #6d28d9;
  --accent-2: #0891b2;
  --accent-3: #be185d;
  --glass: rgba(248,246,241,.72);
  --shadow: 0 20px 60px -20px rgba(15,15,22,.18);
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
  transition: background .5s ease, color .5s ease;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

::selection { background: var(--accent); color: #0a0a0f; }

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

/* ------------------- LOADER ------------------- */
.loader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: grid; place-items: center;
  transition: opacity .5s ease, visibility .5s;
}
.loader.is-done { opacity: 0; visibility: hidden; }
.loader__inner { display: flex; align-items: center; gap: 14px; }
.loader__b {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 300;
  background: linear-gradient(120deg, var(--accent), var(--accent-3), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: pulse 1.4s ease-in-out infinite;
}
.loader__bar {
  width: 120px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  background-size: 200% 100%;
  animation: slide 1.4s linear infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1);} 50% {opacity:.7; transform: scale(.97);} }
@keyframes slide { 0% { background-position: 200% 0;} 100% { background-position: -200% 0;} }

/* ------------------- CURSOR ------------------- */
.cursor {
  position: fixed;
  top: 0; left: 0;
  width: 14px; height: 14px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: width .25s ease, height .25s ease, background .25s ease, border-color .25s ease;
  mix-blend-mode: difference;
}
.cursor.is-grow { width: 56px; height: 56px; background: var(--accent); border-color: transparent;}
@media (hover: none) { .cursor { display: none; } }

/* ------------------- NAV ------------------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px var(--pad-x);
  transition: background .35s ease, backdrop-filter .35s ease, padding .3s ease, border-color .35s;
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: var(--glass);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom-color: var(--line);
  padding: 12px var(--pad-x);
}
.nav__brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 22px;
  letter-spacing: -.01em;
}
.nav__brand em { font-style: italic; color: var(--accent); font-weight: 300; }
.nav__links {
  display: flex; gap: 30px;
  font-size: 14px;
  color: var(--text-dim);
}
.nav__links a { position: relative; transition: color .25s; }
.nav__links a:hover { color: var(--text); }
.nav__links a::after {
  content: ''; position: absolute; left: 0; bottom: -6px; width: 0; height: 1px;
  background: var(--accent);
  transition: width .35s ease;
}
.nav__links a:hover::after { width: 100%; }

.nav__actions { display: flex; align-items: center; gap: 10px; }
.theme-toggle {
  width: 38px; height: 38px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  display: grid; place-items: center;
  cursor: pointer;
  transition: border-color .25s, transform .25s;
}
.theme-toggle:hover { border-color: var(--accent); transform: rotate(20deg); }
.theme-toggle__moon { display: none; }
[data-theme="dark"] .theme-toggle__sun,
:root:not([data-theme="light"]) .theme-toggle__sun { display: block; }
[data-theme="dark"] .theme-toggle__moon { display: none; }
[data-theme="light"] .theme-toggle__sun { display: none; }
[data-theme="light"] .theme-toggle__moon { display: block; }

.nav__burger {
  display: none; flex-direction: column; gap: 5px;
  width: 38px; height: 38px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  padding: 0;
  align-items: center; justify-content: center;
}
.nav__burger span { display: block; width: 16px; height: 1px; background: var(--text); transition: transform .3s ease, opacity .2s; }
.nav.is-open .nav__burger span:nth-child(1) { transform: translateY(3px) rotate(45deg); }
.nav.is-open .nav__burger span:nth-child(2) { transform: translateY(-3px) rotate(-45deg); }

/* ------------------- BUTTONS ------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -.005em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .25s, background .25s, color .25s, border-color .25s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary {
  background: var(--text);
  color: var(--bg);
}
.btn--primary:hover { background: var(--accent); color: #0a0a0f; }
.btn--ghost {
  border-color: var(--line);
  color: var(--text);
  background: transparent;
}
.btn--ghost:hover { border-color: var(--text); }
.btn--block { width: 100%; }

/* ------------------- HERO ------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px var(--pad-x) 80px;
  overflow: hidden;
}
.hero__mesh {
  position: absolute; inset: 0;
  pointer-events: none;
  z-index: 0;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .85;
  will-change: transform;
}
.blob--a {
  width: 600px; height: 600px;
  background: radial-gradient(circle at 30% 30%, #6d28d9, transparent 60%);
  top: -120px; left: -100px;
  animation: floatA 18s ease-in-out infinite;
}
.blob--b {
  width: 500px; height: 500px;
  background: radial-gradient(circle at 60% 50%, #06b6d4, transparent 65%);
  top: 30%; right: -120px;
  animation: floatB 22s ease-in-out infinite;
}
.blob--c {
  width: 700px; height: 700px;
  background: radial-gradient(circle at 50% 50%, #ec489955, transparent 70%);
  bottom: -250px; left: 30%;
  animation: floatC 26s ease-in-out infinite;
}
@keyframes floatA { 0%,100% { transform: translate(0,0) scale(1);} 50% { transform: translate(80px, 60px) scale(1.1);} }
@keyframes floatB { 0%,100% { transform: translate(0,0) scale(1);} 50% { transform: translate(-60px, 40px) scale(1.15);} }
@keyframes floatC { 0%,100% { transform: translate(0,0) scale(1);} 50% { transform: translate(40px, -50px) scale(.95);} }

.grain {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .35 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='.6'/></svg>");
  opacity: .12;
  mix-blend-mode: overlay;
  pointer-events: none;
}

.hero__inner {
  position: relative; z-index: 1;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
}

.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--line);
  padding: 8px 14px;
  border-radius: 999px;
  margin: 0 0 32px;
  background: var(--glass);
  backdrop-filter: blur(10px);
}
.dot {
  width: 6px; height: 6px;
  border-radius: 999px;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34,197,94,.2);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink { 50% { opacity: .4; } }

.hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(56px, 11vw, 168px);
  line-height: .92;
  letter-spacing: -.035em;
  margin: 0 0 28px;
}
.hero__title em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
  background: linear-gradient(110deg, var(--accent), var(--accent-3), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.word { display: inline-block; overflow: hidden; vertical-align: top; }
.word > span { display: inline-block; transform: translateY(105%); }

.hero__lede {
  font-size: clamp(17px, 1.4vw, 20px);
  max-width: 560px;
  color: var(--text-dim);
  margin: 0 0 42px;
}
.hero__lede em { color: var(--text); font-style: normal; border-bottom: 1px solid var(--accent); }

.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 0 0 60px; }

.hero__proof {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--text-dim);
  font-size: 13px;
}
.avatars { display: flex; }
.avatars img {
  width: 40px; height: 40px;
  border-radius: 999px;
  border: 2px solid var(--bg);
  margin-left: -10px;
  object-fit: cover;
}
.avatars img:first-child { margin-left: 0; }
.stars { color: #fbbf24; letter-spacing: .15em; font-size: 14px; line-height: 1; }

.hero__scroll {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--text-mute);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.hero__scroll svg line {
  stroke-dasharray: 40;
  stroke-dashoffset: 40;
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine { 0% { stroke-dashoffset: 40; } 50% { stroke-dashoffset: 0; } 100% { stroke-dashoffset: -40; } }

/* ------------------- MARQUEE ------------------- */
.marquee {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 22px 0;
  overflow: hidden;
  background: var(--bg-elev);
}
.marquee__track {
  display: inline-flex;
  align-items: center;
  gap: 50px;
  white-space: nowrap;
  animation: marquee 40s linear infinite;
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(20px, 3vw, 32px);
  letter-spacing: -.01em;
}
.marquee__dot { color: var(--accent); font-size: 14px; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ------------------- SHARED HEADINGS ------------------- */
.eyebrow {
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin: 0 0 22px;
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow::before {
  content: '';
  width: 24px; height: 1px;
  background: var(--accent);
}
.eyebrow.center { display: flex; justify-content: center; }
.h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(36px, 5.5vw, 80px);
  line-height: 1;
  letter-spacing: -.025em;
  margin: 0;
}
.h2 em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}
.center { text-align: center; }

/* ------------------- STATS ------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 60px;
  padding: var(--pad-y) var(--pad-x);
  align-items: start;
}
.stat__num {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(60px, 9vw, 128px);
  line-height: .9;
  letter-spacing: -.04em;
  background: linear-gradient(180deg, var(--text), var(--text-dim));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 14px;
}
.stat p { font-size: 15px; color: var(--text-dim); margin: 0; max-width: 280px; }

/* ------------------- PROBLEM ------------------- */
.problem {
  padding: var(--pad-y) var(--pad-x);
  border-top: 1px solid var(--line);
}
.problem__head { max-width: 680px; margin-bottom: 80px; }
.problem__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.problem__card {
  background: var(--bg);
  padding: 40px 36px;
  display: flex; flex-direction: column; gap: 14px;
  transition: background .35s ease;
  min-height: 240px;
}
.problem__card:hover { background: var(--bg-elev); }
.problem__num {
  font-family: var(--font-display);
  font-weight: 300;
  font-style: italic;
  font-size: 18px;
  color: var(--accent);
}
.problem__card h3 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.1;
  margin: 0;
  letter-spacing: -.015em;
}
.problem__card p { color: var(--text-dim); margin: 0; }

/* ------------------- TREATMENTS ------------------- */
.treatments { padding: var(--pad-y) 0; border-top: 1px solid var(--line); }
.treatments__head { margin-bottom: 70px; }
.treatments__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}
.treatment {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elev);
  transition: transform .5s cubic-bezier(.2,.8,.2,1), border-color .35s;
  cursor: pointer;
}
.treatment:hover { transform: translateY(-6px); border-color: var(--accent); }
.treatment__media {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--surface);
}
.treatment__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 1s cubic-bezier(.2,.8,.2,1);
}
.treatment:hover .treatment__media img { transform: scale(1.05); }
.treatment__body { padding: 28px 30px; }
.treatment__body h3 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 2.4vw, 32px);
  margin: 0 0 10px;
  letter-spacing: -.02em;
}
.treatment__body p { color: var(--text-dim); margin: 0 0 16px; }
.treatment__meta {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
}

/* ------------------- PROCESS ------------------- */
.process {
  padding: var(--pad-y) 0;
  border-top: 1px solid var(--line);
  background: var(--bg-elev);
}
.process__head { margin-bottom: 70px; }
.process__steps { display: grid; gap: 0; }
.process__step {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 40px;
  padding: 50px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.process__step:last-child { border-bottom: 1px solid var(--line); }
.process__num {
  font-family: var(--font-display);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(50px, 6vw, 80px);
  line-height: 1;
  color: var(--accent);
  letter-spacing: -.03em;
}
.process__step h3 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(28px, 3.4vw, 44px);
  margin: 0 0 14px;
  letter-spacing: -.02em;
}
.process__step p { color: var(--text-dim); font-size: 17px; max-width: 620px; margin: 0; }

/* ------------------- TESTIMONIALS ------------------- */
.testimonials {
  padding: var(--pad-y) 0;
  border-top: 1px solid var(--line);
  text-align: center;
}
.testimonials .h2 { margin: 0 auto 70px; max-width: 16ch; }
.testi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  text-align: left;
}
.testi {
  padding: 36px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
  display: flex; flex-direction: column; gap: 24px;
}
.testi__quote {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(18px, 1.7vw, 22px);
  line-height: 1.35;
  margin: 0;
  letter-spacing: -.01em;
}
.testi footer { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.testi footer img { width: 44px; height: 44px; border-radius: 999px; object-fit: cover; }
.testi footer strong { display: block; font-size: 14px; }
.testi footer span { font-size: 12px; color: var(--text-mute); }

/* ------------------- PRICING ------------------- */
.pricing { padding: var(--pad-y) 0; border-top: 1px solid var(--line); }
.pricing__head { text-align: center; margin-bottom: 70px; max-width: 720px; margin-inline: auto; }
.pricing__head .eyebrow { justify-content: center; display: inline-flex; }
.pricing__lede { color: var(--text-dim); margin-top: 16px; }

.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.plan {
  position: relative;
  display: flex; flex-direction: column;
  padding: 40px 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
  transition: transform .35s, border-color .35s;
}
.plan:hover { transform: translateY(-4px); }
.plan--featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(196,181,253,.07), transparent 70%), var(--bg-elev);
}
.plan__badge {
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #0a0a0f;
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 999px;
  font-weight: 600;
}
.plan header { margin-bottom: 24px; }
.plan h3 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 28px;
  margin: 0 0 8px;
  letter-spacing: -.015em;
}
.plan header p { font-size: 14px; color: var(--text-dim); margin: 0; }
.plan__price {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 60px;
  line-height: 1;
  margin: 0 0 28px;
  letter-spacing: -.03em;
  display: flex; align-items: baseline; gap: 6px;
}
.plan__cur { font-size: 14px; color: var(--text-mute); font-family: var(--font-body); }
.plan__sub { font-size: 13px; color: var(--text-dim); font-family: var(--font-body); }
.plan ul { list-style: none; padding: 0; margin: 0 0 30px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.plan li {
  font-size: 14px;
  color: var(--text-dim);
  padding-left: 22px;
  position: relative;
}
.plan li::before {
  content: '+';
  position: absolute; left: 0; top: 0;
  color: var(--accent);
}

/* ------------------- FAQ ------------------- */
.faq { padding: var(--pad-y) 0; border-top: 1px solid var(--line); background: var(--bg-elev); }
.faq__head { max-width: 720px; margin-bottom: 60px; }
.faq__list {
  display: flex;
  flex-direction: column;
}
.faq__item {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  cursor: pointer;
}
.faq__item:last-child { border-bottom: 1px solid var(--line); }
.faq__item summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(22px, 2.4vw, 32px);
  letter-spacing: -.02em;
  cursor: pointer;
  transition: color .25s;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: '+';
  font-family: var(--font-body);
  font-size: 32px;
  font-weight: 200;
  color: var(--accent);
  transition: transform .35s ease;
}
.faq__item[open] summary::after { transform: rotate(45deg); }
.faq__item[open] summary { color: var(--accent); }
.faq__body { padding-top: 18px; max-width: 720px; }
.faq__body p { color: var(--text-dim); margin: 0; font-size: 16px; }

/* ------------------- CTA ------------------- */
.cta {
  position: relative;
  padding: var(--pad-y) 0;
  border-top: 1px solid var(--line);
  overflow: hidden;
}
.cta__mesh { position: absolute; inset: 0; pointer-events: none; opacity: .55; }
.cta__inner {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.cta__copy { padding-right: 40px; }
.cta__copy h2 { margin: 0 0 22px; }
.cta__copy > p { color: var(--text-dim); max-width: 500px; font-size: 17px; }
.cta__bullets { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-direction: column; gap: 12px; }
.cta__bullets li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  color: var(--text-dim);
}
.cta__bullets li::before {
  content: '';
  position: absolute; left: 0; top: 9px;
  width: 14px; height: 1px; background: var(--accent);
}

/* ------------------- FORM ------------------- */
.form {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px;
  display: flex; flex-direction: column; gap: 18px;
  box-shadow: var(--shadow);
}
.form__row--2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form label { display: flex; flex-direction: column; gap: 8px; font-size: 13px; color: var(--text-dim); }
.form label small { color: var(--text-mute); }
.form input,
.form select,
.form textarea {
  font: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 13px 14px;
  color: var(--text);
  font-size: 15px;
  transition: border-color .25s, background .25s;
  width: 100%;
}
.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--surface);
}
.form input.is-error,
.form select.is-error,
.form textarea.is-error { border-color: #f87171; }
.form select { appearance: none; background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none' stroke='%23999' stroke-width='1.5'><path d='M3 5l3 3 3-3'/></svg>"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 36px; }
.form__legal { font-size: 11px; color: var(--text-mute); margin: 4px 0 0; }
.form__success {
  background: rgba(34,197,94,.12);
  border: 1px solid rgba(34,197,94,.35);
  color: var(--text);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
}
.form__success strong { color: #4ade80; }

/* ------------------- FOOTER ------------------- */
.footer { background: var(--bg-elev); border-top: 1px solid var(--line); padding: 80px 0 30px; }
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--line);
}
.footer__brand p { color: var(--text-dim); font-size: 14px; max-width: 320px; margin-top: 18px; }
.footer h4 {
  font-size: 12px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin: 0 0 22px;
  font-weight: 500;
}
.footer a {
  display: block;
  color: var(--text-dim);
  font-size: 14px;
  padding: 6px 0;
  transition: color .25s;
}
.footer a:hover { color: var(--accent); }
.footer__bottom {
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--text-mute);
  font-size: 12px;
  flex-wrap: wrap;
}
.footer__bottom a { color: var(--accent); display: inline; padding: 0; }

/* ------------------- REVEAL ------------------- */
.reveal, .reveal-up { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease; }
.reveal.is-in, .reveal-up.is-in { opacity: 1; transform: none; }

/* ------------------- RESPONSIVE ------------------- */
@media (max-width: 980px) {
  .nav__links { display: none; }
  .nav__actions .btn--ghost { display: none; }
  .nav__burger { display: inline-flex; }
  .nav.is-open .nav__links {
    display: flex;
    position: fixed;
    inset: 70px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--glass);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 20px var(--pad-x);
  }
  .nav.is-open .nav__links a { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 18px; }

  .stats { grid-template-columns: 1fr; gap: 50px; }
  .problem__grid { grid-template-columns: 1fr; }
  .treatments__grid { grid-template-columns: 1fr; }
  .testi-grid { grid-template-columns: 1fr; }
  .plans { grid-template-columns: 1fr; }
  .cta__inner { grid-template-columns: 1fr; gap: 40px; }
  .cta__copy { padding-right: 0; }
  .process__step { grid-template-columns: 1fr; gap: 14px; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 560px) {
  .form { padding: 24px; }
  .form__row--2 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .hero__title { font-size: clamp(48px, 14vw, 80px); }
}

/* ============ BEFORE / AFTER ============ */
.beforeafter {
  padding: var(--pad-y) 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elev) 60%, var(--bg) 100%);
  position: relative;
}
.beforeafter__head {
  max-width: 720px;
  margin-bottom: 64px;
}
.beforeafter__head .h2 { margin-top: 18px; }
.beforeafter__lede {
  margin-top: 22px;
  color: var(--text-dim);
  font-size: 17px;
  max-width: 560px;
}
.beforeafter__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.ba-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.ba-card footer {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
  font-size: 13px;
  letter-spacing: .04em;
}
.ba-card footer strong {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 18px;
  letter-spacing: 0;
}
.ba-card footer span {
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: 11px;
  text-align: right;
}
.ba {
  position: relative;
  aspect-ratio: 1/1;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
  cursor: ew-resize;
  user-select: none;
  touch-action: none;
  box-shadow: var(--shadow);
}
.ba img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}
.ba__before { z-index: 1; }
.ba__after {
  z-index: 2;
  clip-path: inset(0 50% 0 0);
  transition: clip-path .35s cubic-bezier(.2,.8,.2,1);
}
.ba.is-dragging .ba__after { transition: none; }
.ba__handle {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  z-index: 3;
  pointer-events: none;
  transition: left .35s cubic-bezier(.2,.8,.2,1);
}
.ba.is-dragging .ba__handle { transition: none; }
.ba__line {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,.92);
  mix-blend-mode: difference;
}
.ba__knob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--text);
  color: var(--bg);
  display: grid;
  place-items: center;
  box-shadow: 0 10px 30px -8px rgba(0,0,0,.5);
  transition: transform .2s ease;
}
.ba:hover .ba__knob { transform: translate(-50%, -50%) scale(1.08); }
.ba__tag {
  position: absolute;
  top: 18px;
  z-index: 4;
  padding: 7px 12px;
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  background: rgba(0,0,0,.6);
  color: #fff;
  border-radius: 4px;
  backdrop-filter: blur(8px);
  pointer-events: none;
}
.ba__tag--before { left: 18px; }
.ba__tag--after { right: 18px; }
[data-theme="light"] .ba__line { background: #fff; }
[data-theme="light"] .ba__tag {
  background: rgba(255,255,255,.85);
  color: var(--text);
}
.beforeafter__disclaimer {
  margin-top: 48px;
  text-align: center;
  color: var(--text-mute);
  font-size: 12px;
  letter-spacing: .04em;
  font-style: italic;
}
@media (max-width: 980px) {
  .beforeafter__grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 640px) {
  .beforeafter__grid { grid-template-columns: 1fr; gap: 28px; }
  .ba__knob { width: 38px; height: 38px; }
}

/* reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ---- Volver a SynetIA ---- */
.back-synetia{position:fixed;bottom:28px;left:24px;z-index:9999;background:rgba(10,10,15,.82);backdrop-filter:blur(12px);color:#fff;font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;padding:9px 18px;border-radius:999px;border:1px solid rgba(255,255,255,.18);text-decoration:none;transition:background .2s,transform .2s;display:inline-flex;align-items:center;gap:6px;}
.back-synetia:hover{background:rgba(30,30,45,.95);transform:translateY(-2px);}