/* =========================================================
   THE PHYSIORA — design tokens
   ========================================================= */
:root {
  --primary: #7d3a96;
  --primary-dark: #5a2a70;
  --primary-light: #a86bc4;
  --accent: #f2c5fa;
  --accent-teal: #29b6a3;
  --ink: #241a2e;
  --ink-soft: #675875;
  --bg: #faf7fc;
  --bg-alt: #f4ebf8;
  --white: #ffffff;
  --border: #e7d9ee;
  --shadow-sm: 0 4px 14px rgba(93, 41, 112, .08);
  --shadow-md: 0 14px 34px rgba(93, 41, 112, .14);
  --radius: 16px;
  --radius-sm: 10px;
  --header-h: 76px;
  --font-head: 'Poppins', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; width: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
  position: relative;
}
body.nav-locked { position: fixed; left: 0; right: 0; overflow-y: hidden; }
h1, h2, h3, h4, h5 { font-family: var(--font-head); color: var(--ink); margin: 0 0 .5em; line-height: 1.2; }
p { line-height: 1.7; color: var(--ink-soft); margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.ic { width: 1.1em; height: 1.1em; fill: currentColor; vertical-align: -.15em; }
.hide-sm { display: inline-flex; align-items: center; gap: 6px; }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: .95rem;
  border: 2px solid transparent; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-lg { padding: 15px 30px; font-size: 1rem; }
.btn-block { width: 100%; }

/* =========================================================
   Topbar
   ========================================================= */
.topbar { background: var(--primary-dark); color: #f4e9fa; font-size: .82rem; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; padding: 8px 24px; gap: 12px; flex-wrap: wrap; }
.topbar-info { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.topbar-info a { display: inline-flex; align-items: center; gap: 6px; opacity: .92; }
.topbar-info a:hover { opacity: 1; }
.topbar-social { display: flex; gap: 14px; }
.topbar-social a { opacity: .85; }
.topbar-social a:hover { opacity: 1; }

/* =========================================================
   Header / Nav
   ========================================================= */
.site-header {
  /* z-index must beat .nav-backdrop (600): .site-header is a positioned
     ancestor of #mainNav, so it creates the stacking context #mainNav's own
     z-index:700 is scoped inside — from outside, only .site-header's number
     is compared against siblings like #navBackdrop. Too low here and the
     backdrop paints over the whole header, including the open nav panel
     (looks dimmed/"inactive" and swallows every click meant for a nav link). */
  position: sticky; top: 0; z-index: 650; background: rgba(250, 247, 252, .9);
  backdrop-filter: blur(10px); border-bottom: 1px solid transparent; transition: box-shadow .2s ease, border-color .2s ease;
}
.site-header.scrolled { box-shadow: var(--shadow-sm); border-color: var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-head); font-weight: 600; font-size: 1.05rem; color: var(--primary-dark); }
.brand-mark { height: 42px; width: auto; display: block; }
.brand-text strong { color: var(--primary); }

.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav ul { display: flex; gap: 26px; }
.nav-link { font-weight: 500; font-size: .95rem; color: var(--ink); position: relative; padding: 6px 0; }
.nav-link::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px; background: var(--primary); transition: width .2s ease; }
.nav-link:hover::after { width: 100%; }
.nav-toggle, .nav-close { display: none; background: none; border: none; cursor: pointer; color: var(--primary-dark); padding: 8px; }
.nav-toggle .ic, .nav-close .ic { width: 26px; height: 26px; }
.nav-backdrop { display: none; }

/* =========================================================
   Hero
   ========================================================= */
.hero { position: relative; padding: 76px 0 88px; overflow: hidden; }
.hero-shape { position: absolute; border-radius: 50%; filter: blur(2px); z-index: 0; }
.hero-shape-1 { width: 480px; height: 480px; top: -180px; right: -140px; background: radial-gradient(circle, var(--accent) 0%, transparent 70%); opacity: .8; }
.hero-shape-2 { width: 340px; height: 340px; bottom: -160px; left: -120px; background: radial-gradient(circle, rgba(41,182,163,.25) 0%, transparent 70%); }
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-block; background: var(--accent); color: var(--primary-dark); font-weight: 600; font-size: .8rem; padding: 7px 16px; border-radius: 999px; margin-bottom: 18px; }
.hero h1 { font-size: clamp(2rem, 4.2vw, 3.2rem); font-weight: 700; letter-spacing: -.01em; }
.hero h1 span { color: var(--primary); display: block; }
.hero p { font-size: 1.05rem; max-width: 46ch; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 28px 0 40px; }

.hero-visual { display: flex; justify-content: center; }
.hero-visual .doctor-card { width: 100%; max-width: 360px; box-shadow: var(--shadow-md); }

/* =========================================================
   Sections (generic)
   ========================================================= */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 48px; }
.kicker { display: inline-block; color: var(--primary); font-weight: 700; font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 10px; }
.kicker-light { color: var(--accent); }
.section-cta { text-align: center; margin-top: 40px; }

/* About */
.about-content { max-width: 760px; }
.about-content .lead { font-size: 1.1rem; color: var(--ink); font-weight: 500; }
.check-list li { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; color: var(--ink-soft); }
.check-list .ic { color: var(--accent-teal); flex-shrink: 0; margin-top: .25em; }
.mission-label { font-family: var(--font-head); font-weight: 700; color: var(--primary-dark); margin: 22px 0 14px; }

.doctor-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-sm); text-align: center; }
.doctor-avatar {
  width: 100px; height: 100px; margin: 0 auto 16px; border-radius: 50%;
  background: var(--accent); overflow: hidden; border: 3px solid var(--white);
  box-shadow: var(--shadow-sm);
}
.doctor-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.doctor-role { color: var(--accent-teal); font-weight: 600; font-size: .88rem; margin-bottom: 14px; }

/* Stats band */
.stats-band {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 64px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark)); border-radius: var(--radius);
  padding: 34px 24px; text-align: center;
}
.stats-band strong { display: block; font-family: var(--font-head); font-size: 2rem; font-weight: 800; color: #fff; }
.stats-band span { display: flex; align-items: center; justify-content: center; gap: 6px; color: var(--accent); font-size: .85rem; font-weight: 500; }
.stat-star { width: .95em; height: .95em; }

/* Achievements — recognition photos as a horizontally-scrolling strip
   (same pattern as .testi-grid): however many images sit in assets/img/
   and get a .gallery-item here, the strip just scrolls to reach them all,
   no layout math needed as more are added. */
.achievements .lead { font-size: 1.1rem; font-weight: 600; color: var(--primary-dark); }

/* Image left, recognition list to its right when there's room; stacks
   (image on top) below that width. Capped and centered (like .section-head
   and every other section's content block) so it reads as one balanced
   unit in the middle of the section instead of stretching edge-to-edge
   across the full 1180px container at wide viewports. */
.achievements-layout {
  display: grid; grid-template-columns: 340px 1fr; gap: 40px; align-items: start;
  max-width: 960px; margin: 0 auto;
}

.achievement-gallery {
  display: flex; gap: 20px; overflow-x: auto; overflow-y: hidden;
  padding: 4px 4px 20px; scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch; touch-action: pan-x;
  justify-content: flex-start;
}
.achievement-gallery::-webkit-scrollbar { height: 8px; }
.achievement-gallery::-webkit-scrollbar-track { background: var(--bg-alt); border-radius: 8px; }
.achievement-gallery::-webkit-scrollbar-thumb { background: var(--primary-light); border-radius: 8px; }
.achievement-gallery { scrollbar-width: thin; scrollbar-color: var(--primary-light) var(--bg-alt); }
.gallery-item {
  flex: 0 0 260px; scroll-snap-align: start; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-md); border: 1px solid var(--border); background: var(--white);
}
.gallery-item img { width: 100%; height: 360px; object-fit: cover; display: block; }
.achievement-list { padding-top: 4px; }

/* Testimonials — horizontally-scrolling strip, not a grid, so all real
   testimonials are reachable (swipe/scroll sideways) without ballooning
   the page height */
.testi-grid {
  display: flex; flex-direction: row; gap: 20px;
  overflow-x: auto; overflow-y: hidden;
  padding: 4px 4px 20px; scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch; touch-action: pan-x;
}
.testi-grid::-webkit-scrollbar { height: 8px; }
.testi-grid::-webkit-scrollbar-track { background: var(--bg-alt); border-radius: 8px; }
.testi-grid::-webkit-scrollbar-thumb { background: var(--primary-light); border-radius: 8px; }
.testi-grid { scrollbar-width: thin; scrollbar-color: var(--primary-light) var(--bg-alt); }
.testi-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm); scroll-snap-align: start;
  flex: 0 0 340px;
}
.testi-quote { color: var(--accent); width: 22px; height: 22px; margin-bottom: 12px; }
.testi-text { font-size: .92rem; color: var(--ink-soft); }
.testi-name { font-family: var(--font-head); font-weight: 600; color: var(--primary-dark); margin: 0; }

/* Card grids */
.card-grid { display: grid; gap: 26px; }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }

.icon-badge {
  width: 56px; height: 56px; border-radius: 14px; display: grid; place-items: center;
  background: var(--accent); color: var(--primary-dark); margin-bottom: 18px;
}
.icon-badge .ic { width: 26px; height: 26px; }

.service-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.service-card h3 { font-size: 1.15rem; }

/* Specialization pills */
.pill-grid { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.pill {
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.3); color: #fff;
  padding: 12px 22px; border-radius: 999px; font-weight: 500; font-size: .92rem;
}
.specialization, .treatment { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); }
.specialization .kicker, .treatment .kicker { color: var(--accent); }
.specialization h2, .treatment h2 { color: #fff; }
.treatment .section-head p { color: rgba(255,255,255,.82); }

/* Treatment techniques — tabbed specialization menu */
.tech-tabs { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 34px; }
.tech-tab {
  flex: 1 1 150px; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 22px 18px; text-align: center; box-shadow: var(--shadow-sm); cursor: pointer;
  font: inherit; transition: transform .2s ease, border-color .2s ease, background .2s ease, color .2s ease;
}
.tech-tab:hover { transform: translateY(-3px); border-color: var(--primary-light); }
.tech-tab .tech-num { display: block; font-family: var(--font-head); font-weight: 800; font-size: 1.3rem; color: var(--accent); margin-bottom: 8px; transition: color .2s ease; }
.tech-tab h4 { font-size: .92rem; margin: 0; }
.tech-tab.active {
  /* Inside .treatment the section background is the same primary gradient
     the inactive tabs contrast against, so the active state can't reuse
     that gradient too — it'd blend into the section instead of standing
     out. Use the light accent instead, same "pops against the purple"
     language as .specialization's pills. */
  background: var(--accent); border-color: transparent;
  box-shadow: var(--shadow-md);
}
.tech-tab.active h4 { color: var(--primary-dark); }
.tech-tab.active .tech-num { color: var(--primary); }

.tech-panel { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.tech-item {
  /* Same rounded "pill" language as .pill in #specialization, just scaled
     up for a multi-line title+description card instead of a one-line chip —
     a literal border-radius:999px pill shape only works on single-line
     content, so this uses a large-but-fixed radius instead. */
  background: var(--white); border: 1px solid var(--border); border-radius: 28px;
  padding: 26px 28px; box-shadow: var(--shadow-sm);
}
.tech-item h4 { font-size: 1rem; color: var(--primary-dark); margin-bottom: 8px; }
.tech-item p { font-size: .9rem; margin: 0; }

/* Programs */
.program-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 34px; box-shadow: var(--shadow-sm); }
.program-card h3 { color: var(--primary-dark); font-size: 1.35rem; }

/* =========================================================
   Videos
   ========================================================= */
.yt-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.yt-card { position: relative; border-radius: var(--radius-sm); overflow: hidden; cursor: pointer; background: var(--ink); box-shadow: var(--shadow-sm); }
.yt-card .thumb-wrap { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.yt-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.yt-card:hover img { transform: scale(1.06); }
.yt-play {
  position: absolute; inset: 0; display: grid; place-items: center;
}
.yt-play span {
  width: 56px; height: 56px; border-radius: 50%; background: rgba(125,58,150,.88); color: #fff;
  display: grid; place-items: center; transition: transform .2s ease, background .2s ease;
}
.yt-card:hover .yt-play span { background: var(--primary); transform: scale(1.1); }
.yt-title { padding: 12px 14px; font-size: .85rem; font-weight: 600; color: #fff; background: rgba(0,0,0,.55); }

/* =========================================================
   Testimonials
   ========================================================= */
.reviews-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-top: 40px; }

/* =========================================================
   Contact
   ========================================================= */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 14px; margin: 22px 0; }
.contact-info a { display: flex; align-items: flex-start; gap: 12px; font-weight: 500; line-height: 1.5; }
.contact-info .ic { color: var(--primary); width: 1.3em; height: 1.3em; flex-shrink: 0; margin-top: .15em; }
.map-embed { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); }
.map-embed iframe { display: block; }
.map-address {
  margin: 0; padding: 14px 18px; background: var(--white); border-top: 1px solid var(--border);
  font-size: .85rem; color: var(--ink-soft);
}

.contact-form { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-sm); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--ink-soft); }
.form-group input, .form-group textarea {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-sm); border: 1.5px solid var(--border);
  font-family: var(--font-body); font-size: .95rem; background: var(--bg); transition: border-color .2s ease;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
.form-note { text-align: center; font-size: .85rem; margin-top: 14px; }
.form-note a { color: var(--primary); font-weight: 600; }

/* =========================================================
   Footer
   ========================================================= */
.site-footer { background: var(--ink); color: #d9cde0; padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr .8fr .8fr .8fr; gap: 40px; padding-bottom: 44px; }
.footer-brand p { color: #b6a6c0; margin: 14px 0 20px; }
.footer-brand .brand { color: #fff; }
.footer-brand .brand-text strong { color: var(--accent); }
.footer-social { display: flex; gap: 12px; }
.footer-social a { width: 38px; height: 38px; border-radius: 50%; background: rgba(255,255,255,.08); display: grid; place-items: center; transition: background .2s ease; }
.footer-social a:hover { background: var(--primary); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links h5 { color: #fff; font-size: .9rem; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 6px; }
.footer-links a, .footer-links span { color: #b6a6c0; font-size: .92rem; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px;
  padding: 20px 24px; border-top: 1px solid rgba(255,255,255,.08); font-size: .82rem; color: #9483a1;
}
.footer-bottom a { color: var(--accent); font-weight: 600; }

/* =========================================================
   Floating WhatsApp
   ========================================================= */
.wa-float {
  position: fixed; right: 22px; bottom: 22px; width: 56px; height: 56px; border-radius: 50%;
  background: #25D366; color: #fff; display: grid; place-items: center; box-shadow: 0 8px 24px rgba(37,211,102,.4);
  z-index: 400; transition: transform .2s ease;
}
.wa-float:hover { transform: scale(1.08); }
.wa-float .ic { width: 28px; height: 28px; }

/* =========================================================
   Lightbox
   ========================================================= */
.lightbox {
  position: fixed; inset: 0; background: rgba(20, 10, 25, .92); z-index: 1000;
  display: none; align-items: center; justify-content: center; padding: 40px 20px;
  touch-action: none;
}
.lightbox.open { display: flex; }
.lightbox-frame { width: 100%; max-width: 900px; aspect-ratio: 16/9; background: #000; border-radius: 10px; overflow: hidden; }
.lightbox-frame iframe { width: 100%; height: 100%; border: 0; }
.lightbox-close {
  position: absolute; top: 20px; right: 24px; background: rgba(255,255,255,.1); border: none;
  color: #fff; width: 44px; height: 44px; border-radius: 50%; cursor: pointer; display: grid; place-items: center;
}
.lightbox-close:hover { background: rgba(255,255,255,.2); }

/* =========================================================
   Reveal-on-scroll
   ========================================================= */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1024px) {
  .yt-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }

  .main-nav {
    position: fixed; top: 0; right: 0; height: 100vh; width: min(320px, 84vw);
    background: var(--white); flex-direction: column; align-items: flex-start; justify-content: flex-start;
    padding: 26px 26px 40px; gap: 30px; transform: translateX(100%); transition: transform .3s ease;
    z-index: 700; box-shadow: -12px 0 30px rgba(0,0,0,.15); overflow-y: auto;
    max-width: 100vw;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; gap: 20px; width: 100%; margin-top: 20px; }
  .nav-link { font-size: 1.05rem; }
  .nav-cta { width: 100%; }
  .nav-toggle { display: block; }
  .nav-close { display: block; align-self: flex-end; }
  .nav-backdrop {
    position: fixed; inset: 0; background: rgba(20,10,25,.5); z-index: 600; opacity: 0; pointer-events: none; transition: opacity .3s ease;
  }
  .nav-backdrop.open { display: block; opacity: 1; pointer-events: auto; }
}

@media (max-width: 900px) {
  /* .hero-visual now holds the doctor card (real content, a CTA), not a
     decorative graphic — no `order: -1` here, it should stack below the
     headline/actions on mobile, not jump above them */
  .hero-inner, .contact-grid, .achievements-layout { grid-template-columns: 1fr; }
  .hero-visual { margin-top: 8px; }
  .card-grid-3, .card-grid-2, .tech-panel { grid-template-columns: 1fr; }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
  .testi-card { flex-basis: 78vw; }
  .gallery-item { flex-basis: 68vw; }
  .gallery-item img { height: 300px; }
  /* Six tab labels (some long, e.g. "Neurodynamic Technique") don't fit as
     wrapped flex items on a phone without repeating the pill "one per line"
     problem — switch to a horizontal scroll-snap row instead, same pattern
     as .testi-grid / .achievement-gallery. */
  .tech-tabs { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 6px; scroll-snap-type: x proximity; -webkit-overflow-scrolling: touch; }
  .tech-tab { flex: 0 0 62vw; scroll-snap-align: start; }
}

@media (max-width: 780px) {
  .topbar-info .hide-sm, .hide-sm { display: none; }
  .topbar-inner { justify-content: center; }
}

@media (max-width: 640px) {
  .section { padding: 60px 0; }
  .hero { padding: 44px 0 60px; }
  .yt-grid { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-actions .btn, .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1; }
  .footer-bottom { flex-direction: column; text-align: center; }
  /* Pills stay auto-width (sized to their own text) at every width — this
     just shrinks padding/font enough that two of them can usually share a
     row on a phone, instead of each one being wide enough to force itself
     onto its own line. */
  .pill-grid { gap: 8px; }
  .pill { padding: 7px 13px; font-size: .78rem; }
}

@media (max-width: 420px) {
  .yt-grid { grid-template-columns: 1fr; }
}