/* ════════════════════════════════════════════════════════════
   Ottho Academy — Landing
   Charte : indigo #4F46E5 → violet #6366F1, navy #1E1B4B, bg #F4F5FA
   Display : Clash Display · Corps : Inter (police de l'app)
   ════════════════════════════════════════════════════════════ */

:root {
  --primary:   #4F46E5;
  --primary-2: #6366F1;
  --violet:    #7C5CFC;
  --navy:      #1E1B4B;
  --navy-2:    #312E81;

  --bg:      #F4F5FA;
  --surface: #FFFFFF;
  --ink:     #15172B;
  --t-700:   #353A52;
  --t-500:   #5B6075;
  --t-400:   #8A8FA6;
  --border:  #E8E9F2;

  --success: #16A34A;
  --amber:   #F59E0B;
  --pink:    #EC4899;

  --grad-primary: linear-gradient(135deg, #4F46E5 0%, #6366F1 100%);
  --grad-hero:    linear-gradient(135deg, #4F46E5 0%, #7C5CFC 52%, #6366F1 100%);
  --grad-navy:    linear-gradient(155deg, #211D54 0%, #312E81 100%);

  --shadow-sm: 0 1px 2px rgba(21,23,43,.05), 0 4px 12px rgba(21,23,43,.05);
  --shadow-md: 0 10px 30px -12px rgba(31,29,90,.22), 0 4px 10px rgba(31,29,90,.06);
  --shadow-lg: 0 40px 80px -28px rgba(40,33,120,.42), 0 12px 28px -12px rgba(40,33,120,.22);
  --shadow-device: 0 50px 90px -30px rgba(30,27,75,.5), 0 18px 40px -20px rgba(30,27,75,.32);

  --r-card: 24px;
  --r-pill: 999px;
  --maxw: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);

  --font-display: "Clash Display", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

::selection { background: rgba(79,70,229,.18); }

/* ── Atmosphere ──────────────────────────────────────────── */
.atmosphere { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .55; }
.blob--1 { width: 620px; height: 620px; top: -220px; right: -160px;
  background: radial-gradient(circle at 30% 30%, #6366F1, transparent 70%); }
.blob--2 { width: 560px; height: 560px; top: 460px; left: -240px;
  background: radial-gradient(circle at 40% 40%, #7C5CFC, transparent 70%); opacity: .4; }
.blob--3 { width: 520px; height: 520px; bottom: -180px; right: -120px;
  background: radial-gradient(circle at 50% 50%, #A78BFA, transparent 70%); opacity: .35; }
.grid-overlay {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(79,70,229,.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(79,70,229,.05) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 75%);
}
.grain {
  position: absolute; inset: 0; opacity: .04; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── Containers / shared ─────────────────────────────────── */
.section { max-width: var(--maxw); margin: 0 auto; padding: 96px 24px; }
.section__head { max-width: 680px; margin: 0 auto 56px; text-align: center; }
.kicker {
  display: inline-block; font-weight: 600; font-size: .8rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 16px;
}
.kicker--light { color: #C7D2FE; }
.section__title {
  font-family: var(--font-display); font-weight: 600; line-height: 1.05;
  font-size: clamp(1.9rem, 4.2vw, 3rem); letter-spacing: -.02em; color: var(--ink);
}
.section__lead { margin-top: 18px; color: var(--t-500); font-size: 1.08rem; }

.grad-text {
  background: var(--grad-hero); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.grad-text-light {
  background: linear-gradient(120deg, #C7D2FE, #A78BFA);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 9px; font-weight: 600;
  font-family: var(--font-body); border-radius: var(--r-pill); cursor: pointer;
  border: 1px solid transparent; transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .2s;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn i { font-size: 19px; line-height: 1; }
.btn--sm { padding: 9px 18px; font-size: .9rem; }
.btn--lg { padding: 15px 26px; font-size: 1.02rem; }
.btn--primary {
  color: #fff; background: var(--grad-primary);
  box-shadow: 0 10px 24px -8px rgba(79,70,229,.6), inset 0 1px 0 rgba(255,255,255,.25);
}
.btn--primary svg { fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 36px -10px rgba(79,70,229,.7); }
.btn--ghost { color: var(--ink); background: rgba(255,255,255,.7); border-color: var(--border); backdrop-filter: blur(8px); }
.btn--ghost:hover { transform: translateY(-2px); background: #fff; box-shadow: var(--shadow-sm); }

/* ── Nav ─────────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 22px;
  max-width: var(--maxw); margin: 0 auto; padding: 16px 24px;
  transition: padding .3s var(--ease);
}
.nav.scrolled {
  position: fixed; left: 50%; transform: translateX(-50%); top: 12px;
  width: min(var(--maxw), calc(100% - 24px)); padding: 11px 16px 11px 20px;
  background: rgba(255,255,255,.78); backdrop-filter: saturate(180%) blur(16px);
  border: 1px solid var(--border); border-radius: var(--r-pill); box-shadow: var(--shadow-md);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; }
.brand__text { font-size: 1.12rem; letter-spacing: -.01em; }
.brand__light { color: var(--t-400); font-weight: 600; }
.brand__mark { display: inline-flex; filter: drop-shadow(0 4px 8px rgba(79,70,229,.3)); }
.nav__links { display: flex; gap: 28px; margin-left: auto; }
.nav__links a { font-size: .94rem; color: var(--t-500); font-weight: 500; position: relative; transition: color .2s; }
.nav__links a::after { content: ""; position: absolute; left: 0; bottom: -5px; width: 0; height: 2px;
  background: var(--grad-primary); border-radius: 2px; transition: width .25s var(--ease); }
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { width: 100%; }
.nav__cta { margin-left: 4px; }
.nav__burger { display: none; }

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(36px, 6vw, 80px) 24px clamp(60px, 7vw, 100px);
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.7); border: 1px solid var(--border);
  padding: 7px 15px; border-radius: var(--r-pill);
  font-size: .82rem; font-weight: 600; color: var(--t-700); margin-bottom: 26px;
  box-shadow: var(--shadow-sm); backdrop-filter: blur(8px);
}
.eyebrow__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success);
  box-shadow: 0 0 0 4px rgba(22,163,74,.18); animation: pulse 2.4s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.45} }

.hero__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.6rem, 6.6vw, 4.6rem); line-height: 1.02; letter-spacing: -.03em;
}
.hero__sub { margin-top: 24px; font-size: clamp(1.05rem, 1.6vw, 1.22rem); color: var(--t-500); max-width: 30em; }
.hero__sub strong { color: var(--ink); font-weight: 600; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero__note { display: flex; align-items: center; gap: 8px; margin-top: 26px;
  font-size: .9rem; color: var(--t-500); }
.hero__note svg, .hero__note i { color: var(--success); flex-shrink: 0; }
.hero__note i { font-size: 17px; }
.hero__note strong { color: var(--primary); font-weight: 600; }

/* Hero stage / devices */
.hero__stage { position: relative; min-height: 540px; display: flex; align-items: center; justify-content: center; }
.hero__glow { position: absolute; width: 460px; height: 460px; border-radius: 50%;
  background: radial-gradient(circle, rgba(124,92,252,.5), transparent 65%); filter: blur(40px); z-index: 0; }
.device {
  position: relative; z-index: 1; width: 270px; aspect-ratio: 393 / 852;
  background: #0C0F1F; border-radius: 42px; padding: 9px;
  box-shadow: var(--shadow-device);
  border: 1px solid rgba(255,255,255,.08);
}
.device::before { /* notch */
  content: ""; position: absolute; top: 9px; left: 50%; transform: translateX(-50%);
  width: 38%; height: 22px; background: #0C0F1F; border-radius: 0 0 14px 14px; z-index: 3;
}
.device img { border-radius: 34px; width: 100%; height: 100%; object-fit: cover; }
.hero__stage .device--back {
  position: absolute; width: 232px; transform: translate(64px, -28px) rotate(6deg); z-index: 0;
  opacity: .96; filter: saturate(1.05);
}
.hero__stage .device--front { transform: translate(-34px, 18px) rotate(-3deg); }

.hero__chip {
  position: absolute; z-index: 4; display: inline-flex; align-items: center; gap: 6px;
  font-size: .82rem; font-weight: 600;
  padding: 10px 14px; border-radius: 14px; background: #fff;
  box-shadow: var(--shadow-md); border: 1px solid var(--border); white-space: nowrap;
}
.hero__chip i { font-size: 16px; line-height: 1; }
.hero__chip--xp { top: 38px; left: -6px; color: #EA580C; }
.hero__chip--ia { bottom: 56px; right: -8px; color: var(--primary); }
.hero__chip--ia i { color: var(--violet); }

/* ── Trust strip ─────────────────────────────────────────── */
.strip {
  max-width: var(--maxw); margin: 0 auto; padding: 22px 24px;
  display: flex; align-items: center; justify-content: center; gap: clamp(18px, 4vw, 56px);
  flex-wrap: wrap;
}
.strip__item { display: flex; flex-direction: column; align-items: center; text-align: center; }
.strip__num { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: -.02em; color: var(--ink); line-height: 1; }
.strip__amp { color: var(--t-400); font-weight: 500; }
.strip__lbl { font-size: .82rem; color: var(--t-500); margin-top: 6px; }
.strip__sep { width: 1px; height: 38px; background: var(--border); }

/* ── Features grid ───────────────────────────────────────── */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-card);
  padding: 30px 26px; box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
  position: relative; overflow: hidden;
}
.feature::after { content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: radial-gradient(120% 100% at 100% 0, rgba(99,102,241,.07), transparent 50%);
  opacity: 0; transition: opacity .3s; }
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(99,102,241,.3); }
.feature:hover::after { opacity: 1; }
.feature__icon {
  display: inline-flex; width: 52px; height: 52px; border-radius: 15px; margin-bottom: 20px;
  align-items: center; justify-content: center;
  background: linear-gradient(140deg, color-mix(in srgb, var(--c1) 14%, #fff), color-mix(in srgb, var(--c2) 9%, #fff));
  border: 1px solid color-mix(in srgb, var(--c1) 22%, transparent);
}
.feature__icon i { font-size: 28px; line-height: 1; color: var(--c1); }
.feature h3 { font-size: 1.18rem; font-weight: 700; letter-spacing: -.01em; margin-bottom: 8px; }
.feature p { color: var(--t-500); font-size: .96rem; }

.feature-chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 32px; list-style: none; }
.feature-chips li {
  font-size: .88rem; font-weight: 500; color: var(--t-700);
  padding: 9px 16px; border-radius: var(--r-pill);
  background: rgba(255,255,255,.7); border: 1px solid var(--border); backdrop-filter: blur(6px);
}
.feature-chips li::before { content: "+ "; color: var(--primary); font-weight: 700; }

/* ── Showcase rows ───────────────────────────────────────── */
.showcase .row { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 6vw, 80px);
  align-items: center; padding: 48px 0; }
.row--reverse .row__copy { order: 2; }
.row__tag {
  display: inline-block; font-size: .8rem; font-weight: 600; letter-spacing: .04em;
  color: var(--t); background: color-mix(in srgb, var(--t) 12%, #fff);
  border: 1px solid color-mix(in srgb, var(--t) 25%, transparent);
  padding: 5px 13px; border-radius: var(--r-pill); margin-bottom: 18px;
}
.row__copy h3 { font-family: var(--font-display); font-weight: 600; letter-spacing: -.02em;
  font-size: clamp(1.6rem, 3.4vw, 2.3rem); line-height: 1.1; margin-bottom: 16px; }
.row__copy p { color: var(--t-500); font-size: 1.05rem; max-width: 30em; }
.ticks { list-style: none; margin-top: 22px; display: grid; gap: 12px; }
.ticks li { position: relative; padding-left: 30px; color: var(--t-700); font-weight: 500; }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: 3px; width: 19px; height: 19px; border-radius: 50%;
  background: var(--grad-primary) padding-box;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='12' r='12'/%3E%3C/svg%3E");
  box-shadow: inset 0 0 0 20px var(--primary);
}
.ticks li::after {
  content: ""; position: absolute; left: 5px; top: 8px; width: 9px; height: 5px;
  border-left: 2px solid #fff; border-bottom: 2px solid #fff; transform: rotate(-45deg);
}
.row__media { display: flex; justify-content: center; align-items: center; position: relative; }
.row__media .device { width: 262px; }
/* paire d'écrans : on décale le grand vers la gauche, le petit prend le coin bas-droite sans recouvrir le CTA */
.row--reverse .row__media > .device:not(.device--mini) { margin-right: 92px; }
.device--mini { width: 156px !important; position: absolute; right: 0; bottom: -7%; z-index: 2;
  border-radius: 30px; padding: 7px; box-shadow: var(--shadow-device); }
.device--mini::before { height: 15px; border-radius: 0 0 10px 10px; }
.device--mini img { border-radius: 24px; }
.row--reverse .row__media { order: 1; }

/* ── Tuteur IA band ──────────────────────────────────────── */
.tutor { background: var(--grad-navy); position: relative; overflow: hidden; margin-top: 40px; }
.tutor::before { content: ""; position: absolute; width: 600px; height: 600px; border-radius: 50%;
  top: -200px; left: -120px; background: radial-gradient(circle, rgba(124,92,252,.4), transparent 65%); filter: blur(40px); }
.tutor__inner { max-width: var(--maxw); margin: 0 auto; padding: clamp(60px, 8vw, 100px) 24px;
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: center; position: relative; }
.tutor__title { font-family: var(--font-display); font-weight: 700; color: #fff;
  font-size: clamp(2rem, 4.6vw, 3.2rem); line-height: 1.05; letter-spacing: -.02em; }
.tutor__copy p { color: #C3C7E8; margin-top: 20px; font-size: 1.1rem; max-width: 32em; }
.tutor__stats { display: flex; gap: 36px; margin-top: 34px; flex-wrap: wrap; }
.tutor__stats > div { display: flex; flex-direction: column; }
.tutor__stats strong { font-family: var(--font-display); font-weight: 600; font-size: 1.7rem; color: #fff; }
.tutor__stats span { font-size: .86rem; color: #A5A9D4; margin-top: 2px; }
.tutor__media { display: flex; justify-content: center; }
.tutor__media .device { width: 274px; }
.tutor__media .device { box-shadow: 0 50px 90px -24px rgba(0,0,0,.6); }

/* ── Gallery marquee ─────────────────────────────────────── */
.gallery { overflow: visible; }   /* pas de clip : le slider doit déborder en pleine largeur (body a overflow-x:hidden) */
.marquee { position: relative; width: 100vw; left: 50%; transform: translateX(-50%); padding: 12px 0; }
.marquee::before, .marquee::after { content: ""; position: absolute; top: 0; bottom: 0; width: 14%; z-index: 2; pointer-events: none; }
.marquee::before { left: 0; background: linear-gradient(90deg, var(--bg), transparent); }
.marquee::after { right: 0; background: linear-gradient(270deg, var(--bg), transparent); }
.marquee__track { display: flex; align-items: flex-start; gap: 28px; width: max-content; padding: 20px 28px;
  animation: scroll 48s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes scroll { to { transform: translateX(-50%); } }
.shot { flex-shrink: 0; width: 210px; text-align: center; }
.shot img { display: block; width: 100%; height: auto; aspect-ratio: 393 / 852;
  border-radius: 26px; border: 6px solid #0C0F1F; box-shadow: var(--shadow-lg);
  transition: transform .35s var(--ease); }
.shot:hover img { transform: translateY(-8px) scale(1.02); }
.shot figcaption { margin-top: 14px; font-size: .85rem; font-weight: 600; color: var(--t-500); }

/* ── Final CTA ───────────────────────────────────────────── */
.cta { max-width: var(--maxw); margin: 0 auto; padding: 40px 24px 96px; }
.cta__card {
  position: relative; overflow: hidden; text-align: center;
  background: var(--grad-hero); border-radius: 36px; padding: clamp(48px, 7vw, 84px) 28px;
  box-shadow: var(--shadow-lg);
}
.cta__glow { position: absolute; inset: 0;
  background: radial-gradient(60% 120% at 50% 0, rgba(255,255,255,.22), transparent 60%); }
.cta__card > * { position: relative; z-index: 1; }
.cta__title { font-family: var(--font-display); font-weight: 700; color: #fff;
  font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.05; letter-spacing: -.02em; margin-top: 6px; }
.cta__sub { color: rgba(255,255,255,.88); margin-top: 18px; font-size: 1.1rem; max-width: 34em; margin-inline: auto; }
.stores { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-top: 34px; }
.store {
  display: inline-flex; align-items: center; gap: 12px; color: #fff;
  background: rgba(12,15,31,.55); border: 1px solid rgba(255,255,255,.22);
  padding: 12px 22px; border-radius: 16px; backdrop-filter: blur(6px);
  transition: transform .25s var(--ease), background .2s;
}
.store:hover { transform: translateY(-2px); background: rgba(12,15,31,.75); }
.store span { display: flex; flex-direction: column; line-height: 1.15; text-align: left; }
.store small { font-size: .68rem; opacity: .8; }
.store strong { font-size: 1.05rem; }
.cta__fine { color: rgba(255,255,255,.82); font-size: .88rem; margin-top: 26px; }
.cta__fine strong { color: #fff; }

/* ── Footer ──────────────────────────────────────────────── */
.footer { border-top: 1px solid var(--border); background: rgba(255,255,255,.5); }
.footer__inner { max-width: var(--maxw); margin: 0 auto; padding: 40px 24px;
  display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.footer__links { display: flex; gap: 24px; margin-left: auto; flex-wrap: wrap; }
.footer__links a { font-size: .92rem; color: var(--t-500); transition: color .2s; }
.footer__links a:hover { color: var(--ink); }
.footer__copy { width: 100%; font-size: .84rem; color: var(--t-400); padding-top: 8px; border-top: 1px solid var(--border); margin-top: 4px; }

/* ── Float animations ────────────────────────────────────── */
.float-slow { animation: float 7s ease-in-out infinite; }
.float-fast { animation: float 5.5s ease-in-out infinite; }
@keyframes float { 0%,100%{ transform: translateY(0) } 50%{ transform: translateY(-14px) } }
.hero__stage .device--back.float-slow { animation: floatBack 8s ease-in-out infinite; }
.hero__stage .device--front.float-fast { animation: floatFront 6.5s ease-in-out infinite; }
@keyframes floatBack { 0%,100%{ transform: translate(64px,-28px) rotate(6deg) } 50%{ transform: translate(64px,-44px) rotate(6deg) } }
@keyframes floatFront { 0%,100%{ transform: translate(-34px,18px) rotate(-3deg) } 50%{ transform: translate(-34px,4px) rotate(-3deg) } }

/* ── Reveal on scroll ────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 28px; }
  .hero__sub { margin-inline: auto; }
  .hero__actions, .hero__note { justify-content: center; }
  .hero__stage { min-height: 480px; margin-top: 20px; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .showcase .row, .row--reverse .row { grid-template-columns: 1fr; text-align: center; }
  .row__copy, .row--reverse .row__copy, .row__media, .row--reverse .row__media { order: unset !important; }
  .row__copy p { margin-inline: auto; }
  .ticks { justify-items: center; max-width: 360px; margin-inline: auto; }
  .ticks li { text-align: left; }
  .tutor__inner { grid-template-columns: 1fr; text-align: center; }
  .tutor__copy p { margin-inline: auto; }
  .tutor__stats { justify-content: center; }
  .tutor__media { margin-top: 20px; }
}

@media (max-width: 720px) {
  .nav__links, .nav__cta { display: none; }
  .nav__burger {
    display: inline-flex; flex-direction: column; gap: 5px; margin-left: auto;
    background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 11px 12px; cursor: pointer;
  }
  .nav__burger span { width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s var(--ease); }
  .nav__burger[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .nav__burger[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .nav.open .nav__links {
    display: flex; flex-direction: column; gap: 4px; position: absolute; top: calc(100% + 10px); right: 12px; left: 12px;
    background: #fff; border: 1px solid var(--border); border-radius: 20px; padding: 14px; box-shadow: var(--shadow-md);
  }
  .nav.open .nav__links a { padding: 12px 14px; border-radius: 12px; }
  .nav.open .nav__links a:hover { background: var(--bg); }
  .section { padding: 72px 20px; }
  .features { grid-template-columns: 1fr; }
  .strip__sep { display: none; }
  .strip { gap: 28px 36px; }
  .device--mini { display: none; }
}

@media (max-width: 420px) {
  .hero__title { font-size: 2.5rem; }
  .device { width: 232px; }
  .hero__stage .device--front { transform: rotate(-3deg); }
  .hero__stage .device--back { width: 200px; transform: translate(80px,-26px) rotate(6deg); }
  .hero__chip--xp { left: -2px; }
  .hero__chip--ia { right: -2px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}