/* =========================================================
   Happy Robo — style.css
   Colours    : :root variables neeche
   Dance speed: .stage { --beat: .3s; }  (kam number = tez dance)
   ========================================================= */

:root {
  --navy: #14213D;
  --navy-2: #0E1830;
  --ink: #1B2440;
  --muted: #4A5573;
  --paper: #FFFDF7;
  --tint: #F2F7FF;
  --sun: #FFC233;
  --sun-100: #FFF0C2;
  --coral: #FF6B57;
  --coral-100: #FFE0DA;
  --mint: #4DF0C8;
  --mint-600: #27B59A;
  --mint-100: #D5FBF0;
  --sky: #6FBEFF;
  --sky-100: #DCEFFF;
  --line: 3px solid var(--navy);
  --r-lg: 26px;
  --r-md: 18px;
  --shadow: 6px 6px 0 var(--navy);
  --header-h: 72px;
  --font-head: "Fredoka", "Trebuchet MS", system-ui, sans-serif;
  --font-body: "Nunito", "Segoe UI", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
h1, h2, h3 { font-family: var(--font-head); color: var(--navy); line-height: 1.15; margin: 0 0 .5em; letter-spacing: .01em; }
h1 { font-size: clamp(2.1rem, 5vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 600; }
h3 { font-size: 1.3rem; font-weight: 600; }
p { margin: 0 0 1em; }
a { color: var(--navy); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--coral); }
ul { margin: 0; padding: 0; }
:focus-visible { outline: 4px solid var(--coral); outline-offset: 3px; border-radius: 6px; }

.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 12px; top: -60px; background: var(--navy); color: #fff; padding: 10px 16px; border-radius: 10px; z-index: 300; transition: top .2s; }
.skip:focus { top: 12px; color: #fff; }

.wrap { width: min(1160px, 100% - 40px); margin-inline: auto; }
.section { padding: clamp(48px, 7vw, 96px) 0; }
.section.tint { background: var(--tint); border-block: 3px solid var(--navy); }
.prose { max-width: 68ch; }
.prose p:last-child { margin-bottom: 0; }
.lead { font-size: clamp(1.1rem, 2vw, 1.35rem); max-width: 62ch; color: var(--ink); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5em;
  font: 700 1.05rem/1 var(--font-head); letter-spacing: .02em;
  padding: 15px 26px; border-radius: 999px; cursor: pointer;
  background: var(--coral); color: #fff; border: var(--line); text-decoration: none;
  box-shadow: 4px 4px 0 var(--navy);
  transition: transform .15s, box-shadow .15s, background .15s;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--navy); color: #fff; }
.btn:active { transform: translate(3px, 3px); box-shadow: 1px 1px 0 var(--navy); }
.btn-sm { padding: 10px 20px; font-size: .98rem; }
.btn-light { background: var(--sun); color: var(--navy); }
.btn-light:hover { color: var(--navy); }
.btn-ghost { background: transparent; color: var(--navy); }
.btn-ghost:hover { color: var(--navy); background: var(--sun-100); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100; height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 0 clamp(16px, 3vw, 36px);
  background: rgba(255, 253, 247, .92); backdrop-filter: blur(10px);
  border-bottom: 3px solid var(--navy);
  transition: box-shadow .25s;
}
.site-header.is-scrolled { box-shadow: 0 6px 0 rgba(20, 33, 61, .08); }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 700 1.5rem/1 var(--font-head); color: var(--navy); text-decoration: none; }
.brand:hover { color: var(--navy); }
.logo-mark { width: 44px; height: 44px; flex: none; transition: transform .3s; }
.brand:hover .logo-mark { transform: rotate(-8deg) scale(1.08); }

.nav ul { list-style: none; display: flex; align-items: center; gap: 4px; }
.nav a:not(.btn) {
  display: block; padding: 8px 13px; border-radius: 999px; text-decoration: none;
  font: 600 1rem/1.2 var(--font-head); color: var(--navy); transition: background .15s;
}
.nav a:not(.btn):hover { background: var(--sun-100); color: var(--navy); }
.nav a[aria-current="page"]:not(.btn) { background: var(--sun); border: 2px solid var(--navy); padding: 6px 11px; }
.nav .btn { margin-left: 8px; }

.nav-toggle { display: none; width: 48px; height: 48px; border: var(--line); border-radius: 14px; background: var(--sun); cursor: pointer; padding: 0; position: relative; }
.nav-toggle span { position: absolute; left: 11px; right: 11px; height: 3px; background: var(--navy); border-radius: 3px; transition: transform .25s, opacity .2s, top .25s; }
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 28px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

@media (max-width: 1080px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: calc(var(--header-h) - 3px); left: 0; right: 0;
    background: var(--paper); border-bottom: 3px solid var(--navy);
    max-height: 0; overflow: hidden; visibility: hidden; transition: max-height .3s ease, visibility .3s;
  }
  .nav.open { max-height: 90vh; visibility: visible; overflow-y: auto; }
  .nav ul { flex-direction: column; align-items: stretch; padding: 12px 16px 20px; gap: 4px; }
  .nav a:not(.btn) { padding: 13px 16px; font-size: 1.1rem; }
  .nav .btn { margin: 8px 0 0; }
}

/* ---------- Page heads ---------- */
.page-head { position: relative; overflow: hidden; padding: clamp(56px, 9vw, 110px) 0 clamp(48px, 7vw, 84px); border-bottom: 3px solid var(--navy); }
.page-head::before, .page-head::after { content: ""; position: absolute; border-radius: 50%; border: 3px solid var(--navy); opacity: .9; pointer-events: none; }
.page-head::before { width: 220px; height: 220px; right: -60px; top: -70px; background: rgba(255,255,255,.55); }
.page-head::after { width: 110px; height: 110px; right: 12%; bottom: -46px; background: rgba(255,255,255,.35); }
.page-head .wrap { position: relative; z-index: 1; }
.page-head h1 { margin-bottom: .35em; }
.tone-sun { background: var(--sun-100); }
.tone-coral { background: var(--coral-100); }
.tone-sky { background: var(--sky-100); }
.tone-mint { background: var(--mint-100); }

/* ---------- Layout helpers ---------- */
.split { display: grid; grid-template-columns: 1.35fr 1fr; gap: clamp(28px, 5vw, 64px); align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.stack { display: grid; gap: 28px; }
.grid { display: grid; gap: 24px; margin-top: 28px; }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .g3, .g4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .g3, .g4 { grid-template-columns: 1fr; } }

/* ---------- Sticker / cards ---------- */
.sticker, .card, .product, .form {
  border: var(--line); border-radius: var(--r-lg); box-shadow: var(--shadow); padding: 28px;
}
.sun { background: var(--sun-100); }
.mint { background: var(--mint-100); }
.coral { background: var(--coral-100); }
.sky { background: var(--sky-100); }
.sticker { transform: rotate(1.2deg); transition: transform .25s; }
.sticker:hover { transform: rotate(0); }
.sticker h3 { margin-bottom: .6em; }
.card { transition: transform .2s, box-shadow .2s; }
.card:hover { transform: translate(-3px, -3px); box-shadow: 9px 9px 0 var(--navy); }
.card .ico { display: grid; place-items: center; width: 62px; height: 62px; font-size: 1.9rem; background: #fff; border: var(--line); border-radius: 18px; margin-bottom: 16px; transition: transform .3s; }
.card:hover .ico { transform: rotate(-8deg) scale(1.08); }
.card h3 { margin-bottom: .3em; }
.card p { margin: 0; color: var(--ink); }

.ticks { list-style: none; display: grid; gap: 10px; margin: 12px 0; }
.ticks li { position: relative; padding-left: 38px; font-weight: 600; }
.ticks li::before {
  content: "✓"; position: absolute; left: 0; top: 1px; width: 26px; height: 26px; display: grid; place-items: center;
  border-radius: 50%; background: var(--navy); color: var(--mint); font-size: .9rem; font-weight: 800;
}
.ticks.large { gap: 16px; }
.ticks.large li { font-size: 1.2rem; }

/* products */
.product { display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: center; transition: transform .2s; }
.product:hover { transform: translateX(6px); }
.product-ico { width: 104px; height: 104px; display: grid; place-items: center; font-size: 3.2rem; background: #fff; border: var(--line); border-radius: 50%; }
.product h2 { font-size: 1.7rem; margin-bottom: .2em; }
.product p { margin-bottom: .4em; }
@media (max-width: 600px) { .product { grid-template-columns: 1fr; } .product-ico { width: 84px; height: 84px; font-size: 2.6rem; } }

/* trio */
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 28px 0; border: var(--line); border-radius: var(--r-lg); background: #fff; overflow: hidden; }
.trio-item { padding: 28px; border-right: var(--line); }
.trio-item:last-child { border-right: 0; }
.trio-item h3 { color: var(--coral); }
.trio-item p { margin: 0; }
@media (max-width: 760px) { .trio { grid-template-columns: 1fr; } .trio-item { border-right: 0; border-bottom: var(--line); } .trio-item:last-child { border-bottom: 0; } }

/* statement */
.statement { border: var(--line); border-radius: 34px; box-shadow: 10px 10px 0 var(--navy); padding: clamp(28px, 6vw, 64px); text-align: center; }
.statement h2 { margin-bottom: .4em; }
.statement p { font: 600 clamp(1.25rem, 2.6vw, 1.9rem)/1.4 var(--font-head); color: var(--navy); max-width: 30em; margin: 0 auto; }

/* swap list */
.swap { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin: 28px 0; }
.swap li { display: grid; gap: 6px; text-align: center; padding: 20px 12px; background: #fff; border: var(--line); border-radius: var(--r-md); }
.swap s { color: #8A93AD; font-weight: 600; text-decoration-color: var(--coral); text-decoration-thickness: 3px; }
.swap strong { font: 700 1.3rem/1.2 var(--font-head); color: var(--navy); }
@media (max-width: 760px) { .swap { grid-template-columns: repeat(2, 1fr); } }

/* chips */
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 14px; margin-top: 24px; }
.chips li { font: 700 1.1rem/1 var(--font-head); padding: 14px 24px; border: var(--line); border-radius: 999px; box-shadow: 3px 3px 0 var(--navy); transition: transform .15s; }
.chips li:hover { transform: translateY(-4px) rotate(-2deg); }
.chips.big li { font-size: clamp(1.25rem, 2.6vw, 1.8rem); padding: 20px 34px; box-shadow: 5px 5px 0 var(--navy); }
.c1 { background: var(--sun); } .c2 { background: var(--mint); } .c3 { background: var(--coral); color: #fff; } .c4 { background: var(--sky); }

/* link cards */
.link-cards { display: grid; gap: 16px; }
.link-card { display: grid; gap: 2px; padding: 20px 24px; background: #fff; border: var(--line); border-radius: var(--r-md); text-decoration: none; box-shadow: 4px 4px 0 var(--navy); transition: transform .15s, box-shadow .15s, background .15s; }
.link-card strong { font: 700 1.25rem/1.2 var(--font-head); }
.link-card span { color: var(--muted); }
.link-card:hover { transform: translate(-3px, -3px); box-shadow: 7px 7px 0 var(--navy); background: var(--sun-100); }

/* big list */
.big-list { list-style: none; counter-reset: v; display: grid; gap: 14px; margin: 24px 0 32px; max-width: 760px; }
.big-list li { counter-increment: v; display: flex; align-items: center; gap: 18px; font: 600 clamp(1.15rem, 2.2vw, 1.5rem)/1.3 var(--font-head); color: var(--navy); padding: 16px 20px; background: #fff; border: var(--line); border-radius: var(--r-md); }
.big-list li::before { content: counter(v); flex: none; width: 42px; height: 42px; display: grid; place-items: center; background: var(--sun); border: var(--line); border-radius: 50%; font-size: 1.15rem; }

/* CTA band */
.band { background: var(--navy); color: #fff; position: relative; overflow: hidden; border-top: 3px solid var(--navy); }
.band::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 12% 30%, rgba(77,240,200,.18), transparent 40%), radial-gradient(circle at 88% 70%, rgba(255,107,87,.22), transparent 42%); pointer-events: none; }
.band-in { position: relative; text-align: center; padding: clamp(52px, 8vw, 92px) 0; display: grid; justify-items: center; gap: 6px; }
.band h2 { color: #fff; }
.band p { color: #DCE4FA; max-width: 52ch; margin-bottom: 20px; }

/* contact */
.contact-list { list-style: none; display: grid; gap: 14px; margin: 0 0 32px; }
.contact-list li { display: flex; align-items: center; gap: 16px; padding: 14px 18px; background: #fff; border: var(--line); border-radius: var(--r-md); }
.contact-list li > span { font-size: 1.7rem; }
.contact-list small { display: block; color: var(--muted); font-weight: 700; line-height: 1.2; }
.form { display: grid; gap: 16px; }
.form h3 { margin: 0; }
.form label { display: grid; gap: 6px; font-weight: 700; color: var(--navy); }
.form input, .form textarea {
  font: 600 1rem/1.4 var(--font-body); color: var(--ink); background: #fff;
  padding: 12px 14px; border: 3px solid var(--navy); border-radius: 14px; width: 100%;
}
.form input:focus, .form textarea:focus { outline: 4px solid var(--sun); outline-offset: 0; }
.form [aria-invalid="true"] { border-color: var(--coral); background: #FFF6F4; }
.form-msg { margin: 0; min-height: 1.4em; font-weight: 700; }
.form-msg.ok { color: #0B7A63; }
.form-msg.err { color: #C7301C; }
.form .btn { justify-self: start; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-2); color: #C9D3F0; padding: 56px clamp(20px, 5vw, 60px) 28px; }
.foot-grid { width: min(1160px, 100%); margin: 0 auto; display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
@media (max-width: 800px) { .foot-grid { grid-template-columns: 1fr; gap: 28px; } }
.site-footer .brand { color: #fff; margin-bottom: 14px; }
.site-footer .brand:hover { color: var(--sun); }
.site-footer h2 { font-size: 1.15rem; color: var(--sun); margin-bottom: .8em; }
.site-footer p { max-width: 38ch; }
.site-footer a { color: #E7ECFF; text-decoration: none; }
.site-footer a:hover { color: var(--mint); text-decoration: underline; }
.foot-links { list-style: none; display: grid; gap: 8px; }
.copy { width: min(1160px, 100%); margin: 40px auto 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); font-size: .95rem; color: #9AA6C9; }

/* install buttons */
.nav-install { display: none; }
.link-btn { font: 700 1rem/1.2 var(--font-body); color: var(--navy); background: var(--mint); border: 2px solid var(--mint); border-radius: 999px; padding: 8px 16px; cursor: pointer; transition: transform .15s; }
.link-btn:hover { transform: translateY(-2px); }
.link-btn[hidden], .nav-install button[hidden] { display: none; }
@media (max-width: 1080px) { .nav-install { display: block; } }

/* ---------- Floating: install / back-to-top / toast ---------- */
.install-fab {
  position: fixed; left: 16px; bottom: 16px; z-index: 90;
  display: inline-flex; align-items: center; gap: 8px;
  font: 700 .98rem/1 var(--font-head); color: var(--navy);
  background: var(--mint); border: var(--line); border-radius: 999px; padding: 11px 18px 11px 14px;
  box-shadow: 3px 3px 0 var(--navy); cursor: pointer; transition: transform .15s, box-shadow .15s;
}
.install-fab:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--navy); }
.install-fab[hidden] { display: none; }
.to-top {
  position: fixed; right: 16px; bottom: 16px; z-index: 90; width: 48px; height: 48px; border-radius: 50%;
  background: var(--sun); border: var(--line); box-shadow: 3px 3px 0 var(--navy); font-size: 1.3rem; cursor: pointer;
  opacity: 0; transform: translateY(20px); pointer-events: none; transition: opacity .25s, transform .25s;
}
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.toast {
  position: fixed; left: 50%; bottom: 84px; z-index: 200; width: min(92vw, 440px);
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  background: var(--navy); color: #fff; border: 3px solid var(--sun); border-radius: 18px; padding: 16px 20px; font-weight: 600;
  transition: opacity .25s, transform .25s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.toast b { color: var(--sun); }

/* scroll reveal (JS adds .reveal, then .in) */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; transform: none; }

/* =========================================================
   HERO — full-width dancing robot stage
   ========================================================= */
.hero { background: var(--navy-2); border-bottom: 3px solid var(--navy); }

.stage {
  --beat: .3s;                              /* ← dance speed (kam = tez) */
  position: relative; isolation: isolate; overflow: hidden;
  min-height: calc(100svh - var(--header-h));
  min-height: max(560px, calc(100svh - var(--header-h)));
  display: flex; flex-direction: column; align-items: center; justify-content: flex-end;
  padding-top: 68px;
  background:
    radial-gradient(ellipse 60% 50% at 50% 55%, rgba(77, 240, 200, .16), transparent 70%),
    linear-gradient(180deg, #0A1226 0%, #16264F 62%, #1B2E5E 100%);
}
.stage::before {                              /* stars */
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: .8;
  background-image:
    radial-gradient(2px 2px at 8% 18%, #fff, transparent), radial-gradient(2px 2px at 22% 62%, #FFC233, transparent),
    radial-gradient(1.5px 1.5px at 33% 12%, #fff, transparent), radial-gradient(2px 2px at 47% 30%, #4DF0C8, transparent),
    radial-gradient(1.5px 1.5px at 61% 8%, #fff, transparent), radial-gradient(2px 2px at 72% 44%, #FF6B57, transparent),
    radial-gradient(1.5px 1.5px at 84% 20%, #fff, transparent), radial-gradient(2px 2px at 92% 58%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 14% 84%, #fff, transparent), radial-gradient(2px 2px at 55% 76%, #FFC233, transparent);
  animation: twinkle calc(var(--beat) * 10) ease-in-out infinite alternate;
}
@keyframes twinkle { from { opacity: .35; } to { opacity: 1; } }

.beam {
  position: absolute; top: -12%; width: 46%; height: 118%; z-index: -1; pointer-events: none; opacity: .34;
  transform-origin: 50% 0;
  clip-path: polygon(46% 0, 54% 0, 100% 100%, 0 100%);
  animation: sweep calc(var(--beat) * 14) ease-in-out infinite alternate;
}
.beam.b1 { left: 2%; background: linear-gradient(180deg, rgba(77,240,200,.9), transparent 78%); }
.beam.b2 { right: 2%; background: linear-gradient(180deg, rgba(255,107,87,.9), transparent 78%); animation-direction: alternate-reverse; }
@keyframes sweep { from { transform: rotate(-24deg); } to { transform: rotate(24deg); } }

.floor {
  position: absolute; left: 0; right: 0; bottom: 0; height: 30%; z-index: -1;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,.10) 0 2px, transparent 2px 84px),
    repeating-linear-gradient(0deg, rgba(255,255,255,.10) 0 2px, transparent 2px 34px),
    linear-gradient(180deg, #223772, #0B1430);
  border-top: 3px solid rgba(77, 240, 200, .7);
  box-shadow: 0 -18px 50px rgba(77, 240, 200, .25);
  animation: floorglow calc(var(--beat) * 2) ease-in-out infinite alternate;
}
@keyframes floorglow { from { filter: hue-rotate(0deg) brightness(1); } to { filter: hue-rotate(50deg) brightness(1.35); } }

.stage-hint {
  position: absolute; top: 22px; left: 50%; translate: -50% 0; margin: 0; z-index: 3;
  padding: 8px 18px; border-radius: 999px; font: 600 1rem/1 var(--font-head); color: var(--navy);
  background: var(--sun); border: var(--line); box-shadow: 3px 3px 0 var(--navy); white-space: nowrap;
  animation: nudge 1.4s ease-in-out infinite;
}
@keyframes nudge { 50% { transform: translateY(-6px); } }

.robot-btn {
  position: relative; z-index: 2; cursor: pointer; border: 0; background: none; padding: 0;
  height: clamp(300px, calc(100vh - var(--header-h) - 240px), 720px);
  height: clamp(300px, calc(100svh - var(--header-h) - 240px), 720px);
  aspect-ratio: 400 / 460; margin-bottom: 70px; -webkit-tap-highlight-color: transparent; border-radius: 40px;
  transform-origin: 50% 60%;
}
.robot-btn:focus-visible { outline-color: var(--mint); }
.robot-svg { width: 100%; height: 100%; overflow: visible; display: block; }
.robot-btn.is-flip { animation: flip .9s cubic-bezier(.3, .7, .4, 1); }
@keyframes flip {
  0%   { transform: translateY(0) rotate(0) scale(1); }
  45%  { transform: translateY(-150px) rotate(200deg) scale(1.08); }
  100% { transform: translateY(0) rotate(360deg) scale(1); }
}

/* --- robot dance parts ---
   Har part ka pivot (transform-origin) SVG ke coordinates mein hai, isliye
   hath kandhe se, sar gardan se, pair kulhe se ghoomte hain. */
.robot-svg { transform-origin: 50% 94%; transform: scale(calc(1 + var(--pulse, 0) * .05)); }
.robot-svg * { transform-box: fill-box; }
.robot-spin, .robot-jump, .robot-sway, .head, .antenna, .armL, .armR, .legL, .legR { transform-box: view-box; }

.robot-spin { transform-origin: 200px 300px; }
.robot-jump { transform-origin: 200px 428px; animation: hop var(--beat) ease-in-out infinite; }
.robot-sway { transform-origin: 200px 428px; animation: sway calc(var(--beat) * 2) ease-in-out infinite; }
.robot-bob  { animation: step calc(var(--beat) * 2) ease-in-out infinite; }
.head       { transform-origin: 200px 194px; animation: headbop calc(var(--beat) * 2) ease-in-out infinite; }
.antenna    { transform-origin: 200px 62px;  animation: wobble var(--beat) ease-in-out infinite alternate; }
.armL       { transform-origin: 140px 232px; animation: armL calc(var(--beat) * 2) ease-in-out infinite; }
.armR       { transform-origin: 260px 232px; animation: armR calc(var(--beat) * 2) ease-in-out infinite; }
.legL       { transform-origin: 171px 322px; animation: legL calc(var(--beat) * 2) ease-in-out infinite; }
.legR       { transform-origin: 229px 322px; animation: legR calc(var(--beat) * 2) ease-in-out infinite; }

.bulb       { transform-origin: 50% 50%; animation: bulb var(--beat) ease-in-out infinite; }
.bulb-glow  { transform-origin: 50% 50%; animation: glow var(--beat) ease-in-out infinite; }
.bulb-flash { animation: flash calc(var(--beat) * 2) steps(1) infinite; opacity: 0; }
.eye        { transform-origin: 50% 50%; animation: blink 3.2s infinite; translate: var(--ex, 0) var(--ey, 0); }
.brow       { transform-origin: 50% 50%; animation: brow calc(var(--beat) * 2) ease-in-out infinite; }
.browR      { animation-delay: calc(var(--beat) * -1); }
.mouth      { transform-origin: 50% 0; animation: sing var(--beat) ease-in-out infinite; }
.cheek      { transform-origin: 50% 50%; animation: cheek var(--beat) ease-in-out infinite; }
.heart      { transform-origin: 50% 50%; animation: heart var(--beat) ease-in-out infinite; }
.led        { animation: led calc(var(--beat) * 2) steps(1) infinite; }
.led.l2     { animation-delay: calc(var(--beat) * -.66); }
.led.l3     { animation-delay: calc(var(--beat) * -1.33); }
.shadow     { transform-origin: 50% 50%; animation: shadow var(--beat) ease-in-out infinite; }
.bar        { transform-origin: 50% 100%; animation: eq var(--beat) ease-in-out infinite; }
.bar.b2 { animation-duration: calc(var(--beat) * 1.4); animation-delay: calc(var(--beat) * -.3); }
.bar.b3 { animation-duration: calc(var(--beat) * .8);  animation-delay: calc(var(--beat) * -.6); }
.bar.b4 { animation-duration: calc(var(--beat) * 1.2); animation-delay: calc(var(--beat) * -.1); }

.ring { fill: none; stroke-width: 3; stroke: #4DF0C8; transform-origin: 50% 50%; animation: ring calc(var(--beat) * 5) linear infinite; opacity: 0; }
.ring.r2 { stroke: #FFC233; animation-delay: calc(var(--beat) * -1.7); }
.ring.r3 { stroke: #FF6B57; animation-delay: calc(var(--beat) * -3.4); }
.note { font-size: 46px; font-family: var(--font-head); transform-origin: 50% 50%; opacity: 0; animation: note calc(var(--beat) * 9) ease-out infinite; }
.note.n2 { animation-delay: calc(var(--beat) * -2.2); }
.note.n3 { animation-delay: calc(var(--beat) * -4.5); }
.note.n4 { animation-delay: calc(var(--beat) * -6.7); }

@keyframes hop {
  0%, 100% { transform: translateY(0) scale(1.04, .93); }
  50%      { transform: translateY(-46px) scale(.97, 1.05); }
}
@keyframes shadow { 0%, 100% { transform: scale(1.05); opacity: .42; } 50% { transform: scale(.6); opacity: .16; } }
@keyframes sway { 0%, 100% { transform: rotate(-6deg); } 50% { transform: rotate(6deg); } }
@keyframes step { 0%, 100% { transform: translateX(-12px); } 50% { transform: translateX(12px); } }
@keyframes headbop { 0%, 100% { transform: rotate(-10deg) translateY(3px); } 50% { transform: rotate(10deg) translateY(-3px); } }
@keyframes wobble { from { transform: rotate(-12deg); } to { transform: rotate(12deg); } }
@keyframes armL { 0%, 100% { transform: rotate(18deg); } 25% { transform: rotate(158deg); } 50% { transform: rotate(18deg); } 75% { transform: rotate(60deg); } }
@keyframes armR { 0%, 100% { transform: rotate(-18deg); } 25% { transform: rotate(-60deg); } 50% { transform: rotate(-18deg); } 75% { transform: rotate(-158deg); } }
@keyframes legL { 0%, 50%, 100% { transform: translateY(0) rotate(0); } 25% { transform: translateY(-18px) rotate(-10deg); } }
@keyframes legR { 0%, 50%, 100% { transform: translateY(0) rotate(0); } 75% { transform: translateY(-18px) rotate(10deg); } }
@keyframes bulb { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.3); } }
@keyframes glow { 0%, 100% { opacity: .35; transform: scale(.9); } 50% { opacity: 1; transform: scale(1.5); } }
@keyframes flash { 0% { opacity: 0; } 50% { opacity: .75; } 100% { opacity: 0; } }
@keyframes blink { 0%, 90%, 100% { transform: scaleY(1); } 94% { transform: scaleY(.08); } }
@keyframes brow { 0%, 100% { transform: translateY(0) rotate(0); } 50% { transform: translateY(-5px) rotate(-6deg); } }
@keyframes sing { 0%, 100% { transform: scaleY(.45); } 50% { transform: scaleY(1.05); } }
@keyframes cheek { 0%, 100% { opacity: .55; } 50% { opacity: 1; } }
@keyframes heart { 0%, 100% { transform: scale(1); } 15% { transform: scale(1.3); } 30% { transform: scale(1.05); } 45% { transform: scale(1.22); } 65% { transform: scale(1); } }
@keyframes led { 0%, 100% { opacity: .25; } 50% { opacity: 1; } }
@keyframes eq { 0%, 100% { transform: scaleY(.18); } 50% { transform: scaleY(1); } }
@keyframes ring { 0% { transform: scale(.55); opacity: .95; } 100% { transform: scale(3); opacity: 0; } }
@keyframes note {
  0%   { transform: translateY(30px) rotate(-12deg) scale(.6); opacity: 0; }
  15%  { opacity: 1; }
  100% { transform: translateY(-150px) rotate(22deg) scale(1.25); opacity: 0; }
}

/* ---------- Dance moves (JS stage par data-move set karta hai) ---------- */
/* DISCO: ek hath upar point, kamar ka bada jhool */
.stage[data-move="disco"] .armL { animation-name: discoL; }
.stage[data-move="disco"] .armR { animation-name: discoR; }
.stage[data-move="disco"] .robot-sway { animation-name: swayBig; }
.stage[data-move="disco"] .robot-jump { animation-name: hopSmall; }
@keyframes discoL { 0%, 45% { transform: rotate(14deg); } 50%, 95% { transform: rotate(146deg); } 100% { transform: rotate(14deg); } }
@keyframes discoR { 0%, 45% { transform: rotate(-146deg); } 50%, 95% { transform: rotate(-14deg); } 100% { transform: rotate(-146deg); } }
@keyframes swayBig { 0%, 100% { transform: rotate(-10deg); } 50% { transform: rotate(10deg); } }
@keyframes hopSmall { 0%, 100% { transform: translateY(0) scale(1.03, .96); } 50% { transform: translateY(-22px) scale(.99, 1.02); } }

/* WAVE: dono hath hila kar hello */
.stage[data-move="wave"] .armL { animation: waveL var(--beat) ease-in-out infinite; }
.stage[data-move="wave"] .armR { animation: waveR var(--beat) ease-in-out infinite; }
.stage[data-move="wave"] .robot-sway { animation-name: swaySmall; }
@keyframes waveL { 0%, 100% { transform: rotate(138deg); } 50% { transform: rotate(176deg); } }
@keyframes waveR { 0%, 100% { transform: rotate(-176deg); } 50% { transform: rotate(-138deg); } }
@keyframes swaySmall { 0%, 100% { transform: rotate(-3deg); } 50% { transform: rotate(3deg); } }

/* ROBOT: jhatke se, stepped poses */
.stage[data-move="robot"] .robot-sway, .stage[data-move="robot"] .robot-bob { animation: none; }
.stage[data-move="robot"] .robot-jump { animation: robotHop calc(var(--beat) * 2) steps(1, end) infinite; }
.stage[data-move="robot"] .armL { animation: robotL calc(var(--beat) * 4) steps(1, end) infinite; }
.stage[data-move="robot"] .armR { animation: robotR calc(var(--beat) * 4) steps(1, end) infinite; }
.stage[data-move="robot"] .head { animation: robotHead calc(var(--beat) * 4) steps(1, end) infinite; }
.stage[data-move="robot"] .legL, .stage[data-move="robot"] .legR { animation-timing-function: steps(1, end); }
@keyframes robotHop { 0% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
@keyframes robotL { 0%, 50% { transform: rotate(90deg); } 25%, 75% { transform: rotate(150deg); } }
@keyframes robotR { 0%, 25% { transform: rotate(-90deg); } 50%, 75% { transform: rotate(-150deg); } }
@keyframes robotHead { 0%, 50% { transform: rotate(0); } 25% { transform: rotate(-20deg); } 75% { transform: rotate(20deg); } }

/* SPIN: poora ghoom kar palat-na */
.stage[data-move="spin"] .robot-spin { animation: turn calc(var(--beat) * 8) ease-in-out infinite; }
.stage[data-move="spin"] .robot-jump { animation-name: hopBig; }
@keyframes turn { 0%, 12% { transform: scaleX(1); } 30% { transform: scaleX(-1); } 42%, 55% { transform: scaleX(-1); } 75% { transform: scaleX(1); } 100% { transform: scaleX(1); } }
@keyframes hopBig { 0%, 100% { transform: translateY(0) scale(1.05, .92); } 50% { transform: translateY(-64px) scale(.96, 1.06); } }

/* music ke saath (JS: --pulse aur --b1..--b4 set karta hai) */
.stage::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(circle at 50% 62%, rgba(255, 194, 51, .38), transparent 55%);
  opacity: calc(var(--pulse, 0) * .85);
}
.stage.analysing .bar { animation: none; }
.stage.analysing .bar.b1 { transform: scaleY(var(--b1, .3)); }
.stage.analysing .bar.b2 { transform: scaleY(var(--b2, .3)); }
.stage.analysing .bar.b3 { transform: scaleY(var(--b3, .3)); }
.stage.analysing .bar.b4 { transform: scaleY(var(--b4, .3)); }

/* khush chehra (tap par) */
.stage.is-happy .eye { animation: none; transform: scaleY(.22) translateY(5px); }
.stage.is-happy .mouth { animation-duration: calc(var(--beat) * .5); }

/* speech bubble */
.bubble {
  position: absolute; z-index: 6; left: calc(50% + min(150px, 18vw)); top: 130px; max-width: min(250px, 44vw);
  padding: 12px 16px; margin: 0; background: #fff; color: var(--navy);
  border: var(--line); border-radius: 22px 22px 22px 4px;
  font: 600 1.05rem/1.3 var(--font-head); box-shadow: 4px 4px 0 rgba(0, 0, 0, .35);
  opacity: 0; transform: translateY(10px) scale(.9); transform-origin: 0 100%; pointer-events: none;
  transition: opacity .2s, transform .28s cubic-bezier(.3, 1.6, .5, 1);
}
.bubble.show { opacity: 1; transform: none; }

/* move tag */
.move-tag {
  position: absolute; top: 20px; right: 20px; z-index: 3; display: flex; align-items: center; gap: 8px;
  padding: 6px 6px 6px 16px; color: #fff; font: 600 1rem/1 var(--font-head);
  background: rgba(10, 18, 38, .72); backdrop-filter: blur(8px);
  border: 2px solid rgba(255, 255, 255, .25); border-radius: 999px;
}
.move-tag b { color: var(--sun); min-width: 3.6em; }
.move-tag button {
  font: 700 .9rem/1 var(--font-head); color: #fff; cursor: pointer;
  background: rgba(255, 255, 255, .12); border: 2px solid rgba(255, 255, 255, .35); border-radius: 999px; padding: 8px 12px;
}
.move-tag button:hover { background: rgba(255, 255, 255, .24); }
.move-tag button[aria-pressed="true"] { background: var(--mint); color: var(--navy); border-color: var(--mint); }

/* music on: thoda extra glow */
.stage.music-on .beam { opacity: .5; }
.stage.music-on .floor { box-shadow: 0 -22px 70px rgba(255, 194, 51, .35); }

/* pause */
.stage.is-paused, .stage.is-paused *, .stage.is-paused *::before { animation-play-state: paused !important; }

/* confetti burst (JS) */
.confetti { position: absolute; z-index: 4; pointer-events: none; font-size: 26px; animation: burst 1.1s ease-out forwards; }
@keyframes burst { from { transform: translate(0, 0) scale(.4); opacity: 1; } to { transform: translate(var(--x), var(--y)) rotate(var(--rot)) scale(1.1); opacity: 0; } }

/* ---------- Stage controls + music ---------- */
.stage-controls {
  position: relative; z-index: 5; display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 8px;
  margin: 0 12px 22px; padding: 10px;
  background: rgba(10, 18, 38, .72); backdrop-filter: blur(8px);
  border: 2px solid rgba(255,255,255,.25); border-radius: 26px;
}
.stage-controls button, .music-panel button {
  font: 700 .98rem/1 var(--font-head); cursor: pointer; color: #fff;
  background: rgba(255,255,255,.1); border: 2px solid rgba(255,255,255,.35); border-radius: 999px; padding: 10px 16px;
  transition: background .15s, color .15s, transform .15s; white-space: nowrap;
}
.stage-controls button:hover { background: rgba(255,255,255,.22); }
.stage-controls button:active { transform: scale(.95); }
.stage-controls button[aria-pressed="true"] { background: var(--mint); color: var(--navy); border-color: var(--mint); }
.stage-controls .sep { width: 2px; align-self: stretch; background: rgba(255,255,255,.25); margin: 2px 4px; }
#musicBtn { background: var(--coral); border-color: var(--coral); }
#musicBtn[aria-pressed="true"] { background: var(--sun); border-color: var(--sun); color: var(--navy); }

.music-panel {
  position: absolute; left: 50%; bottom: calc(100% + 12px); z-index: 10;
  width: min(94vw, 400px); padding: 18px; display: grid; gap: 12px;
  background: var(--paper); color: var(--ink); border: var(--line); border-radius: 22px; box-shadow: 6px 6px 0 rgba(0,0,0,.35);
  transform: translate(-50%, 12px); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .2s, transform .2s, visibility .2s;
}
.music-panel.open { transform: translate(-50%, 0); opacity: 1; visibility: visible; pointer-events: auto; }
.music-panel h3 { font-size: 1.1rem; margin: 0; }
.music-panel label { font-weight: 700; color: var(--navy); font-size: .95rem; }
.music-row { display: flex; gap: 8px; align-items: center; }
.music-row input[type="url"] { flex: 1; min-width: 0; font: 600 .95rem var(--font-body); padding: 10px 12px; border: 3px solid var(--navy); border-radius: 12px; background: #fff; color: var(--ink); }
.music-panel button { color: var(--navy); background: var(--sun); border: 3px solid var(--navy); padding: 9px 14px; }
.music-panel button:hover { background: var(--mint); }
.music-panel button.plain { background: #fff; }
.music-panel input[type="range"] { flex: 1; min-width: 70px; accent-color: var(--coral); }
.music-status { margin: 0; font-size: .92rem; font-weight: 600; color: var(--muted); min-height: 1.3em; }
.music-status.err { color: #C7301C; }
.music-status a { color: var(--coral); }
.yt-box { display: none; border: 3px solid var(--navy); border-radius: 14px; overflow: hidden; background: #000; aspect-ratio: 16 / 9; min-height: 170px; }
.yt-box.show { display: block; }
.yt-box iframe { width: 100%; height: 100%; display: block; }

@media (max-width: 640px) {
  .stage-hint { top: 12px; font-size: .9rem; }
  .stage { padding-top: 104px; }
  .robot-btn { height: clamp(240px, calc(100svh - var(--header-h) - 350px), 108vw); margin-bottom: 96px; }
  .move-tag { top: 56px; right: auto; left: 50%; translate: -50% 0; white-space: nowrap; padding-left: 12px; }
  .bubble { left: 50%; translate: -50% 0; top: 106px; max-width: 94vw; white-space: nowrap; padding: 8px 14px; font-size: .95rem; border-radius: 999px; }
  .stage-controls { gap: 6px; padding: 8px; }
  .stage-controls button { padding: 9px 12px; font-size: .9rem; }
  .stage-controls .sep { display: none; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .stage-hint, .beam, .stage::before, .floor { animation: none; }
  .robot-svg { transform: none; }
}

/* chhoti screens par floating install button hide (menu + footer mein button hai) */
@media (max-width: 1100px) { .install-fab { display: none; } }