/* ==========================================================================
   Alphabbud Kids — stylesheet
   ========================================================================== */

:root {
  /* Brand colors */
  --navy: #0B1026;
  --navy-2: #151B3D;
  --blue: #3B82F6;
  --cyan: #22D3EE;
  --purple: #8B5CF6;
  --yellow: #FACC15;
  --white: #FFFFFF;

  --ink: #E7E9F5;
  --ink-dim: #A6ACC9;
  --line: rgba(139, 154, 214, 0.16);
  --glass: rgba(21, 27, 61, 0.55);

  --grad-primary: linear-gradient(135deg, var(--blue), var(--purple));
  --grad-accent: linear-gradient(120deg, var(--cyan), var(--blue));

  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container: 1200px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;

  --nav-h: 76px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
body, h1, h2, h3, h4, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font: inherit; color: inherit; }

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

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; color: var(--white); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.15rem; }
p { color: var(--ink-dim); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--blue); color: var(--white);
  padding: 10px 16px; z-index: 999; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Background grid used across dark sections */
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.07) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black 40%, transparent 90%);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  padding: 13px 26px; border-radius: 100px; font-weight: 600; font-size: 0.95rem;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--grad-primary); color: var(--white);
  box-shadow: 0 8px 24px -8px rgba(59,130,246,0.55);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -8px rgba(139,92,246,0.6); }
.btn--outline {
  border: 1.5px solid rgba(148,163,255,0.35); color: var(--white); background: rgba(255,255,255,0.02);
}
.btn--outline:hover { border-color: var(--cyan); background: rgba(34,211,238,0.08); transform: translateY(-2px); }
.btn--ghost { border: 1px solid var(--line); color: var(--ink); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn--sm { padding: 9px 18px; font-size: 0.85rem; }
.btn--lg { padding: 15px 32px; font-size: 1rem; }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background .35s ease, border-color .35s ease, backdrop-filter .35s ease;
}
.navbar.is-scrolled {
  background: rgba(11, 16, 38, 0.72);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.navbar__inner { display: flex; align-items: center; justify-content: space-between; width: 100%; }

.brand { display: flex; align-items: center; gap: 10px; }
.brand__text { font-family: var(--font-display); font-weight: 600; font-size: 1.2rem; color: var(--white); }
.brand__text em { font-style: normal; color: var(--cyan); }

.nav-links { display: flex; gap: 28px; }
.nav-link { font-size: 0.92rem; color: var(--ink-dim); position: relative; padding: 6px 0; transition: color .2s ease; }
.nav-link::after {
  content: ''; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--grad-accent); transition: width .25s ease;
}
.nav-link:hover, .nav-link.is-active { color: var(--white); }
.nav-link:hover::after, .nav-link.is-active::after { width: 100%; }

.navbar__actions { display: flex; align-items: center; gap: 12px; }
.nav-whatsapp svg { color: #25D366; }

.menu-toggle { display: none; flex-direction: column; gap: 5px; width: 30px; height: 24px; justify-content: center; }
.menu-toggle span { display: block; width: 100%; height: 2px; background: var(--white); transition: transform .3s ease, opacity .3s ease; }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed; top: 0; right: 0; height: 100%; width: min(320px, 82vw); z-index: 300;
  background: linear-gradient(180deg, var(--navy-2), var(--navy));
  border-left: 1px solid var(--line);
  padding: 100px 28px 28px;
  display: flex; flex-direction: column; justify-content: space-between;
  transform: translateX(100%);
  transition: transform .4s cubic-bezier(.22,1,.36,1);
}
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu nav { display: flex; flex-direction: column; gap: 22px; }
.mobile-link { font-family: var(--font-display); font-size: 1.15rem; color: var(--white); }
.mobile-menu__actions { display: flex; flex-direction: column; gap: 12px; margin-top: 30px; }
.mobile-menu-backdrop {
  position: fixed; inset: 0; background: rgba(3,5,16,0.6); z-index: 290;
  opacity: 0; pointer-events: none; transition: opacity .3s ease;
}
.mobile-menu-backdrop.is-visible { opacity: 1; pointer-events: auto; }

/* ---------- Hero ---------- */
.hero {
  position: relative; padding: calc(var(--nav-h) + 64px) 0 90px;
  overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.blob {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.35;
}
.blob--1 { width: 480px; height: 480px; top: -160px; right: -120px; background: var(--purple); }
.blob--2 { width: 420px; height: 420px; bottom: -180px; left: -140px; background: var(--blue); }
.particles { position: absolute; inset: 0; }
.particle {
  position: absolute; width: 3px; height: 3px; border-radius: 50%; background: var(--cyan);
  opacity: 0.5; animation: drift linear infinite;
}
@keyframes drift {
  0% { transform: translateY(0); opacity: 0; }
  10% { opacity: .6; }
  90% { opacity: .6; }
  100% { transform: translateY(-120px); opacity: 0; }
}

.hero__inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center;
}

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px; border-radius: 100px; font-size: 0.85rem; font-weight: 500;
  background: rgba(139,92,246,0.12); border: 1px solid rgba(139,92,246,0.35); color: #C9B9FF;
  margin-bottom: 22px;
}

.hero__title { font-size: clamp(2.3rem, 5vw, 3.4rem); color: var(--white); letter-spacing: -0.01em; }
.hero__highlight {
  font-family: var(--font-display); font-size: clamp(1.1rem, 2vw, 1.35rem);
  background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-top: 14px; font-weight: 600;
}
.hero__text { margin-top: 18px; max-width: 46ch; font-size: 1.03rem; }
.hero__cta { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 32px; }
.hero__trust { display: flex; align-items: center; gap: 10px; margin-top: 26px; color: var(--ink-dim); font-size: 0.92rem; }
.stars { color: var(--yellow); letter-spacing: 2px; }

/* Hero visual */
.hero__visual { position: relative; height: 460px; }
.abacus-card {
  position: relative; width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
}
.abacus-svg { width: 78%; max-width: 320px; filter: drop-shadow(0 0 26px rgba(59,130,246,0.35)); }
.bead-row circle { animation: beadSlide 5s ease-in-out infinite; }
.bead-row[data-speed="1.3"] circle { animation-duration: 4s; }
.bead-row[data-speed="0.8"] circle { animation-duration: 6s; }
@keyframes beadSlide {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(14px); }
}

.floating-symbol {
  position: absolute; font-family: var(--font-mono); color: var(--cyan); opacity: 0.55;
  animation: floatSlow 6s ease-in-out infinite;
}
.sym--1 { top: 8%; left: 6%; font-size: 1.6rem; color: var(--yellow); }
.sym--2 { top: 20%; right: 4%; font-size: 1.9rem; animation-delay: .5s; }
.sym--3 { bottom: 14%; left: 2%; font-size: 1.4rem; color: var(--purple); animation-delay: 1s; }
.sym--4 { bottom: 6%; right: 12%; font-size: 1.7rem; animation-delay: 1.4s; }
.sym--5 { top: 46%; left: -2%; font-size: 1.2rem; color: var(--yellow); animation-delay: .8s; }
@keyframes floatSlow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.float-card {
  position: absolute; display: flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 100px; font-size: 0.82rem; font-weight: 600; color: var(--white);
  background: var(--glass); border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  animation: floatCard 5s ease-in-out infinite;
}
.float-card span { font-size: 1rem; }
.fc--1 { top: 4%; left: -4%; animation-delay: 0s; }
.fc--2 { top: 30%; right: -8%; animation-delay: .6s; }
.fc--3 { bottom: 22%; left: -8%; animation-delay: 1.2s; }
.fc--4 { bottom: -2%; right: 2%; animation-delay: 1.8s; }
@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- Section head ---------- */
.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-head--left { text-align: left; margin: 0 0 32px; }
.section-head p { margin-top: 12px; font-size: 1.02rem; }

section { padding: 96px 0; position: relative; }

/* ---------- Stats ---------- */
.stats { background: var(--navy-2); }
.stats__heading { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat { text-align: center; padding: 28px 12px; border-radius: var(--radius-md); border: 1px solid var(--line); background: rgba(255,255,255,0.02); }
.stat__num, .stat__text {
  display: block; font-family: var(--font-display); font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 700;
  background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat__text { font-size: 1.3rem; }
.stat__label { display: block; margin-top: 8px; color: var(--ink-dim); font-size: 0.9rem; }

/* ---------- About ---------- */
.about__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about__copy h2 { margin-bottom: 18px; }
.about__copy p { margin-bottom: 14px; max-width: 52ch; }
.about__visual { display: flex; justify-content: center; }
.about__panel {
  position: relative; width: 100%; max-width: 340px; aspect-ratio: 1/1;
  border-radius: var(--radius-lg); border: 1px solid var(--line);
  background: radial-gradient(circle at 50% 30%, rgba(139,92,246,0.12), transparent 70%), var(--glass);
}
.chip {
  position: absolute; padding: 7px 14px; border-radius: 100px; font-size: 0.78rem; font-weight: 600;
  background: rgba(255,255,255,0.05); border: 1px solid var(--line); color: var(--white);
}
.chip--1 { top: 6%; left: 4%; color: var(--cyan); }
.chip--2 { top: 12%; right: -6%; color: var(--purple); }
.chip--3 { bottom: 30%; left: -10%; color: var(--yellow); }
.chip--4 { bottom: 4%; right: 6%; color: var(--blue); }
.chip--5 { top: 44%; right: -14%; color: var(--cyan); }

/* ---------- Programs ---------- */
.programs__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.program-card {
  position: relative; padding: 30px 26px; border-radius: var(--radius-md);
  border: 1px solid var(--line); background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.program-card:hover {
  transform: translateY(-6px);
  border-color: rgba(34,211,238,0.5);
  box-shadow: 0 20px 40px -20px rgba(59,130,246,0.45);
}
.program-card:hover .program-card__icon { transform: scale(1.15) rotate(-4deg); }
.program-card__icon { display: inline-block; font-size: 2rem; margin-bottom: 16px; transition: transform .3s ease; }
.program-card h3 { margin-bottom: 10px; }
.program-card p { font-size: 0.92rem; margin-bottom: 16px; }
.program-card__link { color: var(--cyan); font-weight: 600; font-size: 0.9rem; }
.program-card__badge {
  position: absolute; top: 18px; right: 18px; font-size: 0.7rem; font-weight: 700;
  padding: 5px 12px; border-radius: 100px; background: var(--grad-primary); color: var(--white);
  text-transform: uppercase; letter-spacing: 0.04em;
}

/* ---------- Abacus feature ---------- */
.abacus-feature { background: var(--navy-2); overflow: hidden; }
.abacus-feature__bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 80% 20%, rgba(34,211,238,0.12), transparent 70%);
}
.abacus-feature__inner { position: relative; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.benefit-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; margin: 26px 0; }
.benefit-list li { display: flex; align-items: center; gap: 10px; font-weight: 500; color: var(--ink); }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.tag { padding: 7px 14px; border-radius: 100px; font-size: 0.8rem; border: 1px solid var(--line); color: var(--ink-dim); }
.abacus-anim { display: flex; justify-content: center; }
.anim-bead circle:first-child { animation: beadA var(--dur) ease-in-out infinite; }
.anim-bead circle:last-child { animation: beadB var(--dur) ease-in-out infinite; }
@keyframes beadA { 0%,100% { transform: translateX(0); } 50% { transform: translateX(30px); } }
@keyframes beadB { 0%,100% { transform: translateX(0); } 50% { transform: translateX(-30px); } }

/* ---------- Levels / Steps timeline ---------- */
.levels__track, .steps__track {
  position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; margin-top: 20px;
}
.steps__track { grid-template-columns: repeat(4, 1fr); }
.levels__line, .steps__line {
  position: absolute; top: 20px; left: 5%; right: 5%; height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--purple), var(--cyan));
  opacity: 0.4;
}
.level, .step { position: relative; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.level__num, .step__num {
  width: 42px; height: 42px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 0.85rem; color: var(--white);
  background: var(--navy); border: 2px solid var(--cyan); z-index: 1;
  box-shadow: 0 0 16px rgba(34,211,238,0.4);
}
.level__title, .step__title { font-size: 0.92rem; font-weight: 600; color: var(--white); }
.steps__cta { text-align: center; margin-top: 56px; }
.steps__cta h3 { margin-bottom: 18px; }

/* ---------- Why ---------- */
.why__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.why-card {
  padding: 28px 24px; border-radius: var(--radius-md); border: 1px solid var(--line);
  background: rgba(255,255,255,0.02); transition: transform .3s ease, border-color .3s ease;
}
.why-card:hover { transform: translateY(-4px); border-color: rgba(139,92,246,0.5); }
.why-card__icon { font-size: 1.8rem; display: block; margin-bottom: 14px; }
.why-card p { font-size: 0.9rem; margin-top: 8px; }

/* ---------- Modes ---------- */
.modes__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.mode-card { padding: 32px; border-radius: var(--radius-lg); border: 1px solid var(--line); background: var(--navy-2); }
.mode-card h3 { font-size: 1.35rem; margin-bottom: 10px; }
.mode-card ul { margin-top: 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.mode-card li { font-size: 0.88rem; color: var(--ink-dim); padding-left: 16px; position: relative; }
.mode-card li::before { content: '•'; position: absolute; left: 0; color: var(--cyan); }
.modes__cta { text-align: center; margin-top: 40px; }

/* ---------- Testimonials ---------- */
.carousel { position: relative; max-width: 680px; margin: 0 auto; }
.carousel__track { display: flex; transition: transform .5s cubic-bezier(.22,1,.36,1); }
.testimonial {
  min-width: 100%; text-align: center; padding: 40px 32px; border-radius: var(--radius-lg);
  border: 1px solid var(--line); background: var(--glass); backdrop-filter: blur(10px);
}
.testimonial p { font-size: 1.1rem; color: var(--ink); margin: 16px 0; font-style: italic; }
.testimonial__author { font-size: 0.85rem; color: var(--ink-dim); }
.testimonial__author em { font-style: normal; opacity: 0.6; }
.carousel__btn {
  position: absolute; top: 50%; transform: translateY(-50%); width: 42px; height: 42px; border-radius: 50%;
  background: rgba(255,255,255,0.05); border: 1px solid var(--line); font-size: 1.4rem; color: var(--white);
  display: flex; align-items: center; justify-content: center; transition: background .2s ease;
}
.carousel__btn:hover { background: rgba(59,130,246,0.25); }
.carousel__btn--prev { left: -54px; }
.carousel__btn--next { right: -54px; }
.carousel__dots { display: flex; justify-content: center; gap: 8px; margin-top: 24px; }
.carousel__dots button { width: 8px; height: 8px; border-radius: 50%; background: var(--line); transition: background .2s ease, width .2s ease; }
.carousel__dots button.is-active { background: var(--cyan); width: 22px; border-radius: 4px; }

/* ---------- Gallery ---------- */
.gallery__filters { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 32px; }
.filter-btn { padding: 9px 18px; border-radius: 100px; border: 1px solid var(--line); color: var(--ink-dim); font-size: 0.85rem; font-weight: 500; transition: all .2s ease; }
.filter-btn:hover { color: var(--white); }
.filter-btn.is-active { background: var(--grad-primary); color: var(--white); border-color: transparent; }
.gallery__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.gallery__item {
  position: relative; aspect-ratio: 4/3; border-radius: var(--radius-md); overflow: hidden;
  border: 1px solid var(--line); background: var(--navy-2);
  transition: transform .3s ease;
}
.gallery__item img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.gallery__item:hover img { transform: scale(1.06); }
.gallery__item:hover { transform: translateY(-4px); }
.gallery__caption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 12px 14px; font-size: 0.85rem; font-weight: 600; color: var(--white);
  background: linear-gradient(0deg, rgba(11,16,38,0.9), transparent);
}
.gallery__item.is-hidden { display: none; }
.gallery__note { text-align: center; margin-top: 24px; font-size: 0.82rem; color: var(--ink-dim); }
.gallery__note code { color: var(--cyan); }

.lightbox {
  position: fixed; inset: 0; z-index: 400; background: rgba(3,5,16,0.94);
  display: flex; align-items: center; justify-content: center;
}
.lightbox[hidden] { display: none; }
.lightbox__img { max-width: 88vw; max-height: 82vh; border-radius: 12px; }
.lightbox__close { position: absolute; top: 24px; right: 28px; font-size: 1.6rem; color: var(--white); }
.lightbox__nav { position: absolute; top: 50%; transform: translateY(-50%); font-size: 2.2rem; color: var(--white); padding: 12px; }
.lightbox__nav--prev { left: 16px; }
.lightbox__nav--next { right: 16px; }

/* ---------- Age groups ---------- */
.ages__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.age-card {
  text-align: center; padding: 36px 20px; border-radius: var(--radius-lg);
  border: 1px solid var(--line); background: rgba(255,255,255,0.02);
}
.age-card__range {
  display: block; font-family: var(--font-display); font-size: 2rem; font-weight: 700;
  background: var(--grad-accent); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.age-card__label { display: block; margin-top: 10px; color: var(--ink-dim); font-size: 0.92rem; }
.ages__note { text-align: center; margin-top: 24px; font-size: 0.85rem; color: var(--ink-dim); }

/* ---------- Parent CTA ---------- */
.parent-cta { text-align: center; overflow: hidden; }
.parent-cta__bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 40%, rgba(139,92,246,0.2), transparent 70%);
}
.parent-cta__inner { position: relative; max-width: 640px; margin: 0 auto; }
.parent-cta h2 { font-size: clamp(1.9rem, 4vw, 2.6rem); }
.parent-cta p { margin: 16px 0 30px; font-size: 1.05rem; }
.parent-cta__actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.parent-cta__phone { display: inline-block; margin-top: 26px; color: var(--cyan); font-weight: 600; }

/* ---------- FAQ ---------- */
.accordion__item { border-bottom: 1px solid var(--line); }
.accordion__trigger {
  width: 100%; text-align: left; display: flex; justify-content: space-between; align-items: center;
  padding: 22px 4px; font-size: 1.02rem; font-weight: 600; color: var(--white);
}
.accordion__trigger::after {
  content: '+'; font-size: 1.4rem; color: var(--cyan); transition: transform .3s ease;
}
.accordion__trigger[aria-expanded="true"]::after { transform: rotate(45deg); }
.accordion__panel {
  max-height: 0; overflow: hidden; transition: max-height .35s ease;
}
.accordion__panel p { padding: 0 4px 22px; font-size: 0.95rem; max-width: 68ch; }

/* ---------- Contact ---------- */
.contact__inner { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; }
.contact__list { display: flex; flex-direction: column; gap: 14px; margin: 22px 0 30px; }
.contact__list a { font-weight: 600; color: var(--white); }
.contact__list a:hover { color: var(--cyan); }

.contact__form {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
  padding: 32px; border-radius: var(--radius-lg); border: 1px solid var(--line); background: var(--navy-2);
}
.form-row { display: flex; flex-direction: column; gap: 6px; }
.form-row--full { grid-column: 1 / -1; }
.form-row label { font-size: 0.85rem; color: var(--ink-dim); }
.form-row input, .form-row select, .form-row textarea {
  padding: 12px 14px; border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: rgba(255,255,255,0.03); color: var(--white); transition: border-color .2s ease;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus { border-color: var(--cyan); }
.form-row input.is-invalid, .form-row select.is-invalid { border-color: #F87171; }
.form-error { font-size: 0.76rem; color: #F87171; min-height: 14px; }
.form-success {
  grid-column: 1 / -1; text-align: center; color: var(--cyan); font-size: 0.9rem;
  padding: 14px; border-radius: var(--radius-sm); background: rgba(34,211,238,0.08); border: 1px solid rgba(34,211,238,0.3);
}

/* ---------- Footer ---------- */
.footer { background: var(--navy-2); border-top: 1px solid var(--line); padding: 64px 0 0; }
.footer__inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; }
.footer__brand p { margin-top: 8px; font-size: 0.9rem; }
.footer__social { display: inline-flex; margin-top: 18px; color: var(--ink-dim); }
.footer__social:hover { color: var(--cyan); }
.footer__col h4 { font-size: 0.9rem; color: var(--white); margin-bottom: 14px; }
.footer__col { display: flex; flex-direction: column; gap: 10px; }
.footer__col a { font-size: 0.88rem; color: var(--ink-dim); }
.footer__col a:hover { color: var(--cyan); }
.footer__bottom { border-top: 1px solid var(--line); padding: 22px 0; text-align: center; }
.footer__bottom p { font-size: 0.82rem; }

/* ---------- Floating WhatsApp ---------- */
.fab-whatsapp {
  position: fixed; bottom: 28px; right: 24px; z-index: 150;
  width: 56px; height: 56px; border-radius: 50%; background: #25D366; color: var(--white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 24px -6px rgba(37,211,102,0.6);
  animation: pulse 2.4s ease-in-out infinite;
}
.fab-whatsapp:hover .fab-tooltip { opacity: 1; transform: translateX(0); }
.fab-tooltip {
  position: absolute; right: 68px; background: var(--navy-2); color: var(--white); padding: 6px 12px;
  border-radius: 8px; font-size: 0.8rem; white-space: nowrap; opacity: 0; transform: translateX(6px);
  transition: opacity .2s ease, transform .2s ease; border: 1px solid var(--line);
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37,211,102,0.5); }
  50% { box-shadow: 0 0 0 12px rgba(37,211,102,0); }
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed; bottom: 96px; right: 24px; z-index: 149; width: 44px; height: 44px; border-radius: 50%;
  background: var(--glass); border: 1px solid var(--line); color: var(--white); font-size: 1.1rem;
  backdrop-filter: blur(8px); transition: opacity .2s ease, transform .2s ease;
}
.back-to-top:hover { transform: translateY(-3px); }
.back-to-top[hidden] { display: none; }

/* ---------- Mobile sticky CTA ---------- */
.mobile-sticky-cta { display: none; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .nav-links { gap: 18px; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { height: 380px; margin-top: 20px; }
  .about__inner { grid-template-columns: 1fr; }
  .about__visual { order: -1; }
  .programs__grid { grid-template-columns: repeat(2, 1fr); }
  .abacus-feature__inner { grid-template-columns: 1fr; }
  .abacus-anim { order: -1; max-width: 280px; margin: 0 auto 20px; }
  .contact__inner { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .nav-links, .navbar__actions { display: none; }
  .menu-toggle { display: flex; }
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .why__grid { grid-template-columns: 1fr 1fr; }
  .modes__grid { grid-template-columns: 1fr; }
  .gallery__grid { grid-template-columns: repeat(2, 1fr); }
  .ages__grid { grid-template-columns: 1fr; }
  .levels__track { grid-template-columns: repeat(3, 1fr); row-gap: 32px; }
  .steps__track { grid-template-columns: repeat(2, 1fr); row-gap: 32px; }
  .levels__line, .steps__line { display: none; }
  .carousel__btn--prev { left: 0; }
  .carousel__btn--next { right: 0; }
  .contact__form { grid-template-columns: 1fr; }

  .mobile-sticky-cta {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 160;
    background: rgba(11,16,38,0.92); backdrop-filter: blur(14px);
    border-top: 1px solid var(--line);
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
    gap: 10px;
  }
  .mobile-sticky-cta a {
    flex: 1; text-align: center; padding: 12px 8px; border-radius: 100px; font-size: 0.82rem; font-weight: 600;
    border: 1px solid var(--line); color: var(--ink);
  }
  .mobile-sticky-cta a.is-primary { background: var(--grad-primary); color: var(--white); border-color: transparent; }
  .fab-whatsapp { bottom: 84px; }
  body { padding-bottom: 66px; }
}

@media (max-width: 640px) {
  section { padding: 72px 0; }
  .hero { padding-top: calc(var(--nav-h) + 40px); }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__cta .btn { width: 100%; }
  .float-card { font-size: 0.72rem; padding: 8px 12px; }
  .fc--1 { left: 0; top: -2%; }
  .fc--2 { right: -2%; }
  .fc--3 { left: -2%; }
  .fc--4 { right: 0; }
  .stats__grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .programs__grid { grid-template-columns: 1fr; }
  .why__grid { grid-template-columns: 1fr; }
  .gallery__grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .levels__track, .steps__track { grid-template-columns: 1fr 1fr; }
  .footer__inner { grid-template-columns: 1fr; gap: 32px; }
  .parent-cta__actions { flex-direction: column; }
  .parent-cta__actions .btn { width: 100%; }
}

@media (max-width: 380px) {
  .gallery__grid { grid-template-columns: 1fr; }
}