/* ALabs for Kids — Clean, High-Readability Redesign */
:root {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --text-muted: #475569;
  --border: #e2e8f0;
  --brand: #5845eb;
  --brand-dark: #4332c7;
  --brand-soft: #eef2ff;
  --accent: #0d9488;
  --radius: 14px;
  --radius-sm: 8px;
  --max-w: 1120px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* Announcement Bar */
.always-on-top-bar {
  background: var(--brand);
  color: #ffffff;
  font-size: 14px;
  padding: 8px 0;
}

.aot-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  text-align: center;
}

.aot-pill {
  background: rgba(255, 255, 255, 0.18);
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.02em;
}

.aot-cta {
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Header */
header.top {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}

.brand .tagline {
  font-weight: 600;
  color: var(--brand);
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--brand);
}

.langbtn {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.langbtn:hover {
  border-color: var(--brand);
  color: var(--brand);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--brand);
  color: #ffffff;
  font-weight: 700;
  font-size: 16px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--brand);
  transition: background 0.15s ease, transform 0.15s ease;
  cursor: pointer;
}

.btn:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
}

.btn.sm {
  padding: 8px 16px;
  font-size: 14px;
}

.btn.ghost {
  background: transparent;
  color: var(--brand);
}

.btn.ghost:hover {
  background: var(--brand-soft);
}

/* Hero */
.hero {
  padding: 64px 0 72px;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: center;
}

.kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand);
  background: var(--brand-soft);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.hero-headline {
  font-size: clamp(32px, 4.2vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
  font-weight: 800;
}

.dynamic-word {
  color: var(--brand);
}

.lede {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 58ch;
  margin: 0 0 24px;
}

.hero-quote {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--brand-soft);
  border-left: 4px solid var(--brand);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 28px;
  max-width: 58ch;
}

.hero-quote p {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.pills {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  max-width: 58ch;
}

.pills span {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pills span::before {
  content: "✓";
  color: var(--accent);
  font-weight: 800;
}

.hero-brand-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-md);
  text-align: center;
}

/* Cute Computer Engineer Lab Widget */
.lab-stage {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 16px 16px;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}

.lab-avatar-wrap {
  width: 140px;
  height: 140px;
  margin: 0 auto 10px;
  transition: transform 0.25s ease;
}

.lab-stage.is-boom .lab-avatar-wrap {
  animation: labShake 0.4s ease;
}

@keyframes labShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px) rotate(-3deg); }
  75% { transform: translateX(6px) rotate(3deg); }
}

.lab-flasks {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.flask-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ffffff;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.flask-btn:hover {
  transform: translateY(-2px) rotate(-4deg);
  border-color: var(--brand);
}

.flask-btn.selected {
  background: var(--brand);
  color: #ffffff;
  border-color: var(--brand);
}

.lab-status {
  font-size: 14px;
  font-weight: 700;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--brand-soft);
  color: var(--brand-dark);
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lab-stage.is-boom .lab-status {
  background: #fee2e2;
  color: #b91c1c;
}

.lab-stage.is-success .lab-status {
  background: #ccfbf1;
  color: #0f766e;
}

.lab-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin: 8px 0 0;
}

.hero-brand-img {
  width: 100%;
  border-radius: var(--radius-sm);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  margin-bottom: 16px;
}

.hbc-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  background: var(--brand-soft);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 6px;
}

.hero-brand-caption p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
}

/* Sections */
section {
  padding: 72px 0;
}

section.alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  max-width: 64ch;
  margin-bottom: 40px;
}

.section-head h2 {
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  font-weight: 800;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: 18px;
}

/* Stats Strip */
.stats-strip {
  padding: 40px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  padding: 8px 16px;
  border-left: 3px solid var(--brand-soft);
}

.stat-num {
  font-size: 24px;
  font-weight: 800;
  color: var(--brand);
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

/* Cards Grid */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.card-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.card h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 10px;
  line-height: 1.3;
}

.card p {
  margin: 0 0 16px;
  color: var(--text-muted);
  font-size: 16px;
}

.card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--text);
  font-size: 15px;
}

.card li {
  margin-bottom: 6px;
}

.step-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  color: var(--brand);
  background: var(--brand-soft);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

/* Callout Box */
.callout-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: var(--shadow-sm);
}

.callout-box h2 {
  margin: 0 0 10px;
  font-size: 28px;
  line-height: 1.25;
}

.callout-box p {
  margin: 0;
  color: var(--text-muted);
  max-width: 56ch;
}

/* Footer */
footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  font-size: 14px;
  color: var(--text-muted);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-bottom: 16px;
  font-weight: 600;
  color: var(--text);
}

.footer-nav a:hover {
  color: var(--brand);
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .stats-grid,
  .grid-2,
  .grid-3,
  .callout-box {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .pills {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 40px 0 48px;
  }

  section {
    padding: 48px 0;
  }
}