*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-card-hover: #222632;
  --text: #e8e8ed;
  --text-muted: #9498a6;
  --green: #34c759;
  --green-dim: rgba(52, 199, 89, 0.15);
  --orange: #f5853f;
  --orange-dim: rgba(245, 133, 63, 0.15);
  --border: rgba(255, 255, 255, 0.08);
  --radius: 12px;
  --max-width: 1080px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--green);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Nav */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.nav-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-brand img {
  width: 32px;
  height: 32px;
  border-radius: 7px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 140px 24px 80px;
  text-align: center;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--green), var(--orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.5;
}

.app-store-badge img {
  height: 54px;
  transition: opacity 0.2s;
}

.app-store-badge img:hover {
  opacity: 0.85;
}

.hero-platforms {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 12px;
}

/* Sections */
section {
  padding: 80px 24px;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--green);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 48px;
}

/* How It Works */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step {
  text-align: center;
  padding: 32px 24px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--green-dim);
  color: var(--green);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.step h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.step p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Hardware */
.hardware-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px;
}

.hardware-image img {
  width: 100%;
  max-width: 240px;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.spec-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 1rem;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.spec-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.spec-list li strong {
  font-size: 0.95rem;
  font-weight: 700;
}

.spec-list li span {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: background 0.2s;
}

.feature-card:hover {
  background: var(--bg-card-hover);
}

.feature-icon {
  font-size: 1.6rem;
  margin-bottom: 14px;
  display: block;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* App Spotlight */
#app {
  background: linear-gradient(180deg, var(--bg) 0%, #141820 100%);
}

.app-spotlight {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 48px;
  align-items: center;
}

.app-screenshot img {
  width: 100%;
  max-width: 560px;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.app-spotlight-text h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.app-spotlight-text p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
}

/* Pro */
#pro {
  background: linear-gradient(180deg, var(--bg) 0%, #141820 100%);
}

.pro-box {
  background: var(--bg-card);
  border: 1px solid var(--orange);
  border-radius: 16px;
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.pro-box h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pro-box .pro-subtitle {
  color: var(--orange);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.pro-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pro-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
}

.pro-list .check {
  color: var(--orange);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

.pro-list .label {
  color: var(--text-muted);
}

.pro-cta {
  text-align: center;
}

.pro-cta p {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 24px;
  line-height: 1.5;
}

/* AI (reuses .pro-box layout with green accent) */
#ai {
  background: linear-gradient(180deg, #141820 0%, var(--bg) 100%);
}

.pro-box-green {
  border-color: var(--green);
}

.pro-subtitle-green {
  color: var(--green);
}

.check-green {
  color: var(--green);
}

.ai-description {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 640px;
  margin-bottom: 20px;
}

/* Beta */
#beta {
  background: linear-gradient(180deg, var(--bg) 0%, #141820 50%, var(--bg) 100%);
  padding: 60px 24px;
}

.beta-inner {
  text-align: center;
  max-width: 540px;
}

.beta-description {
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.5;
  margin-bottom: 32px;
}

.beta-cta {
  display: inline-block;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--green);
  padding: 14px 32px;
  border: 1px solid var(--green);
  border-radius: var(--radius);
  transition: background 0.2s;
}

.beta-cta:hover {
  background: var(--green-dim);
  text-decoration: none;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1.05rem;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .step {
    padding: 24px 16px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hardware-grid {
    grid-template-columns: 1fr;
    padding: 32px 24px;
    gap: 32px;
  }

  .app-spotlight {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hardware-image {
    text-align: center;
  }

  .hardware-image img {
    max-width: 180px;
  }

  .app-screenshot img {
    max-width: 100%;
  }

  .pro-box {
    grid-template-columns: 1fr;
    padding: 32px 24px;
    gap: 32px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .nav-links {
    gap: 16px;
  }

  .section-title {
    font-size: 1.7rem;
  }

}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

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

  .nav-links .nav-hide-mobile {
    display: none;
  }
}