:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --removed: #dc2626;
  --added: #16a34a;
  --hero-from: #0f172a;
  --hero-to: #1e3a5f;
  --radius: 12px;
  --shadow: 0 1px 3px rgb(15 23 42 / 8%), 0 12px 40px rgb(15 23 42 / 6%);
  --font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, monospace;
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

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

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgb(255 255 255 / 92%);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.9375rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

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

.nav-cta {
  padding: 0.45rem 1rem;
  background: var(--accent);
  color: #fff !important;
  border-radius: 8px;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--accent-hover);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  padding: 0.4rem 0.65rem;
  font-size: 1.25rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }

  .nav.is-open {
    display: flex;
  }

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

/* Hero */
.hero {
  background: linear-gradient(145deg, var(--hero-from) 0%, var(--hero-to) 55%, #1e40af 100%);
  color: #f1f5f9;
  padding: 4.5rem 0 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

.hero-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #93c5fd;
  margin-bottom: 0.75rem;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.85rem);
  line-height: 1.15;
  margin: 0 0 1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-lead {
  font-size: 1.125rem;
  color: #cbd5e1;
  margin: 0 0 1.75rem;
  max-width: 36rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: #fff;
  color: var(--hero-from);
}

.btn-primary:hover {
  background: #f1f5f9;
}

.btn-ghost {
  background: rgb(255 255 255 / 12%);
  color: #fff;
  border: 1px solid rgb(255 255 255 / 25%);
}

.btn-ghost:hover {
  background: rgb(255 255 255 / 18%);
}

.hero-meta {
  font-size: 0.875rem;
  color: #94a3b8;
}

.hero-meta strong {
  color: #e2e8f0;
}

.hero-visual {
  background: rgb(255 255 255 / 6%);
  border: 1px solid rgb(255 255 255 / 12%);
  border-radius: var(--radius);
  padding: 0.75rem;
  box-shadow: 0 24px 60px rgb(0 0 0 / 35%);
}

/* Image carousel */
.carousel {
  position: relative;
  user-select: none;
}

.carousel-viewport {
  overflow: hidden;
  border-radius: 8px;
  background: #0b1220;
}

.carousel-track {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
  .carousel-track {
    transition: none;
  }
}

.carousel-slide {
  flex: 0 0 100%;
  margin: 0;
  position: relative;
}

.carousel-slide img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: top center;
}

.carousel-caption {
  margin: 0;
  padding: 0.65rem 0.85rem;
  font-size: 0.8125rem;
  line-height: 1.4;
  color: #cbd5e1;
  background: linear-gradient(to top, rgb(11 18 32 / 95%), rgb(11 18 32 / 70%));
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
}

.carousel--hero .carousel-caption {
  color: #e2e8f0;
}

.carousel-ui {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.carousel-btn {
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid rgb(255 255 255 / 25%);
  border-radius: 999px;
  background: rgb(255 255 255 / 10%);
  color: #f1f5f9;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.carousel-btn:hover {
  background: rgb(255 255 255 / 20%);
  border-color: rgb(255 255 255 / 40%);
}

.carousel-dots {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem;
}

.carousel-dot {
  width: 0.55rem;
  height: 0.55rem;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: rgb(255 255 255 / 35%);
  cursor: pointer;
  transition: transform 0.15s, background 0.15s;
}

.carousel-dot.is-active {
  background: #93c5fd;
  transform: scale(1.25);
}

.showcase-band {
  padding: 3.5rem 0 4rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.section-head--light h2 {
  color: var(--text);
}

.carousel--wide .carousel-viewport {
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.carousel--wide .carousel-caption {
  position: static;
  color: var(--muted);
  background: var(--bg);
  border-top: 1px solid var(--border);
  font-size: 0.9375rem;
}

.carousel--wide .carousel-btn {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.carousel--wide .carousel-btn:hover {
  background: var(--bg);
  border-color: var(--accent);
}

.carousel--wide .carousel-dot {
  background: var(--border);
}

.carousel--wide .carousel-dot.is-active {
  background: var(--accent);
}

/* Sections */
section {
  padding: 4rem 0;
}

.section-head {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 2.75rem;
}

.section-head h2 {
  font-size: clamp(1.65rem, 3vw, 2rem);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.4rem;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--muted);
}

.formats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
}

.format-pill {
  padding: 0.45rem 0.9rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  counter-reset: step;
}

@media (max-width: 768px) {
  .steps {
    grid-template-columns: 1fr;
  }
}

.step {
  text-align: center;
  padding: 1rem;
}

.step-num {
  width: 2.5rem;
  height: 2.5rem;
  margin: 0 auto 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  border-radius: 50%;
}

.download-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  max-width: 36rem;
  margin: 0 auto;
  text-align: center;
}

.download-box h3 {
  margin: 0 0 0.5rem;
}

.download-box .version {
  color: var(--muted);
  font-size: 0.9375rem;
  margin-bottom: 1.5rem;
}

.download-links {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.download-links .btn {
  justify-content: center;
  width: 100%;
}

.btn-download {
  background: var(--accent);
  color: #fff;
}

.btn-download:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn-secondary {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.req-list {
  text-align: left;
  font-size: 0.875rem;
  color: var(--muted);
  margin: 1.25rem 0 0;
  padding-left: 1.2rem;
}

.privacy-band {
  background: #ecfdf5;
  border-top: 1px solid #a7f3d0;
  border-bottom: 1px solid #a7f3d0;
}

.privacy-band p {
  margin: 0;
  text-align: center;
  color: #065f46;
  font-weight: 500;
}

.faq {
  max-width: 40rem;
  margin: 0 auto;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin-bottom: 0.65rem;
}

.faq summary {
  font-weight: 600;
  cursor: pointer;
}

.faq p {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.site-footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.875rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.footer-inner a {
  color: var(--muted);
}