:root {
  --indigo: #3f51b5;
  --indigo-dark: #303f9f;
  --sky: #03a9f4;
  --ink: #1a1c2b;
  --muted: #5b5f73;
  --bg: #ffffff;
  --bg-soft: #f4f5fb;
  --border: #e3e5f0;
  --radius: 12px;
}

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

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

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
a { color: var(--indigo); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, #eef1fd 0%, #f8fbff 55%, #eefaff 100%);
  border-bottom: 1px solid var(--border);
  padding: 72px 0 64px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}
.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.brand-icon { width: 36px; height: 36px; border-radius: 8px; }
.brand-name { font-weight: 700; letter-spacing: 0.02em; color: var(--indigo-dark); }

.hero h1 { font-size: 2.9rem; line-height: 1.15; margin-bottom: 16px; }
.accent {
  background: linear-gradient(90deg, var(--indigo), var(--sky));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.sub { color: var(--muted); font-size: 1.08rem; margin-bottom: 26px; max-width: 34em; }

.install-block {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #14162a;
  color: #d6e4ff;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 1rem;
}
.install-block code { font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; }
.install-block code::before { content: "$ "; color: #6ee7a0; }
.copy-btn {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 0.82rem;
  cursor: pointer;
}
.copy-btn:hover { background: rgba(255, 255, 255, 0.22); }

.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 18px; }
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--indigo);
  color: #fff;
  box-shadow: 0 6px 18px rgba(63, 81, 181, 0.35);
}
.btn-primary:hover { background: var(--indigo-dark); }
.btn-secondary {
  background: #fff;
  color: var(--indigo-dark);
  border: 1px solid var(--border);
}

.meta-row { font-size: 0.88rem; color: var(--muted); }
.meta-row a { color: var(--muted); text-decoration: underline; }

/* ---------- Terminal / slider ---------- */
.terminal {
  background: #14162a;
  border-radius: 14px;
  box-shadow: 0 24px 60px rgba(26, 28, 60, 0.28);
  overflow: hidden;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  background: #1d2038;
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }
.terminal-title {
  margin-left: 10px;
  color: #9aa3c7;
  font-size: 0.8rem;
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}
.slides { position: relative; min-height: 260px; }
.slide {
  position: absolute;
  inset: 0;
  padding: 20px 22px;
  margin: 0;
  color: #e8ecff;
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.86rem;
  line-height: 1.65;
  opacity: 0;
  transition: opacity 0.45s ease;
  overflow-x: auto;
}
.slide.active { opacity: 1; }
.kw { color: #c792ea; }
.str { color: #a5e78a; }
.fn { color: #82aaff; }
.out { color: #7d86ad; }

.slider-dots { display: flex; justify-content: center; gap: 8px; padding: 12px 0 14px; }
.sdot {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: none;
  background: #3a3f63;
  cursor: pointer;
  padding: 0;
}
.sdot.active { background: var(--sky); }

/* ---------- Modules ---------- */
.modules { padding: 72px 24px; text-align: center; }
.modules h2, .why h2 { font-size: 1.9rem; margin-bottom: 10px; }
.section-sub { color: var(--muted); margin-bottom: 40px; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  text-align: left;
}
.card {
  display: block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--indigo);
  box-shadow: 0 10px 28px rgba(63, 81, 181, 0.14);
}
.card-icon { font-size: 1.6rem; margin-bottom: 10px; }
.card h3 { font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; color: var(--indigo-dark); margin-bottom: 6px; }
.card p { color: var(--muted); font-size: 0.94rem; }

/* ---------- Why band ---------- */
.band { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.why { padding: 64px 24px; text-align: center; }
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
  margin-top: 36px;
  text-align: left;
}
.why-item h3 { margin-bottom: 8px; font-size: 1.05rem; }
.why-item p { color: var(--muted); font-size: 0.95rem; }

/* ---------- Footer ---------- */
.footer { padding: 32px 0; }
.footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
}
.footer a { color: var(--muted); text-decoration: none; font-size: 0.9rem; }
.footer a:hover { color: var(--indigo); }
.copyright { margin-left: auto; color: #9aa0b8; font-size: 0.85rem; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero { padding: 48px 0 40px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 2.2rem; }
  .slides { min-height: 280px; }
}