:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --border: #222222;
  --text: #f0f0f0;
  --muted: #888888;
  --accent: #7c6af7;
  --accent-dim: #4e42c4;
  --radius: 12px;
  --max-w: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

nav { display: flex; align-items: center; gap: 28px; }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

nav a:hover { color: var(--text); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover { background: var(--accent-dim); transform: translateY(-1px); }

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
  padding: 7px 18px;
}

.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover { color: var(--text); border-color: #444; }

/* ── Hero ── */
.hero {
  position: relative;
  padding: 120px 0 100px;
  overflow: hidden;
}

.hero .container { position: relative; z-index: 1; }

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 24px;
}

.accent { color: var(--accent); }

.hero-sub {
  color: var(--muted);
  font-size: 1.15rem;
  max-width: 520px;
  margin-bottom: 40px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-bg {
  position: absolute;
  top: -40%;
  right: -20%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(124, 106, 247, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

/* ── Features ── */
.features {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.section-sub {
  color: var(--muted);
  margin-bottom: 56px;
  font-size: 1.05rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover { border-color: var(--accent); transform: translateY(-2px); }

.icon {
  font-size: 1.4rem;
  color: var(--accent);
  margin-bottom: 18px;
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

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

/* ── About ── */
.about {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

.about-inner {
  display: flex;
  align-items: center;
  gap: 80px;
  flex-wrap: wrap;
}

.about-text { flex: 1; min-width: 280px; }

.about-text h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.about-text p { color: var(--muted); margin-bottom: 16px; font-size: 1rem; }

.about-visual { flex-shrink: 0; }

.visual-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px 64px;
  text-align: center;
}

.visual-num {
  display: block;
  font-size: 4rem;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -0.05em;
  line-height: 1;
}

.visual-label {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 8px;
}

/* ── CTA ── */
.cta {
  padding: 100px 0;
  border-top: 1px solid var(--border);
}

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

.cta h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.cta p { color: var(--muted); margin-bottom: 32px; }

.cta-form {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-form input {
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  width: 280px;
  outline: none;
  transition: border-color 0.2s;
}

.cta-form input:focus { border-color: var(--accent); }

.form-msg {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--accent);
  min-height: 22px;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

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

/* ── Responsive ── */
@media (max-width: 640px) {
  .hero { padding: 80px 0 70px; }
  .about-inner { gap: 40px; }
  .visual-box { padding: 36px 48px; }
}