/* ================================
   Boltzmind.ai Global Design
================================ */

:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --dark: #111111;
  --muted: #555;
  --accent: #00d084;
  --accent-hover: #00b374;
}

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

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

/* NAV */
.navbar {
  background: #0f0f0f;
  padding: 18px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-left {
  font-weight: 700;
  font-size: 1.2rem;
  color: #ffffff;
  letter-spacing: 0.5px;
}

.nav-right {
  display: flex;
  gap: 28px;
}

.nav-right a {
  color: #cfcfcf;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-right a:hover {
  color: var(--accent);
}

/* LAYOUT */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 24px;
}

.section {
  background: var(--surface);
  border-radius: 18px;
  padding: 48px;
  margin-bottom: 40px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.04);
}

/* TYPOGRAPHY */
h1 {
  font-size: 3rem;
  margin-bottom: 18px;
}

h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}

h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

p {
  color: var(--muted);
  margin-bottom: 14px;
}

.highlight {
  color: var(--accent);
  font-weight: 600;
}

/* HERO */
.hero {
  text-align: center;
  padding-top: 80px;
}

.tagline {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 20px auto;
}

/* GRID */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  margin-top: 30px;
}

.card {
  padding: 30px;
  border-radius: 14px;
  background: #fafafa;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}

.card img {
  height: 60px;
  margin-bottom: 18px;
}

.card a {
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 40px 20px;
  color: #777;
  font-size: 0.85rem;
}