/* ==================== RESET & BASE ==================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ==================== LAYOUT ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 4rem 1.5rem; }

/* ==================== TYPOGRAPHY ==================== */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: #1a1a1a;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
p { margin-bottom: 1rem; color: #4a4a4a; }

/* ==================== UTILITIES ==================== */
.text-center { text-align: center; }
.text-white { color: #ffffff; }
.text-muted { color: #6b7280; }

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary { background: #2563eb; color: #ffffff; }
.btn-primary:hover { background: #1d4ed8; text-decoration: none; }

.btn-outline { background: transparent; color: #2563eb; border: 2px solid #2563eb; }
.btn-outline:hover { background: #2563eb; color: #ffffff; text-decoration: none; }

/* ==================== NAVIGATION ==================== */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1a1a1a;
  text-decoration: none;
}

.nav-links { display: flex; gap: 1.5rem; list-style: none; }

.nav-links a {
  color: #4a4a4a;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover { color: #2563eb; text-decoration: none; }

/* ==================== HERO ==================== */
.hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: #ffffff;
}

.hero h1 { color: #ffffff; font-size: 3rem; margin-bottom: 1rem; }
.hero p { color: #cbd5e1; font-size: 1.25rem; max-width: 600px; margin: 0 auto 2rem; }

/* ==================== CARDS ==================== */
.card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 1.5rem;
  transition: box-shadow 0.2s;
}

.card:hover { box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); }

/* ==================== GRID ==================== */
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

/* ==================== FOOTER ==================== */
.footer {
  background: #1e293b;
  color: #94a3b8;
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.875rem;
}

.footer a { color: #cbd5e1; }

/* ==================== FORMS ==================== */
input, textarea, select {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  width: 100%;
  transition: border-color 0.2s;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  section { padding: 2rem 1rem; }
  .nav-links { gap: 1rem; }
}