/* ===========================================
   TYPOGRAPHY SYSTEM
   Based on responsive scale guide
   =========================================== */

/* Base body text */
body {
  font-size: 16px; /* text-base */
  line-height: 1.6;
  font-weight: 400;
}

/* Body text utilities */
.text-base { font-size: 16px; }
.text-lg { font-size: 18px; }
.text-xl { font-size: 20px; }

/* H1: 36px → 48px → 60px → 72px | font-bold (700) */
h1, .h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  h1, .h1 {
    font-size: 48px;
  }
}

@media (min-width: 1024px) {
  h1, .h1 {
    font-size: 60px;
  }
}

@media (min-width: 1280px) {
  h1, .h1 {
    font-size: 72px;
  }
}

/* H2: 36px → 48px → 60px | font-black (900) */
h2, .h2 {
  font-size: 36px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  h2, .h2 {
    font-size: 48px;
  }
}

@media (min-width: 1024px) {
  h2, .h2 {
    font-size: 60px;
  }
}

/* H3: 24px → 30px | font-bold (700) */
h3, .h3 {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
}

@media (min-width: 768px) {
  h3, .h3 {
    font-size: 30px;
  }
}

/* H4: 20px → 24px | font-semibold (600) */
h4, .h4 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
}

@media (min-width: 768px) {
  h4, .h4 {
    font-size: 24px;
  }
}

/* Subheading / Lead text */
.subheading,
.lead {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.6;
  color: #666;
}

@media (min-width: 768px) {
  .subheading,
  .lead {
    font-size: 20px;
  }
}

/* Small text */
.text-sm {
  font-size: 14px;
}

.text-xs {
  font-size: 12px;
}

/* Font weights */
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-black { font-weight: 900; }