/* Section base */
.section {
  padding: var(--section-padding) 0;
}

.section--dark {
  background: var(--color-dark);
  color: var(--color-white);
}

.section--light {
  background: var(--color-gray-50);
}

/* Grid */
.grid {
  display: grid;
  gap: 32px;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--5 { grid-template-columns: repeat(5, 1fr); }

/* Flex utilities */
.flex { display: flex; }
.flex--center { align-items: center; justify-content: center; }
.flex--gap-16 { gap: 16px; }

/* Text alignment */
.text-center { text-align: center; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--border-radius);
  font: 500 16px/1 var(--font-body);
  cursor: pointer;
  border: none;
  transition: opacity 0.2s;
}

.btn:hover { opacity: 0.85; }

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-gray-300);
}

.btn--dark {
  background: var(--color-dark);
  color: var(--color-white);
}

/* Card */
.card {
  background: var(--color-white);
  border-radius: var(--border-radius);
  padding: 32px;
}

.card--dark {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-white);
}

.card--muted {
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-200);
}

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  h1 { font-size: 48px; letter-spacing: -2px; }
  h2 { font-size: 36px; letter-spacing: -1.5px; }

  .grid--5 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  :root {
    --section-padding: 60px;
  }

  h1 { font-size: 36px; letter-spacing: -1.5px; }
  h2 { font-size: 28px; letter-spacing: -1px; }

  body { font-size: 16px; }

  .grid--5,
  .grid--4,
  .grid--3,
  .grid--2 {
    grid-template-columns: 1fr;
  }

  .btn { width: 100%; justify-content: center; }
}