/* ==============================
   GLOBAL BASE
============================== */

:root {
  --primary: #2563eb;
  --secondary: #1f2937;
  --bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --radius: 16px;
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ==============================
   LAYOUT HELPERS
============================== */

.section {
  padding: 90px 20px;
}

.container {
  max-width: 1200px;
  margin: auto;
}

.center {
  text-align: center;
}

/* ==============================
   TYPOGRAPHY
============================== */

h1 { font-size: clamp(2.5rem, 5vw, 3.2rem); }
h2 { font-size: clamp(2rem, 4vw, 2.4rem); }
h3 { font-size: 1.6rem; }

p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ==============================
   BUTTONS
============================== */

.btn {
  display: inline-block;
  padding: 14px 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  font-weight: 600;
  transition: 0.3s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* ==============================
   RESPONSIVE
============================== */

@media (max-width: 768px) {
  .section {
    padding: 60px 18px;
  }
}