/* ════════════════════════════════════════
   DESIGN TOKENS (GLOBAL VARIABLES)
   ════════════════════════════════════════ */
:root {
  --blue-900: #1e3a8a;
  --blue-800: #1e40af;
  --blue-700: #1d4ed8;
  --blue-600: #2563eb;
  --blue-100: #dbeafe;
  --blue-50:  #eff6ff;
  --green-700: #15803d;
  --green-600: #16a34a;
  --green-100: #dcfce7;
  --green-50:  #f0fdf4;
  --orange-500: #f97316;
  --orange-600: #ea6c0a;
  --orange-50:  #fff7ed;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50:  #f8fafc;
  --white:     #ffffff;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow:    0 4px 16px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.09), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-lg: 0 20px 48px rgba(0,0,0,0.10), 0 8px 20px rgba(0,0,0,0.06);
  --radius-sm: 8px;
  --radius:    14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

/* ════════════════════════════════════════
   HTML RESET
   ════════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
}
body {
  font-family: 'DM Sans', sans-serif;
  background: var(--white);
  color: var(--slate-800);
  overflow-x: hidden;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button {
  font-family: inherit;
}

/* ════════════════════════════════════════
   TYPOGRAPHY
   ════════════════════════════════════════ */
h1, h2, h3, h4, h5 {
  font-family: 'Poppins', sans-serif;
  color: var(--slate-900);
  line-height: 1.2;
  font-weight: 700;
}
h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
}
h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
}
h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}
h4 {
  font-size: 1.05rem;
}
p {
  color: var(--slate-600);
}

/* ════════════════════════════════════════
   LAYOUT CONTAINERS
   ════════════════════════════════════════ */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.container-sm {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
section {
  padding: 5rem 1.5rem;
}
.section-alt {
  background: var(--slate-50);
}
.section-header {
  margin-bottom: 3rem;
}
.section-header-center {
  margin-bottom: 3rem;
  text-align: center;
}
.section-header-center .section-sub {
  max-width: 560px;
  margin: 0.75rem auto 0;
}
.section-sub {
  color: var(--slate-500);
  font-size: 1rem;
  margin-top: 0.75rem;
  line-height: 1.7;
}