* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
}

h1,h2,h3,h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}
/* =========================
   BASE RESET
========================= */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
}

/* CONTAINER */
.container {
  width: 100%;
  max-width: 1200px;
  padding-inline: 24px;
  margin-inline: auto;
}
/* =================================
   DESIGN SYSTEM BASE (NEUTRAL)
   ================================= */

:root {
  /* Color Tokens (Default / Fallback) */
  --bg-body: #ffffff;
  --bg-header: #ffffff;
  --bg-footer: #0f172a;

  --text-primary: #0f172a;
  --text-secondary: #475569;

  --accent-primary: #2563eb;
  --accent-secondary: #38bdf8;

  /* UI */
  --radius: 12px;
  --shadow-soft: 0 10px 30px rgba(0,0,0,.08);
  --transition: all .3s ease;
}

/* Global */
body {
  background: var(--bg-body);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, BlinkMacSystemFont;
}

.site-header {
  background: var(--bg-header);
}

.site-footer {
  background: var(--bg-footer);
  color: #fff;
}

.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  padding: 14px 28px;
  border-radius: var(--radius);
  transition: var(--transition);
}

.btn-primary:hover {
  filter: brightness(1.1);
}
/* ===============================
   HEADER
   =============================== */

.site-header {
  position: relative;
  z-index: 50;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
}

.logo a {
  font-size: 22px;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-menu ul {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===============================
   HERO BASE
   =============================== */

.hero {
  padding: 120px 0 100px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 60px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.1;
}

.hero p {
  margin-top: 20px;
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 520px;
}

.hero .btn-primary {
  margin-top: 32px;
}

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

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }
}