:root {
  --bg-main: #0f1115;
  --bg-section: #151821;
  --text-primary: #ffffff;
  --text-secondary: #c7c9d1;
  --accent: var(--text-secondary);

  --border-soft: #23262f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.55;
}

/* =========================
   HEADER
   ========================= */

.site-header {
  background-color: #0b0d11;
  border-bottom: 1px solid var(--border-soft);
  min-height: 64px;
  display: flex;
  align-items: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px;
  width: 100%;
  display: flex;
  justify-content: space-between; /* logo left, nav right */
  align-items: center;
  flex-wrap: nowrap;
}

.main-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  margin-left: 24px;
  font-size: 14px;
  letter-spacing: 0.5px;
}

.main-nav a:visited {
  color: var(--text-secondary);
}

.main-nav a:hover {
  color: var(--accent);
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
}

.hero {
  border-bottom: 1px solid var(--border-soft);
  padding-bottom: 60px;
  margin-bottom: 60px;
}

.section {
  padding: 40px 0;
  border-bottom: 1px solid var(--border-soft);
}

.section:last-child {
  border-bottom: none;
}

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

h1 {
  font-size: 42px;
  margin-bottom: 10px;
}

h2 {
  font-size: 26px;
  margin-top: 60px;
  margin-bottom: 16px;
  color: var(--accent);
}

p {
  max-width: 820px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

ul {
  max-width: 820px;
}

li {
  margin-bottom: 10px;
  color: var(--text-secondary);
}

/* =========================
   CTA
   ========================= */

.cta {
  background-color: var(--bg-section);
  padding: 50px;
  margin-top: 80px;
  border: 1px solid var(--border-soft);
}

.cta a {
  display: inline-block;
  margin-right: 16px;
  margin-top: 12px;
  padding: 14px 22px;
  border: 1px solid var(--accent);
  color: var(--accent);
  text-decoration: none;
  font-weight: bold;
}

.cta a:hover {
  background-color: var(--accent);
  color: #000;
}

/* =========================
   FOOTER
   ========================= */

.site-footer {
  border-top: 1px solid var(--border-soft);
  margin-top: 100px;
  width: 100%;
  display: flex;
  justify-content: center;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 24px;
}

.site-footer p {
  max-width: none;
  margin: 6px 0;
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
}

/* =========================
   MOBILE
   ========================= */

@media (max-width: 768px) {
  h1 {
    font-size: 32px;
  }

  .container {
    padding: 60px 20px;
  }
}