:root {
  --primary: #0059e0;
  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --text: rgba(0, 0, 0, 0.88);
  --muted: rgba(0, 0, 0, 0.65);
  --border: #d9d9d9;
  --radius: 6px;
  --layout-max-width: 1400px;
  --layout-padding: 24px;
}

* {
  box-sizing: border-box;
}

/* =========================
     Base layout (footer bottom)
  ========================= */

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;

  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial;
  background: var(--bg);
  color: var(--text);
}

main.container {
  flex: 1;
}

/* =========================
     Header
  ========================= */

.site-header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--layout-max-width);
  margin: 0 auto;
  padding: 16px var(--layout-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
}

.logo-mark {
  color: var(--primary);
  display: inline-flex;
  align-items: center;
}

.logo-mark svg {
  display: block;
}

/* =========================
     Navigation
  ========================= */

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.login-link {
  padding: 6px 12px;
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
}

.login-link:hover {
  background: rgba(0, 0, 0, 0.04);
}

/* =========================
     Container
  ========================= */

.container {
  max-width: var(--layout-max-width);
  margin: 0 auto;
  padding: 0 var(--layout-padding);
}


/* =========================
     Buttons
  ========================= */

.btn {
  padding: 10px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
}

.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* =========================
     Hero
  ========================= */

.hero {
  margin: 48px 0;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
}

.hero-lead {
  margin-top: 16px;
  max-width: 560px;
  line-height: 1.8;
  color: var(--muted);
}

.hero-card h2 {
  margin-top: 0;
  margin-bottom: 12px;
}

/* =========================
     Cards & Grid
  ========================= */

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card.feature {
  padding: 20px 22px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* =========================
     Feature titles & text
  ========================= */

.feature-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 6px;
}

.card.feature p {
  margin: 0;
  margin-left: 34px;
  color: var(--muted);
  line-height: 1.7;
  max-width: 38ch;
}

/* =========================
     Icons
  ========================= */

.icon {
  width: 20px;
  display: inline-flex;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
  line-height: 1;
}

.icon.neutral {
  color: rgba(0, 0, 0, 0.65);
}
.icon.accent {
  color: var(--primary);
}
.icon.warning {
  color: #faad14;
}

/* =========================
    Platform overview
  ========================= */

.hero-card ul {
  margin: 12px 0 0;
  padding: 0;
}

.hero-card li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}

.hero-card li:last-child {
  margin-bottom: 0;
}

.hero-card li span:last-child {
  color: var(--muted);
  line-height: 1.6;
}

/* =========================
     Footer
  ========================= */

footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--muted);
}

.footer-contact {
  margin-top: 8px;
  font-size: 14px;
}

.footer-contact a {
  color: var(--primary);
  text-decoration: none;
}

.footer-contact a:hover {
  text-decoration: underline;
}

/* =========================
     Responsive
  ========================= */

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .card.feature p {
    margin-left: 0;
    max-width: none;
  }
}

@media (max-width: 1200px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .grid {
    grid-template-columns: 1fr;
  }
}