:root {
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-primary: #2d6cdf;
  --color-primary-dark: #1f4ea3;
  --color-accent: #ffd166;
  --color-text: #1d2a3a;
  --color-muted: #5b6b82;
  --shadow-elevated: 0 12px 32px rgba(30, 55, 90, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 18px;
}
a {
  color: inherit;
  text-decoration: none;
}
a:hover {
  color: var(--color-primary-dark);
}

.container {
  width: min(100%, 1200px);
  margin: 0 auto;
  padding: 0 24px 20px;
}

header {
  text-align: center;
  background: transparent;
  top: 0;
  z-index: 20;
  padding: 16px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 999px;
  box-shadow: var(--shadow-elevated);
  backdrop-filter: blur(12px);
  margin: 0 auto;
  width: min(100%, 1200px);
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  list-style: none;
  padding: 0;
  margin: 0;
}
nav a {
  font-weight: 500;
  padding: 10px 16px;
  border-radius: 999px;
  transition: background-color 0.2s, color 0.2s;
}
nav a:hover,
nav a:focus-visible {
  background: rgba(45, 108, 223, 0.1);
  color: var(--color-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  background: var(--color-primary);
  color: #fff;
}
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid rgba(45, 108, 223, 0.16);
}
.btn-secondary:hover {
  background: rgba(45, 108, 223, 0.08);
  color: var(--color-primary-dark);
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
  align-items: center;
  padding: 72px 0;
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  margin-bottom: 20px;
  line-height: 1.2;
}
.hero p {
  font-size: 1.05rem;
  color: var(--color-muted);
  margin-bottom: 28px;
}
.hero-visual {
  position: relative;
}

.btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.section {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.section-title {
  font-size: xx-large;
  margin-bottom: 18px;
}
.section-subtitle {
  margin: 0 auto;
  max-width: 70%;
  color: var(--color-muted);
  padding: 0 0 20px 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}
.card {
  background: var(--color-surface);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow-elevated);
  transition: transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(30, 55, 90, 0.16);
}
.card h3 {
  margin: 0 0 12px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--color-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(45, 108, 223, 0.08);
}

.list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
}
.list-card {
  background: var(--color-surface);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-elevated);
}
.list-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(30, 55, 90, 0.16);
}
.list-card article,
.list-card > div {
  padding: 24px;
}

.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(45, 108, 223, 0.12);
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.split {
  display: block;
}
.split::after {
  content: "";
  clear: both;
}

.sidebar {
  float: right;
  width: 300px;
  margin: 0 0 20px 32px;
  background: var(--color-surface);
  padding: 24px;
  border-radius: 18px;
  box-shadow: var(--shadow-elevated);
}
.sidebar h4 {
  margin-top: 0;
}

.highlight {
  background: linear-gradient(
    135deg,
    rgba(255, 209, 102, 0.24),
    rgba(45, 108, 223, 0.22)
  );
  padding: 12px 16px;
  border-radius: 18px;
  font-weight: 600;
}

blockquote {
  margin: 28px 0;
  padding: 18px 24px;
  border-left: 4px solid var(--color-primary);
  background: rgba(45, 108, 223, 0.08);
  border-radius: 0 18px 18px 0;
  color: var(--color-muted);
  font-style: italic;
}

footer {
  background: var(--color-surface);
  margin-top: 39px;
  padding: 48px 0;
  border-top: 1px solid rgba(17, 34, 63, 0.08);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  align-items: center;
}

.social {
  display: flex;
  gap: 14px;
}
.social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(45, 108, 223, 0.12);
  color: var(--color-primary);
  font-weight: 600;
}

@media (max-width: 1024px) {
  .hero {
    gap: 32px;
    padding: 56px 0;
  }

  .sidebar {
    float: none;
    width: auto;
    margin: 0 0 24px 0;
    shape-outside: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    border-radius: 55px;
    flex-direction: column;
    align-items: flex-start;
  }
  .section-panel {
    padding: 44px 24px;
  }
  nav ul {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }
  nav a {
    width: 100%;
  }
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero .btn-group {
    justify-content: center;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  header {
    position: static;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .header-inner {
    border-radius: 0px;
    padding: 20px 18px 32px 18px;
  }
}