* {
  box-sizing: border-box;
}

:root {
  --bg: #0a0a0b;
  --card: rgba(255, 255, 255, 0.035);
  --card-strong: rgba(255, 255, 255, 0.06);
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --line: rgba(255, 255, 255, 0.1);
  --black-soft: rgba(0, 0, 0, 0.22);
  --radius: 28px;
  --max: 1120px;
}

html {
  scroll-behavior: smooth;
}

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

button,
a {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 10, 11, 0.9);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
}

.brand-button {
  border: 0;
  background: transparent;
  color: var(--text);
  text-align: left;
  padding: 0;
}

.brand-button span {
  display: block;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-button small {
  display: block;
  color: var(--muted);
  margin-top: 2px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.nav button {
  border: 0;
  background: transparent;
  color: rgba(255,255,255,0.72);
  padding: 6px 2px;
  transition: 0.2s ease;
}

.nav button:hover,
.nav button.active {
  color: white;
}

.section {
  padding: 28px 0;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 32px;
  padding: 64px 0 30px;
}

.pill {
  display: inline-block;
  border: 1px solid var(--line);
  background: var(--card-strong);
  color: rgba(255,255,255,0.82);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

h1 {
  font-size: clamp(3rem, 7vw, 5rem);
  line-height: 1;
  margin: 0;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.1;
  margin: 0;
}

h3 {
  margin: 0;
  font-size: 1.25rem;
}

p {
  margin: 0;
}

.hero-text {
  margin-top: 18px;
  max-width: 680px;
  color: var(--muted);
  font-size: 1.1rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  border: 0;
  border-radius: 18px;
  padding: 13px 20px;
  font-weight: 800;
  transition: 0.2s ease;
  display: inline-block;
}

.btn-primary {
  background: white;
  color: black;
}

.btn-secondary {
  background: var(--card-strong);
  color: white;
  border: 1px solid var(--line);
}

.btn:hover {
  transform: translateY(-1px);
}

.panel,
.box,
.card {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
}

.panel {
  padding: 24px;
  background: linear-gradient(180deg, rgba(255,255,255,0.055), rgba(255,255,255,0.025));
  box-shadow: 0 20px 60px rgba(0,0,0,0.26);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 11px;
  margin-top: 18px;
}

.stat {
  border: 1px solid var(--line);
  background: var(--black-soft);
  border-radius: 20px;
  padding: 16px;
}

.stat strong {
  display: block;
  font-size: 1.45rem;
}

.muted {
  color: var(--muted);
}

.note {
  margin-top: 18px;
  border: 1px solid var(--line);
  background: var(--black-soft);
  border-radius: 18px;
  padding: 16px;
  color: var(--muted);
}

.box {
  padding: 28px;
}

.section-head {
  margin-bottom: 22px;
}

.label {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.75rem;
  margin-bottom: 8px;
}

.grid-4,
.grid-3,
.grid-1 {
  display: grid;
  gap: 16px;
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-1 {
  grid-template-columns: 1fr;
}

.card {
  padding: 22px;
  text-align: left;
}

button.card {
  color: var(--text);
}

.card p {
  margin-top: 12px;
  color: var(--muted);
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 12px;
}

.badge {
  display: inline-block;
  border: 1px solid var(--line);
  background: var(--card-strong);
  border-radius: 999px;
  color: rgba(255,255,255,0.84);
  padding: 6px 11px;
  font-size: 0.78rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.selected-item {
  margin-top: 18px;
  border: 1px solid var(--line);
  background: var(--black-soft);
  border-radius: 20px;
  padding: 16px;
}

.selected-item-title {
  margin-top: 6px;
  font-size: 1.05rem;
  font-weight: 800;
}

.article {
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
}

.article p {
  margin-top: 24px;
  color: var(--muted);
  font-size: 1.1rem;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  text-align: center;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 900px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero,
  .grid-4,
  .grid-3,
  .stats {
    grid-template-columns: 1fr;
  }
}