:root {
  color-scheme: dark;
  --bg: #050507;
  --surface: #111115;
  --ink: #f5f5f7;
  --muted: #96969d;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #2997ff;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 78% -12%, rgba(41, 151, 255, 0.2), transparent 34%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.site-shell {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 74px;
  border-bottom: 1px solid var(--line);
}

.site-brand {
  font-size: 15px;
  font-weight: 680;
  letter-spacing: -0.01em;
}

.site-origin {
  color: var(--muted);
  font-size: 13px;
}

.hero {
  display: grid;
  min-height: min(62vh, 650px);
  align-content: center;
  padding: 70px 0;
}

.hero__eyebrow {
  margin: 0 0 22px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(54px, 9vw, 124px);
  font-weight: 720;
  letter-spacing: -0.065em;
  line-height: 0.92;
  text-wrap: balance;
}

.hero__tagline {
  max-width: 31ch;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.35;
}

.archive {
  padding: 50px 0 110px;
  border-top: 1px solid var(--line);
}

.archive__header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  margin-bottom: 28px;
}

.archive__header h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 48px);
  letter-spacing: -0.045em;
}

.archive__count {
  color: var(--muted);
  font-size: 14px;
}

.talk-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.talk-card {
  position: relative;
  display: flex;
  min-height: 320px;
  overflow: hidden;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--card-accent, var(--accent)) 25%, transparent), transparent 42%),
    var(--surface);
  text-decoration: none;
  transition:
    transform 420ms cubic-bezier(0.2, 0.75, 0.2, 1),
    border-color 240ms ease;
}

.talk-card:hover {
  border-color: color-mix(in srgb, var(--card-accent, var(--accent)) 68%, white);
  transform: translateY(-6px);
}

.talk-card:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.talk-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: var(--muted);
  font-size: 13px;
}

.talk-card h3 {
  max-width: 14ch;
  margin: 50px 0 16px;
  font-size: clamp(30px, 4vw, 54px);
  letter-spacing: -0.05em;
  line-height: 1.02;
  text-wrap: balance;
}

.talk-card__subtitle {
  max-width: 36ch;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.45;
}

.talk-card__arrow {
  position: absolute;
  right: 28px;
  bottom: 25px;
  color: var(--card-accent, var(--accent));
  font-size: 28px;
  transition: transform 240ms ease;
}

.talk-card:hover .talk-card__arrow {
  transform: translateX(5px);
}

.empty {
  min-height: 260px;
  padding: 42px;
  border: 1px dashed var(--line);
  border-radius: 28px;
  color: var(--muted);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 30px 0 50px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 760px) {
  .talk-grid {
    grid-template-columns: 1fr;
  }

  .talk-card {
    min-height: 280px;
  }

  .site-origin {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
  }
}