:root {
  --bg: #0b0c0e;
  --bg-raised: #131417;
  --ink: #edeae3;
  --ink-dim: #8a8d93;
  --line: #22242a;
  --orange: #f2a900;
  --orange-dim: #7a5700;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

[hidden] {
  display: none !important;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */

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

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
}

.brand img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.brand .btc {
  color: var(--orange);
}

.site-nav {
  display: flex;
  gap: 20px;
  font-family: var(--mono);
  font-size: 13px;
}

.site-nav a {
  color: var(--ink-dim);
  text-decoration: none;
  transition: color 0.15s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"]:hover {
  color: var(--orange);
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
}

/* Hero */

.hero {
  padding: 72px 0 40px;
}

.eyebrow {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--orange);
}

h1 {
  margin: 0 0 18px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.hero-small h1 {
  font-size: clamp(28px, 4vw, 36px);
}

.sub {
  margin: 0;
  max-width: 46ch;
  font-size: 17px;
  color: var(--ink-dim);
}

/* Block card */

.block-card {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 6px;
  margin-bottom: 48px;
}

.block-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--orange);
}

.status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
}

.block-body {
  padding: 6px 18px 18px;
}

.kv {
  margin: 0;
}

.kv-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 14px;
}

.kv-row dt {
  color: var(--ink-dim);
}

.kv-row dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.kv-row dd.highlight {
  color: var(--orange);
  font-weight: 600;
}

/* Countdown */

.countdown {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 18px 0 14px;
  background: var(--line);
  border: 1px solid var(--line);
}

.countdown-cell {
  background: var(--bg);
  padding: 14px 6px 12px;
  text-align: center;
}

.countdown-num {
  display: block;
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.countdown-label {
  display: block;
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}

.countdown-live {
  margin: 18px 0 14px;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--bg);
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  color: var(--orange);
}

.note {
  margin: 0 0 18px;
  font-size: 13px;
  font-style: italic;
  color: var(--ink-dim);
}

/* Buttons */

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  display: inline-block;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 13px;
  text-decoration: none;
  color: var(--ink);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  border-color: var(--orange);
  color: var(--orange);
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}

/* Sections */

.section {
  padding: 40px 0 56px;
  border-top: 1px solid var(--line);
}

.section-title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
}

.section p {
  margin: 0;
  max-width: 58ch;
  color: var(--ink-dim);
}

/* Talks */

.talks {
  margin: 0 0 56px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.talk {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.talk-date {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-dim);
  padding-top: 3px;
}

.talk-title {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
}

.talk-speaker {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--orange);
}

.talk-desc {
  margin: 0 0 10px;
  font-size: 14.5px;
  color: var(--ink-dim);
}

.talk-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.talk-link {
  font-family: var(--mono);
  font-size: 13px;
  text-decoration: underline;
  text-decoration-color: var(--orange-dim);
  text-underline-offset: 4px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

.talk-link:hover,
.talk-link:focus-visible {
  color: var(--orange);
  text-decoration-color: var(--orange);
}

.talks-state {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-dim);
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--line);
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 24px;
  padding-bottom: 32px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-dim);
}

.site-footer a {
  color: var(--ink-dim);
  transition: color 0.15s ease;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--orange);
}

/* Accessibility */

:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Responsive */

@media (max-width: 560px) {
  .site-header .wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .hero {
    padding-top: 48px;
  }

  .kv-row {
    grid-template-columns: 90px 1fr;
  }

  .talk {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .talk-date {
    padding-top: 0;
  }
}

@media (max-width: 380px) {
  .countdown-num {
    font-size: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}