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

:root {
  --teal: #0fb3ad;
  --teal-dark: #0b8480;
  --dark: #4b4a4f;
  --black: #1a1a1a;
  --light-bg: #f7f7f7;
  --border: #e0e0e0;
  --font: 'Rubik', system-ui, sans-serif;
  --max-width: 960px;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  color: var(--dark);
  background: #fff;
  line-height: 1.6;
}

a {
  color: var(--teal-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  color: var(--teal);
}

/* ── Site header ── */
.site-header {
  border-bottom: 4px solid var(--black);
  padding: 1.25rem 0;
}

.site-header .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
}

.site-header .site-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--black);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-header .site-title:hover {
  color: var(--teal);
  text-decoration: none;
}

.site-header .subtitle {
  font-size: 0.85rem;
  color: #888;
  letter-spacing: 0.02em;
}

/* ── Main layout ── */
.page-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

/* ── Homepage ── */
.home-intro {
  max-width: 640px;
  margin-bottom: 3rem;
}

.home-intro h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--black);
  margin: 0 0 0.75rem;
  line-height: 1.2;
}

.home-intro p {
  font-size: 1rem;
  color: #666;
  margin: 0;
}

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

.talks-list li {
  border-bottom: 1px solid var(--border);
}

.talks-list a {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 0;
  color: var(--black);
  text-decoration: none;
  transition: color 0.15s;
}

.talks-list a:hover {
  color: var(--teal);
  text-decoration: none;
}

.talk-item-title {
  font-size: 1.05rem;
  font-weight: 500;
}

.talk-item-meta {
  font-size: 0.8rem;
  color: #999;
  white-space: nowrap;
  text-align: right;
}

/* ── Talk page ── */
.breadcrumb {
  font-size: 0.8rem;
  color: #999;
  margin-bottom: 1.25rem;
}

.breadcrumb a {
  color: #999;
}

.breadcrumb a:hover {
  color: var(--teal);
}

.breadcrumb span + span::before {
  content: " > ";
  margin: 0 0.3rem;
}

.talk-header {
  margin-bottom: 1.75rem;
}

.talk-header h1 {
  font-size: 2rem;
  font-weight: 400;
  color: var(--black);
  margin: 0 0 1.25rem;
  line-height: 1.25;
}

/* Event meta table */
.event-meta-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.93rem;
}

.event-meta-table td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.9rem;
  color: var(--dark);
}

/* ── Talk body layout ── */
.talk-body {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 720px) {
  .talk-body {
    grid-template-columns: 1fr;
  }

  .talk-sidebar {
    order: -1;
  }
}

.talk-content {
  font-size: 0.94rem;
  line-height: 1.6;
}

.talk-content h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--black);
  margin: 1.5rem 0 0.5rem;
}

.talk-content p {
  margin: 0 0 1rem;
}

.talk-content ul {
  margin: 0 0 1rem;
  padding-left: 1.4rem;
  list-style: square;
}

.talk-content ul li {
  margin-bottom: 0.4rem;
  padding-left: 0.2rem;
}

.talk-content hr {
  border: none;
  border-top: 1px dashed #ccc;
  margin: 1.5rem 0;
}

/* ── Speakers ── */
.talk-content .speaker-name-item {
  font-size: 0.94rem;
}

.talk-content .speaker-bio {
  margin: 0.4rem 0 1rem 1.6rem;
  font-size: 0.94rem;
}

/* ── Sidebar ── */
.talk-sidebar {
  position: sticky;
  top: 1.5rem;
}

.talk-sidebar figure {
  margin: 0 0 1.5rem;
}

.talk-sidebar img {
  width: 100%;
  display: block;
}

.talk-sidebar figcaption {
  font-size: 0.78rem;
  color: #999;
  margin-top: 0.5rem;
  line-height: 1.4;
}

.sidebar-panel {
  margin-bottom: 1.5rem;
}

.sidebar-panel h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--black);
  margin: 0 0 0.75rem;
}

.sidebar-panel ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-panel ul li {
  border-left: 3px solid var(--teal);
  padding: 0.3rem 0 0.3rem 0.75rem;
  margin-bottom: 0.4rem;
  font-size: 0.88rem;
  line-height: 1.3;
}

/* ── Footer ── */
.site-footer {
  background: var(--black);
  color: #aaa;
  font-size: 0.82rem;
  padding: 1.25rem 0;
  margin-top: 4rem;
}

.site-footer .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}