@import url('https://fonts.googleapis.com/css2?family=Instrument+Sans:ital,wght@0,400;0,500;0,600;1,400&display=swap');

/* ─── Tokens ─────────────────────────────────────────────── */
:root {
  --bg:         #FCFBF7;
  --bg-alt:     #F5F3EC;
  --bg-subtle:  #F0EDE4;
  --text:       #15130F;
  --text-mute:  #6B6864;
  --text-faint: #A5A29C;
  --border:     #E6E2D8;
  --accent:     #C2410C;
  --accent-soft:#FBE8D7;

  --font: 'Instrument Sans', ui-sans-serif, system-ui, sans-serif;

  --max-w:    960px;
  --section:  clamp(4rem, 7vw, 6rem);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t:    0.2s;
}

[data-theme="dark"] {
  --bg:         #0D0C0A;
  --bg-alt:     #14130F;
  --text:       #F2EFE6;
  --text-mute:  #8C8880;
  --text-faint: #565350;
  --border:     #221F1A;
  --accent:     #E87A4B;
  --accent-soft:#2B1A10;
}

/* ─── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.55;
  font-feature-settings: 'ss01';
  -webkit-font-smoothing: antialiased;
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
}

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

/* ─── Layout ─────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
}

section { padding: var(--section) 0; }

/* ─── Nav ────────────────────────────────────────────────── */
nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.nav-logo {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.nav-link {
  font-size: 0.86rem;
  color: var(--text-mute);
  transition: color var(--t) var(--ease);
}
.nav-link:hover { color: var(--accent); }
.nav-link-active { color: var(--text); font-weight: 500; }

/* Theme toggle */
.theme-toggle {
  width: 30px; height: 30px;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--text-mute);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: color var(--t) var(--ease);
}
.theme-toggle:hover { color: var(--text); }
.theme-toggle svg { width: 15px; height: 15px; }
.icon-sun { display: none; }
.icon-moon { display: block; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="dark"] .icon-moon { display: none; }

/* ─── Hero ───────────────────────────────────────────────── */
.hero {
  padding: clamp(5rem, 12vw, 9rem) 0 clamp(4rem, 9vw, 7rem);
}
.hero h1 {
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 500;
  line-height: 1.0;
  letter-spacing: -0.035em;
  color: var(--text);
  margin-bottom: 2rem;
}
.hero h1 .mark {
  color: var(--accent);
  font-style: italic;
  font-weight: 400;
}
.hero-sub {
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  color: var(--text-mute);
  max-width: 50ch;
  line-height: 1.55;
  margin-bottom: 2.25rem;
  font-weight: 400;
}
.hero-meta {
  font-size: 0.82rem;
  color: var(--text-faint);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}
.hero-meta span { color: var(--text-mute); }
.hero-meta .sep {
  color: var(--text-faint);
  opacity: 0.5;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 0.6rem 1.1rem;
  border-radius: 6px;
  transition: background var(--t) var(--ease), color var(--t) var(--ease), border-color var(--t) var(--ease);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--text);
  color: var(--bg);
}
.btn-primary:hover { opacity: 0.88; }
.btn-secondary {
  color: var(--text-mute);
  border-color: var(--border);
}
.btn-secondary:hover {
  color: var(--text);
  border-color: var(--text-mute);
}
.btn svg { width: 13px; height: 13px; }
.btn-icon-meetup { width: 15px !important; height: 15px !important; }

.hero-note {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* ─── About ──────────────────────────────────────────────── */
.about {
  border-top: 1px solid var(--border);
  transition: border-color var(--t) var(--ease);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
@media (min-width: 720px) {
  .grid-2 {
    grid-template-columns: 160px 1fr;
    gap: clamp(2rem, 5vw, 4rem);
  }
}

.grid-1 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  line-height: 1.5;
}

.prose p {
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.6;
  max-width: 60ch;
}
.prose p + p { margin-top: 1rem; }
.prose p .muted { color: var(--text-mute); }

.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.55rem;
  margin-top: 1.5rem;
}
.tags li {
  font-size: 0.82rem;
  color: var(--text-mute);
  font-weight: 400;
}
.tags li:not(:last-child)::after {
  content: '·';
  margin-left: 0.55rem;
  color: var(--text-faint);
  opacity: 0.6;
}

/* ─── Pullquote ──────────────────────────────────────────── */
.pullquote {
  padding: clamp(3rem, 6vw, 5rem) 0;
  border-top: 1px solid var(--border);
  transition: border-color var(--t) var(--ease);
}
.pullquote p {
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 400;
  color: var(--text);
  max-width: 100%;
}
.pullquote .mark {
  color: var(--accent);
  font-style: italic;
  font-weight: 400;
}

/* ─── Events preview (homepage) ──────────────────────────── */
.events-preview {
  border-top: 1px solid var(--border);
  padding: clamp(3rem, 6vw, 5rem) 0;
}
.events-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}
.events-preview-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 540px) {
  .events-preview-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .events-preview-grid { grid-template-columns: repeat(3, 1fr); }
}

.event-preview-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-alt);
  text-decoration: none;
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}
.event-preview-card:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.event-preview-date {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}
.event-preview-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
}
.event-preview-talks {
  font-size: 0.8rem;
  color: var(--text-mute);
  margin-top: 0.25rem;
}

/* ─── Get involved ───────────────────────────────────────── */
.involved {
  border-top: 1px solid var(--border);
  transition: border-color var(--t) var(--ease);
}
.involved-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  transition: border-color var(--t) var(--ease);
}
@media (min-width: 720px) {
  .involved-grid { grid-template-columns: repeat(3, 1fr); }
}

.involve-item {
  display: flex;
  flex-direction: column;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: border-color var(--t) var(--ease);
}
@media (min-width: 720px) {
  .involve-item {
    padding: 1.75rem 1.5rem 1.75rem 0;
    border-bottom: none;
  }
  .involve-item + .involve-item {
    padding-left: 1.5rem;
    border-left: 1px solid var(--border);
  }
}

.involve-item h3 {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}
.involve-item p {
  font-size: 0.92rem;
  color: var(--text-mute);
  line-height: 1.55;
  margin-bottom: 0.75rem;
  flex: 1;
}
.involve-item a {
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  width: fit-content;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 2px;
  transition: opacity var(--t) var(--ease);
}
.involve-item a:hover { opacity: 0.7; }

/* ─── Sponsors ────────────────────────────────────────────── */
.sponsors {
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  transition: border-color var(--t) var(--ease);
}
.sponsors-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  margin-top: 1.5rem;
  align-items: center;
}
.sponsor-logo {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem 2rem;
  font-size: 0.8rem;
  color: var(--text-mute);
  min-width: 120px;
  text-align: center;
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

/* ─── Footer ─────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  transition: border-color var(--t) var(--ease);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.82rem;
  color: var(--text-mute);
}
.footer-inner a {
  color: var(--text-mute);
  transition: color var(--t) var(--ease);
}
.footer-inner a:hover { color: var(--accent); }
.footer-left { color: var(--text); font-weight: 500; }
.footer-organizers {
  color: var(--text-faint);
  font-size: 0.78rem;
}
.footer-organizers a { color: var(--text-faint); }
.footer-organizers a:hover { color: var(--accent); }

/* ─── Reveal (subtle) ────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }

/* ─── Hero variant (events / talks pages) ──────────────────── */
.hero-sm { padding: clamp(4rem, 10vw, 6rem) 0 clamp(2rem, 5vw, 3.5rem); }

/* ─── Talk hero ──────────────────────────────────────────── */
.talk-hero {
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--border);
}
.talk-hero-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.talk-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-mute);
  width: fit-content;
  transition: color var(--t) var(--ease);
}
.talk-back:hover { color: var(--accent); }
.talk-back svg { width: 14px; height: 14px; }
.talk-hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 720px;
}
.talk-summary {
  font-size: 1rem;
  color: var(--text-mute);
  line-height: 1.5;
  max-width: 60ch;
}
.talk-hero .talk-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--text);
}
.talk-speaker-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.talk-speaker-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid var(--border);
  object-fit: cover;        /* applies when element is <img> */
}
.talk-speaker-avatar--initials {
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}
.talk-speaker-info {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
.talk-speaker-name {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
}
.talk-speaker-role {
  font-size: 0.82rem;
  color: var(--text-mute);
}

/* ─── Talk layout ─────────────────────────────────────────── */
.talk-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  padding: clamp(2.5rem, 5vw, 4rem) 0 clamp(4rem, 8vw, 6rem);
}
/* ─── Talk body ──────────────────────────────────────────── */
.talk-body { width: 100%; }

/* ─── Talk video player (Video.js) ──────────────────────── */
.talk-video-wrap {
  width: 100%;
  margin-bottom: 2rem;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.talk-video-wrap .video-js {
  width: 100%;
  border-radius: 8px;
}
/* Accent colour on the progress bar and big-play button */
.talk-video-wrap .vjs-play-progress,
.talk-video-wrap .vjs-volume-level {
  background-color: var(--accent);
}
.talk-video-wrap .vjs-big-play-button {
  border-color: var(--accent);
}
.talk-video-wrap .vjs-big-play-button:hover,
.talk-video-wrap .vjs-big-play-button:focus {
  background-color: var(--accent);
  border-color: var(--accent);
}
.talk-placeholder {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  padding: 2.5rem;
  background: var(--bg-alt);
  border: 1px dashed var(--border);
  border-radius: 6px;
}
.talk-placeholder-icon { color: var(--text-faint); }
.talk-placeholder-icon svg { width: 32px; height: 32px; }
.talk-placeholder-heading {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-mute);
}
.talk-placeholder-body {
  font-size: 0.85rem;
  color: var(--text-faint);
  line-height: 1.5;
}
.talk-placeholder-body code {
  font-size: 0.85em;
  background: var(--border);
  padding: 0.1em 0.4em;
  border-radius: 3px;
}

/* ─── Talk sidebar ─────────────────────────────────────────── */
.talk-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
@media (min-width: 860px) {
  .talk-sidebar {
    flex-direction: row;
    align-items: flex-start;
  }
  .talk-sidebar .talk-card {
    flex: 1;
    min-width: 0;
  }
}
.talk-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.talk-card-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.talk-card-event-title {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
}
.talk-card-event-title:hover { color: var(--accent); }
.talk-card-meta {
  font-size: 0.82rem;
  color: var(--text-mute);
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}
.talk-card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  width: fit-content;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
  transition: opacity var(--t) var(--ease);
}
.talk-card-link:hover { opacity: 0.7; }
.talk-card-link svg { width: 12px; height: 12px; }
.talk-resources {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.talk-resource-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease);
}
.talk-resource-btn:hover { border-color: var(--accent); color: var(--accent); }
.talk-resource-btn svg { width: 13px; height: 13px; }

/* ─── Related talks ─────────────────────────────────────────── */
.talk-related-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.talk-related-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--t) var(--ease);
}
.talk-related-item:last-child { border-bottom: none; }
.talk-related-item:hover .talk-related-title { color: var(--accent); }
.talk-related-title {
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
  transition: color var(--t) var(--ease);
}
.talk-related-speaker {
  font-size: 0.78rem;
  color: var(--text-mute);
}