:root {
  --bg: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --soft: #f8fafc;
  --soft-alt: #f6f3ff;
  --primary: #6d4aff;
  --primary-dark: #5536d8;
  --blue: #2962ff;
  --dark: #111827;
  --dark-2: #1e1b4b;
  --container: 1180px;
  --radius: 28px;
  --shadow: 0 20px 60px rgba(15, 23, 42, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { width: min(calc(100% - 40px), var(--container)); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, 0.88); backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}
.nav-wrap {
  min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
.brand-text { min-width: 0; max-width: 320px; }
.brand img { width: 58px; height: 58px; object-fit: contain; border-radius: 0; box-shadow: none; }
.brand-title { font-weight: 800; font-size: 1.12rem; letter-spacing: -0.02em; line-height: 1.05; }
.brand-subtitle { color: var(--muted); font-size: 0.8rem; line-height: 1.22; white-space: normal; }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 24px; }
.nav-links a { font-size: 0.96rem; color: #334155; }
.nav-links a:hover { color: var(--primary); }

.button {
  display: inline-flex; align-items: center; justify-content: center; border-radius: 18px;
  padding: 14px 22px; font-weight: 700; transition: 0.2s ease;
}
.button.small { padding: 12px 16px; font-size: 0.95rem; }
.button.primary {
  background: linear-gradient(135deg, var(--blue), var(--primary)); color: white;
  box-shadow: 0 14px 28px rgba(109, 74, 255, 0.22);
}
.button.primary:hover { transform: translateY(-1px); }
.button.secondary { border: 1px solid #cbd5e1; background: white; color: var(--text); }
.button.secondary:hover { border-color: #a78bfa; color: var(--primary); }

.hero {
  background:
    radial-gradient(circle at 10% 20%, rgba(41, 98, 255, 0.08), transparent 28%),
    radial-gradient(circle at 90% 15%, rgba(109, 74, 255, 0.1), transparent 24%),
    linear-gradient(135deg, #f8fbff 0%, #ffffff 45%, #f5f0ff 100%);
}
.hero-grid { display: grid; grid-template-columns: 1.02fr 0.98fr; gap: 48px; align-items: center; padding: 72px 0 64px; }
.eyebrow, .section-label {
  display: inline-block; color: var(--primary); font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.18em; font-size: 0.78rem;
}
.hero h1 { margin: 14px 0 0; font-size: clamp(3.2rem, 8vw, 6rem); line-height: 0.95; letter-spacing: -0.06em; }
.hero h1 span {
  background: linear-gradient(135deg, var(--blue), var(--primary)); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.hero-subtitle { margin: 18px 0 0; font-size: clamp(1.3rem, 3vw, 2rem); font-weight: 700; letter-spacing: -0.03em; }
.hero-text { max-width: 640px; margin: 18px 0 0; font-size: 1.08rem; color: var(--muted); }
.hero-meta { margin-top: 22px; display: flex; align-items: center; flex-wrap: wrap; gap: 14px; color: #475569; font-weight: 500; }
.meta-with-icon { display: inline-flex; align-items: center; gap: 10px; }
.meta-with-icon img { width: 22px; height: 22px; }
.dot { width: 6px; height: 6px; border-radius: 999px; background: #94a3b8; }
.hero-actions { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 14px; }
.card { background: rgba(255, 255, 255, 0.88); border: 1px solid rgba(226, 232, 240, 0.9); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-visual {
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-visual img { width: min(100%, 560px); border-radius: 0; object-fit: contain; }

.section { padding: 88px 0; }
.section.alt { background: linear-gradient(180deg, #fbfbfe 0%, #f6f4ff 100%); }
.section h2, .light-heading { margin: 10px 0 0; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.08; letter-spacing: -0.04em; }
.section p { color: var(--muted); font-size: 1.04rem; }
.section-center { text-align: center; max-width: 840px; margin: 0 auto 36px; }
.about-grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 34px; align-items: start; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.feature-card, .topic-card, .speaker-card { padding: 24px; }
.feature-card h3, .topic-card h3, .speaker-card h3 { margin: 0; font-size: 1.1rem; }
.feature-card p, .speaker-card p { margin: 8px 0 0; }
.icon { width: 52px; height: 52px; margin-bottom: 14px; }

.speaker-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.speaker-card { text-align: center; }
.speaker-photo {
  width: 128px;
  height: 128px;
  margin: 0 auto 14px;
  border-radius: 999px;
  object-fit: cover;
  image-rendering: auto;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
}

.external-link {
  font-weight: 700;
  text-decoration: none;
}

.external-link:hover {
  text-decoration: underline;
  color: var(--primary);
}

.external-link::after {
  margin-left: 4px;
  font-size: 0.75em;
  opacity: 0.65;
}

.organizers-after-agenda { padding-top: 34px; }

.topic-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.topic-card { min-height: 170px; }
.icons-grid .topic-card { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.agenda-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.agenda-card {
  max-width: 920px;
  margin: 0 auto;
}
.agenda-list li {
  display: flex;
  gap: 14px;
  align-items: start;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
}
.agenda-list li:nth-child(odd) {
  background: #f8fafc;
  border-color: #e2e8f0;
}
.agenda-list strong {
  flex: 0 0 180px;
  font-size: 0.98rem;
}
.agenda-list span,
.agenda-list .talk-entry {
  flex: 1 1 auto;
  color: var(--muted);
}
.talk-entry {
  display: block;
}
.talk-speaker {
  color: var(--muted);
}
.talk-details {
  display: inline;
}
.talk-details summary {
  display: inline;
  /* color: var(--primary); */
  cursor: pointer;
  font-weight: 700;
}
.talk-details summary:hover {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.talk-details p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-band {
  background: #151c55;
  color: #fff;
  overflow: hidden;
}
.footer-strip {
  display: grid;
  grid-template-columns: 1.08fr 1.24fr 1.12fr 112px 300px;
  align-items: stretch;
  min-height: 178px;
}
.footer-block {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 30px 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.22);
}
.footer-block h2 {
  margin: 0 0 18px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
}
.footer-block p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.82rem;
  line-height: 1.65;
}
.footer-date-list,
.footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.footer-contact-list { gap: 18px; margin-bottom: 12px; }
.footer-date-list li,
.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.footer-date-list img,
.footer-contact-list img {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  filter: brightness(0) invert(1);
  opacity: 0.82;
}
.footer-date-list strong,
.footer-contact-list strong {
  display: block;
  color: #fff;
  font-size: 0.76rem;
  font-weight: 800;
  line-height: 1.25;
}
.footer-date-list span,
.footer-contact-list span {
  display: block;
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.72rem;
  line-height: 1.4;
  overflow-wrap: anywhere;
}
.website-url {
  max-width: 240px;
  overflow-wrap: normal;
  word-break: normal;
}
.footer-link {
  margin-top: auto;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  white-space: nowrap;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.footer-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 20px 12px;
}
.footer-qr img {
  width: 92px;
  height: 92px;
  padding: 0;
  border-radius: 4px;
  background: transparent;
  display: block;
}
.footer-qr span {
  color: #6f85d8;
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.footer-city {
  min-height: 178px;
  margin-right: calc((100vw - min(calc(100vw - 40px), var(--container))) / -2);
  background-image: linear-gradient(90deg, rgba(21, 28, 85, 0.18), rgba(21, 28, 85, 0)), url("assets/footer-edinburgh.webp");
  background-size: cover;
  background-position: center;
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0 100%);
}

.site-footer { padding: 22px 0 26px; border-top: 1px solid rgba(226, 232, 240, 0.9); background: #fff; }
.footer-wrap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, max-content));
  align-items: center;
  column-gap: 56px;
  row-gap: 16px;
  justify-content: center;
}
.footer-inline {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
}
.footer-brand { gap: 12px; }
.footer-logo { display: block; height: auto; }
.footer-logo-edinburgh { width: 172px; }
.footer-logo-huawei { width: 132px; }
.site-footer strong {
  display: inline-block;
  margin: 0;
  color: #64748b;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.footer-org {
  display: inline-block;
  color: #0f172a;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-transform: none;
}
.footer-org-edinburgh {
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}
.footer-org-huawei {
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}
.site-footer a { color: var(--primary); }

@media (max-width: 1080px) {
  .nav-links { display: none; }
  .hero-grid, .about-grid, .topic-grid, .speaker-grid { grid-template-columns: 1fr 1fr; }
  .hero-grid { grid-template-columns: 1fr; }
  .footer-wrap { grid-template-columns: repeat(2, minmax(0, max-content)); row-gap: 16px; }
  .footer-strip { grid-template-columns: 1fr 1fr; }
  .footer-block { min-height: 178px; }
  .footer-qr { min-height: 178px; border-right: 1px solid rgba(255, 255, 255, 0.22); }
  .footer-city {
    grid-column: 1 / -1;
    min-height: 220px;
    margin-right: 0;
    clip-path: none;
  }
}

@media (max-width: 720px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .button.small { display: none; }
  .about-grid, .feature-grid, .topic-grid, .speaker-grid { grid-template-columns: 1fr; }
  .footer-wrap { grid-template-columns: 1fr; gap: 10px; }
  .footer-inline { white-space: normal; }
  .footer-logo-edinburgh { width: min(100%, 170px); }
  .footer-logo-huawei { width: min(100%, 132px); }
  .footer-strip { grid-template-columns: 1fr; }
  .footer-block {
    min-height: auto;
    padding: 26px 20px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  }
  .footer-qr {
    min-height: 150px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  }
  .footer-city { min-height: 190px; }
  .section { padding: 72px 0; }
  .nav-wrap { min-height: 74px; }
  .brand-subtitle { display: none; }
  .hero-meta { gap: 10px; }
  .dot { display: none; }
  .agenda-list li { display: grid; grid-template-columns: 1fr; gap: 4px; }
  .agenda-list strong { flex: none; }
}