/* Ubicomp & Health Symposium — single-page styles */

:root {
  --bg: #f8f7f4;
  --bg-card: #fff;
  --text: #1a1a1a;
  --text-muted: #5a5a5a;
  --accent: #2c5282;
  --accent-hover: #1a365d;
  --accent-soft: rgba(44, 82, 130, 0.08);
  --border: #e5e3df;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.08);
  --radius: 10px;
  --radius-sm: 6px;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "DM Sans", system-ui, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-soft), transparent),
    radial-gradient(circle at 20% 30%, rgba(44, 82, 130, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(44, 82, 130, 0.03) 0%, transparent 45%);
  background-size: 100% 100%, 100% 100%, 100% 100%;
  background-position: 0 0, 0 0, 0 0;
  min-height: 100vh;
  position: relative;
}

/* Subtle dot pattern overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(0, 0, 0, 0.06) 1px, transparent 0);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}

.bg-shapes {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.4;
}

.bg-blob-1 {
  width:  min(40vw, 320px);
  height: min(40vw, 320px);
  background: linear-gradient(135deg, rgba(44, 82, 130, 0.12) 0%, rgba(44, 82, 130, 0.02) 100%);
  top: -10%;
  right: -5%;
}

.bg-blob-2 {
  width:  min(35vw, 280px);
  height: min(35vw, 280px);
  background: linear-gradient(225deg, rgba(44, 82, 130, 0.08) 0%, transparent 70%);
  bottom: 15%;
  left: -8%;
}

.bg-blob-3 {
  width:  min(25vw, 200px);
  height: min(25vw, 200px);
  background: radial-gradient(circle, rgba(44, 82, 130, 0.06) 0%, transparent 70%);
  top: 45%;
  right: 10%;
}

.hero,
main,
footer {
  position: relative;
  z-index: 1;
}

.hero {
  text-align: center;
  padding: 4rem 1.5rem 4.5rem;
  max-width: 52rem;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.4rem 0.9rem;
  border-radius: 2rem;
  margin-bottom: 1.25rem;
  border: 1px solid rgba(44, 82, 130, 0.15);
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.25rem, 5.5vw, 3rem);
  font-weight: 400;
  margin: 0 0 0.85rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
  position: relative;
}

.hero h1::after {
  content: "";
  display: block;
  width: 3rem;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  margin: 1rem auto 0;
  border-radius: 2px;
}

.tagline {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin: 0 0 0.5rem;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}

.date-place {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin: 0 0 2.25rem;
  font-weight: 500;
}

.cta {
  display: inline-block;
  padding: 0.95rem 2rem;
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(44, 82, 130, 0.35);
}

main {
  max-width: 56rem;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.intro {
  margin-bottom: 2.5rem;
  padding: 2rem 2.25rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
}

.intro p {
  margin: 0 0 1rem;
}

.intro p:last-child {
  margin-bottom: 0;
}

.sponsor-logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  margin: 1.5rem 0;
}

.sponsor-logo {
  max-height: 3.5rem;
  width: auto;
  object-fit: contain;
}

.schedule {
  margin-bottom: 2.5rem;
  padding: 2rem 2.25rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
}

.schedule h2,
.organizers h2,
.faq h2 {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 400;
  margin: 0 0 0.25rem;
  color: var(--text);
  border-left: 3px solid var(--accent);
  padding-left: 0.85rem;
}

.schedule-note {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.schedule-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.schedule-table thead {
  background: var(--accent-soft);
}

.schedule-table th,
.schedule-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.schedule-table tbody tr:last-child td {
  border-bottom: none;
}

.schedule-table th {
  font-weight: 600;
  color: var(--text);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.schedule-table td:first-child {
  white-space: nowrap;
  color: var(--text-muted);
  font-weight: 500;
}

.schedule-table tbody tr:hover {
  background: rgba(0, 0, 0, 0.02);
}

.organizers {
  margin-bottom: 2.5rem;
  padding: 2rem 2.25rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
}

.organizers h2 {
  margin-bottom: 1.5rem;
}

.organizer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem 2rem;
}

.organizer {
  flex: 0 0 auto;
  width: 7.25rem;
}

.organizer-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  text-decoration: none;
  color: inherit;
  padding: 0.75rem;
  margin: -0.75rem;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
}

.organizer-link:hover {
  background: var(--accent-soft);
}

.organizer-link:hover .organizer-name {
  color: var(--accent);
  text-decoration: underline;
}

.organizer-photo {
  width: 5.5rem;
  height: 5.5rem;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 0.6rem;
  background: var(--border);
  border: 2px solid var(--border);
  transition: border-color 0.2s ease;
}

.organizer-link:hover .organizer-photo {
  border-color: var(--accent);
}

.organizer-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
}

.faq {
  padding: 2rem 2.25rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
}

.faq h2 {
  margin-bottom: 1.5rem;
}

.faq article {
  margin-bottom: 1.75rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
}

.faq article:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.faq h3 {
  font-family: var(--sans);
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
  color: var(--text);
}

.faq p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.faq a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.faq a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

footer p {
  margin: 0;
  max-width: 44rem;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

footer a:hover {
  text-decoration: underline;
}

footer .sponsor-logos {
  margin-top: 1.75rem;
}

@media (min-width: 640px) {
  .hero {
    padding: 5rem 1.5rem 5rem;
  }

  main {
    padding-bottom: 5rem;
  }

  .intro,
  .schedule,
  .organizers,
  .faq {
    padding: 2.25rem 2.5rem;
  }
}