:root {
  --bg: #f4f4f5;
  --surface: #ffffff;
  --ink: #18181b;
  --muted: #71717a;
  --line: #e4e4e7;
  --accent: #2563eb;
  --font: "Inter", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

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

.app {
  max-width: 720px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--surface);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.site-nav-mobile-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 1rem;
}

.site-nav-brand {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-nav-brand:hover,
.site-nav-brand:focus-visible {
  color: var(--accent);
}

.site-nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  margin: 0;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.site-nav-toggle:hover,
.site-nav-toggle:focus-visible {
  background: var(--bg);
  border-color: #d4d4d8;
}

.site-nav-toggle-icon {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 18px;
  height: 14px;
}

.site-nav-toggle-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-nav.is-open .site-nav-toggle-icon span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-nav.is-open .site-nav-toggle-icon span:nth-child(2) {
  opacity: 0;
}

.site-nav.is-open .site-nav-toggle-icon span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.site-nav-panel[hidden] {
  display: none !important;
}

.site-nav.is-open .site-nav-panel {
  display: block;
  border-top: 1px solid var(--line);
  background: #fff;
}

.site-nav-inner {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.5rem;
}

.site-nav-link {
  display: block;
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.site-nav-link:hover,
.site-nav-link:focus-visible {
  background: var(--bg);
  color: var(--accent);
}

.site-nav-link.is-current {
  background: var(--ink);
  color: #fff;
}

.site-nav-link.is-loading {
  color: var(--muted);
}

.profile-header {
  position: static;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.profile-top {
  display: flex;
  gap: 1.25rem;
  align-items: center;
  padding: 1.25rem 1.25rem 0.75rem;
}

.profile-logo {
  flex-shrink: 0;
  color: inherit;
  text-decoration: none;
}

.profile-logo:hover .profile-avatar,
.profile-logo:focus-visible .profile-avatar {
  opacity: 0.85;
}

.profile-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  background: #f4f4f5;
  transition: opacity 0.15s ease;
}

.profile-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-meta h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.profile-title-link {
  color: inherit;
  text-decoration: none;
}

.profile-title-link:hover,
.profile-title-link:focus-visible {
  color: var(--accent);
}

.profile-handle {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.profile-bio {
  margin: 0.35rem 0 0;
  font-size: 0.88rem;
}

.profile-stats {
  margin: 0.45rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

.profile-stats strong {
  color: var(--ink);
}

.filters {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0 1.25rem 0.85rem;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.filters::-webkit-scrollbar {
  display: none;
}

.filter {
  flex: 0 0 auto;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.filter:hover {
  background: var(--bg);
}

.filter.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.feed {
  padding: 0 0 2.5rem;
}

.event-list {
  display: flex;
  flex-direction: column;
}

.deep-link-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 0;
  padding: 0.7rem 1.25rem;
  border-bottom: 1px solid #dbeafe;
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  scroll-margin-top: 4.5rem;
}

.deep-link-banner-clear {
  margin: 0;
  padding: 0.35rem 0.7rem;
  border: 1px solid #bfdbfe;
  border-radius: 999px;
  background: #fff;
  color: #1d4ed8;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.deep-link-banner-clear:hover,
.deep-link-banner-clear:focus-visible {
  background: #dbeafe;
}

.event-item {
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 4.5rem;
}

.event-item.is-pinned,
.event-item.is-deep-linked {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08), transparent 48%);
  box-shadow: inset 3px 0 0 var(--accent);
}

.event-item:last-child {
  border-bottom: none;
}

.event-media {
  width: 100%;
  background: #e4e4e7;
  overflow: hidden;
}

.event-media img {
  display: block;
  width: 100%;
  height: auto;
}

.event-placeholder {
  display: grid;
  place-items: center;
  min-height: 220px;
  padding: 2rem 1.5rem;
  background: linear-gradient(145deg, #f4f4f5, #e4e4e7);
  color: var(--muted);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
}

.event-body {
  padding: 1.15rem 1.25rem 1.5rem;
}

.event-category {
  margin: 0 0 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.event-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.event-date {
  margin: 0.5rem 0 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
}

.event-location {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.event-desc {
  margin: 0.75rem 0 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: #3f3f46;
  white-space: pre-wrap;
}

.event-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.85rem;
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
}

.event-toggle:hover {
  text-decoration: underline;
}

.event-toggle-icon {
  display: inline-block;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transition: transform 0.3s ease;
}

.event-toggle.is-open .event-toggle-icon {
  transform: rotate(-135deg) translateY(1px);
}

.event-details {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease, opacity 0.3s ease;
  opacity: 0;
}

.event-details.is-open {
  grid-template-rows: 1fr;
  opacity: 1;
}

.event-details-inner {
  overflow: hidden;
  padding-top: 0;
  transition: padding-top 0.35s ease;
}

.event-details.is-open .event-details-inner {
  padding-top: 0.85rem;
}

.event-detail-loading,
.event-detail-empty {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.event-detail-time {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
}

.event-detail-block {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.event-detail-label {
  margin: 0 0 0.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.event-desc-rich {
  white-space: normal;
}

.event-desc-rich p {
  margin: 0 0 0.75rem;
}

.event-desc-rich p:last-child {
  margin-bottom: 0;
}

.event-address-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.event-address-link:hover {
  color: var(--accent);
}

.event-address-line {
  display: block;
  font-size: 0.92rem;
  line-height: 1.45;
}

.event-directions {
  display: inline-block;
  margin-top: 0.35rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
}

.event-contact-link {
  font-size: 0.92rem;
  font-weight: 500;
}

.event-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.event-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
}

.event-action-btn--register {
  min-width: 9.5rem;
  padding: 0.7rem 1.25rem;
  font-size: 0.95rem;
}

.event-action-btn:hover {
  opacity: 0.9;
  color: #fff;
}

.loading,
.empty,
.error-box {
  padding: 3rem 1.25rem;
  text-align: center;
  color: var(--muted);
}

.loading-stack {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 100%;
  margin: 0 auto 1rem;
}

.loading-card {
  border-bottom: 1px solid var(--line);
}

.loading-card .loading-image {
  aspect-ratio: 16 / 9;
  background: linear-gradient(110deg, #ececec 8%, #f5f5f5 18%, #ececec 33%);
  background-size: 200% 100%;
  animation: shimmer 1.2s linear infinite;
}

.loading-card .loading-lines {
  padding: 1rem 1.25rem 1.5rem;
}

.loading-card .loading-lines span {
  display: block;
  height: 0.75rem;
  margin-bottom: 0.55rem;
  border-radius: 4px;
  background: linear-gradient(110deg, #ececec 8%, #f5f5f5 18%, #ececec 33%);
  background-size: 200% 100%;
  animation: shimmer 1.2s linear infinite;
}

.loading-card .loading-lines span:first-child {
  width: 28%;
}

.loading-card .loading-lines span:nth-child(2) {
  width: 72%;
  height: 1rem;
}

.loading-card .loading-lines span:nth-child(3) {
  width: 55%;
}

@keyframes shimmer {
  to { background-position: -200% 0; }
}

.error-box {
  color: #b42318;
  background: #fef3f2;
  margin: 1rem;
  border-radius: 12px;
  border: 1px solid #fecdca;
}

.site-foot {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.25rem;
  font-size: 0.78rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (min-width: 900px) {
  .app {
    max-width: 1280px;
    border-left: none;
    border-right: none;
    padding: 0 2rem;
  }

  .site-nav-mobile-bar {
    display: none;
  }

  .site-nav-panel {
    display: block !important;
    border-top: none;
  }

  .site-nav-panel[hidden] {
    display: block !important;
  }

  .site-nav-inner {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.35rem;
    padding: 0.75rem 0;
    overflow-x: visible;
  }

  .site-nav-link {
    flex: 0 0 auto;
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    font-size: 0.78rem;
    white-space: nowrap;
  }

  .profile-header {
    position: static;
    top: auto;
  }

  .profile-top {
    padding: 1.75rem 0 1rem;
  }

  .profile-meta h1 {
    font-size: 1.75rem;
  }

  .profile-handle {
    display: none;
  }

  .profile-bio {
    font-size: 0.95rem;
  }

  .filters {
    padding: 0 0 1.25rem;
    flex-wrap: wrap;
    overflow-x: visible;
  }

  .feed {
    padding: 0.5rem 0 3rem;
  }

  .event-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .event-item {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    background: var(--surface);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  }

  .event-item:last-child {
    border-bottom: 1px solid var(--line);
  }

  .event-media img {
    aspect-ratio: 16 / 9;
    object-fit: cover;
  }

  .event-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1rem 1.15rem 1.25rem;
  }

  .event-title {
    font-size: 1.15rem;
  }

  .event-date {
    font-size: 0.88rem;
  }

  .loading-stack {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .loading-card {
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
  }
}

@media (min-width: 1200px) {
  .event-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .loading-stack {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .profile-top {
    gap: 1rem;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .profile-avatar {
    width: 60px;
    height: 60px;
  }

  .profile-meta h1 {
    font-size: 1.15rem;
  }

  .filters {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .event-title {
    font-size: 1.2rem;
  }
}