:root {
  color-scheme: dark;
  font-family: Arial, Helvetica, sans-serif;
  --dark-glow: radial-gradient(ellipse at top, #292c32, #111214 65%);
  --panel-glow: radial-gradient(ellipse at top, #292c32, #22252b 65%);
  color: #f7f8fa;
  background: #111214;
}
* {
  box-sizing: border-box;
}
body {
  background: var(--dark-glow);
  min-height: 100vh;
  margin: 0;
  line-height: 1.6;
}
.shell {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}
.wide {
  max-width: 1160px;
}
h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.15;
}
h2 {
  font-size: 1.5rem;
}
a {
  color: #f7f8fa;
}
nav,
.toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.badge {
  border-left: 4px solid #c9cdd4;
  padding: 1rem;
  background: var(--panel-glow);
}
form {
  display: grid;
  gap: 0.7rem;
  margin: 1.5rem 0;
  background: var(--panel-glow);
}
input,
select,
button {
  font: inherit;
  min-height: 44px;
  padding: 0.65rem 0.9rem;
  border: 1px solid #bcb7af;
  border-radius: 0.2rem;
}
input,
select {
  color: #f7f8fa;
  background: var(--panel-glow);
  width: 100%;
}
button {
  color: #202329;
  background: #c9cdd4;
  cursor: pointer;
}
button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
:focus-visible {
  outline: 3px solid #93c5fd;
  outline-offset: 3px;
}
.check {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  margin: 1rem 0;
}
.check input {
  width: 1.2rem;
  min-height: 1.2rem;
  flex-shrink: 0;
  margin-top: 0.2rem;
}
small,
footer {
  color: #b6bcc6;
}
footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #626262;
}
#message:not(:empty) {
  padding: 1rem;
  border: 1px solid #c9cdd4;
  background: var(--panel-glow);
}
#message[data-error="true"] {
  border-color: #fca5a5;
  color: #fecaca;
}
#confirmation {
  padding: 1.5rem;
  border: 1px solid #cdd0d5;
  background: var(--panel-glow);
}
body[data-page="registration"] h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  letter-spacing: -0.035em;
}
body[data-page="registration"] h1 {
  margin-block: 1rem;
}
body[data-page="registration"] .badge {
  padding: 0.5rem 0.75rem;
  margin-block: 0.75rem;
}
body[data-page="registration"] .event-summary {
  padding-bottom: 0.75rem;
  margin-block: 0.75rem;
}
body[data-page="registration"] summary {
  padding-block: 0.5rem;
  cursor: pointer;
}
@media (max-width: 600px) {
  body[data-page="registration"] nav {
    gap: 0.25rem 0.75rem;
    font-size: 0.875rem;
  }
  body[data-page="registration"] #registration-form {
    margin-top: 1rem;
    padding: 1rem;
  }
}
.event-summary {
  color: #d1d4da;
  border-bottom: 1px solid #626262;
  padding-bottom: 1.5rem;
}
#registration-form {
  padding: 1.5rem;
  background: var(--panel-glow);
  border: 1px solid #626262;
}
#registration-form > button {
  margin-top: 0.5rem;
  font-weight: 700;
  background: linear-gradient(110deg, #fafafa, #c3c7ce);
}
.organizer-contacts {
  display: grid;
  gap: 0.75rem;
  margin-block: 1.5rem;
}
.organizer-contacts a {
  display: block;
  min-height: 48px;
  padding: 0.75rem 1rem;
  border: 1px solid #626262;
  text-underline-offset: 0.2em;
  background: var(--panel-glow);
}
#confirmation h3 {
  font-size: 1.1rem;
}
.shell a {
  overflow-wrap: anywhere;
}
@media (max-width: 359px) {
  #registration-form,
  #confirmation {
    padding: 1rem;
  }
}
.table-scroll {
  overflow-x: auto;
}
table {
  border-collapse: collapse;
  width: 100%;
}
th,
td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid #626262;
  vertical-align: top;
}
caption {
  text-align: left;
  color: #b6bcc6;
  padding: 0.5rem 0;
}
td {
  overflow-wrap: anywhere;
}
td button {
  margin: 0.2rem;
}
#capacity {
  max-width: 9rem;
}
.danger {
  background: var(--panel-glow);
  margin-top: 2rem;
  padding: 1rem;
  border: 1px solid #bcb7af;
}
#deletion-requests li {
  margin: 1rem 0;
}
[hidden] {
  display: none !important;
}
@media (max-width: 600px) {
  .toolbar button {
    width: 100%;
  }
  .shell {
    padding: 1.25rem 1rem;
  }
  th,
  td {
    padding: 0.5rem;
  }
}