:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c2330;
  --muted: #5f6b7a;
  --border: #dde1e7;
  --primary: #1f5fbf;
  --primary-hover: #194f9f;
  --danger: #b42318;
  --danger-bg: #fdecea;
  --success: #146c43;
  --success-bg: #e6f4ea;
  --warning: #8a5a00;
  --warning-bg: #fff4d6;
  --radius: 8px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161c;
    --surface: #1b2129;
    --text: #e6e9ee;
    --muted: #9aa5b4;
    --border: #2f3743;
    --primary: #5b9bf0;
    --primary-hover: #7aaff4;
    --danger: #f2877d;
    --danger-bg: #3a1d1b;
    --success: #6fcf97;
    --success-bg: #17301f;
    --warning: #f0c060;
    --warning-bg: #352a12;
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
}

a {
  color: var(--primary);
}
a:hover {
  color: var(--primary-hover);
}

h1 {
  font-size: 1.6rem;
  margin: 0 0 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
h2 {
  font-size: 1.15rem;
  margin: 0 0 0.75rem;
}
h3 {
  font-size: 1rem;
  margin: 0 0 0.5rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.site-header .brand {
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.site-header nav {
  display: flex;
  gap: 1.25rem;
}
.site-header nav a {
  text-decoration: none;
}
.site-header .account {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 3rem;
}

.crumbs {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.page-head p {
  margin: 0;
}
.actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}
.section-head h2 {
  margin: 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.muted {
  color: var(--muted);
}
.small {
  font-size: 0.85rem;
}
.notes {
  white-space: pre-wrap;
  margin: 1rem 0 0;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
}
.stat-label {
  color: var(--muted);
  font-size: 0.85rem;
}
.stat-value {
  font-size: 1.35rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
}
.table th,
.table td {
  text-align: left;
  padding: 0.55rem 0.5rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.table th {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  font-weight: 600;
}
.table tbody tr:last-child td {
  border-bottom: none;
}
.table .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.row-actions {
  text-align: right;
  white-space: nowrap;
}
.row-actions > * + * {
  margin-left: 0.35rem;
}

/* Details list */
.details {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem 1.5rem;
  margin: 0;
}
.details dt {
  color: var(--muted);
  font-size: 0.85rem;
}
.details dd {
  margin: 0;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}
.badge-active {
  background: var(--success-bg);
  color: var(--success);
}
.badge-upcoming {
  background: var(--warning-bg);
  color: var(--warning);
}
.badge-locked {
  background: var(--danger-bg);
  color: var(--danger);
}
.badge-ended,
.badge-vacant {
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--border);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  text-decoration: none;
  cursor: pointer;
  line-height: 1.3;
}
.btn:hover {
  border-color: var(--muted);
  color: var(--text);
}
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: #fff;
}
.btn-danger {
  color: var(--danger);
}
.btn-danger:hover {
  background: var(--danger-bg);
  border-color: var(--danger);
  color: var(--danger);
}
.btn-small {
  padding: 0.2rem 0.6rem;
  font-size: 0.85rem;
}
form.inline {
  display: inline;
}
.narrow {
  max-width: 28rem;
}
.field.checkbox label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: normal;
}
.field.checkbox input {
  width: auto;
}

/* Flash messages */
.flash {
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}
.flash-success {
  background: var(--success-bg);
  color: var(--success);
}
.flash-error {
  background: var(--danger-bg);
  color: var(--danger);
}

/* Forms */
.form fieldset {
  border: none;
  padding: 0;
  margin: 0 0 1.25rem;
}
.form legend {
  font-weight: 650;
  margin-bottom: 0.5rem;
}
.field {
  margin-bottom: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.field label {
  font-weight: 550;
  font-size: 0.9rem;
}
.req {
  color: var(--danger);
}
.hint {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 0;
}
.error {
  color: var(--danger);
  font-size: 0.85rem;
  margin: 0;
}

input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
  width: 100%;
}
input[type="file"] {
  padding: 0.35rem;
}
.has-error input,
.has-error select,
.has-error textarea {
  border-color: var(--danger);
}
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: -1px;
  border-color: var(--primary);
}

.input-prefix {
  display: flex;
}
.input-prefix span {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-right: none;
  border-radius: 6px 0 0 6px;
  background: var(--bg);
  color: var(--muted);
}
.input-prefix input {
  border-radius: 0 6px 6px 0;
}

.grid-2,
.grid-3 {
  display: grid;
  gap: 0 1rem;
}
.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.upload-form {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 700px) {
  main {
    padding: 1rem;
  }
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .table {
    display: block;
    overflow-x: auto;
  }
}