:root {
    --color-bg: #0f1720;
    --color-surface: #1a2532;
    --color-surface-alt: #212f3f;
    --color-border: #2c3b4d;
    --color-text: #e6edf3;
    --color-text-muted: #9aa8b8;
    --color-accent: #3ddc97;
    --color-open: #2ecc71;
    --color-reserve: #f5a623;
    --color-gesloten: #e04f5f;
    --color-search-btn: #2ecc71;
    --color-favorites-btn: #f4c430;
    --color-update-btn: #3498db;
    --radius: 10px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

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

a:hover {
    text-decoration: underline;
}

.site-header {
    padding: 2rem 1.5rem 1rem;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.site-header h1 a {
    color: var(--color-text);
    font-size: 1.8rem;
}

.tagline {
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.site-nav {
    margin-top: 0.75rem;
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.nav-btn {
    display: inline-block;
    padding: 0.55rem 1.4rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: #0f1720;
    transition: filter 0.15s ease, transform 0.1s ease;
}

.nav-btn:hover {
    filter: brightness(1.08);
    text-decoration: none;
}

.nav-btn--search {
    background: var(--color-search-btn);
}

.nav-btn--favorites {
    background: var(--color-favorites-btn);
}

.nav-inline-form {
    display: inline-flex;
    margin: 0;
}

.nav-btn--update {
    background: var(--color-update-btn);
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.nav-btn--update:disabled {
    opacity: 0.5;
    cursor: default;
}

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
}

fieldset {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
}

legend {
    padding: 0 0.5rem;
    color: var(--color-accent);
    font-weight: 600;
}

.field-row {
    margin-bottom: 0.9rem;
}

.field-row-group {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.field-row-group .field-row {
    flex: 1 1 200px;
}

.field-row label {
    display: block;
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.field-row.checkboxes label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-right: 1.5rem;
    color: var(--color-text);
}

.city-input-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    max-width: 320px;
}

.city-input-group input[type="text"] {
    flex: 1 1 auto;
    max-width: none;
}

.favorite-star--inline {
    font-size: 1.3rem;
    padding: 0.1rem 0.2rem;
}

input[type="text"],
input[type="number"],
input[type="date"],
select {
    width: 100%;
    max-width: 320px;
    padding: 0.5rem 0.6rem;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text);
    font-size: 0.95rem;
}

input[type="range"].slider {
    width: 100%;
    max-width: 320px;
    accent-color: var(--color-accent);
    height: 1.6rem;
    cursor: pointer;
    background: transparent;
}

.field-row label span {
    color: var(--color-accent);
    font-weight: 600;
}

.hint {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 0.35rem;
}

button[type="submit"] {
    background: var(--color-accent);
    color: #0f1720;
    border: none;
    padding: 0.7rem 1.6rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
}

button[type="submit"]:hover {
    filter: brightness(1.08);
}

.alert {
    padding: 0.8rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1.25rem;
}

.alert-error {
    background: rgba(224, 79, 95, 0.15);
    border: 1px solid var(--color-gesloten);
    color: #ffb3ba;
}

.results-summary {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.empty-state {
    color: var(--color-text-muted);
    font-style: italic;
}

.tournament-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.tournament-card summary {
    cursor: pointer;
    list-style: none;
}

.tournament-card summary::-webkit-details-marker {
    display: none;
}

.tournament-card summary:hover {
    opacity: 0.92;
}

.tournament-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.favorite-star {
    flex-shrink: 0;
    background: none;
    border: none;
    font-size: 1.6rem;
    line-height: 1;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 0.1rem 0.3rem;
    transition: color 0.15s ease, transform 0.1s ease;
}

.favorite-star:hover {
    color: var(--color-reserve);
    transform: scale(1.1);
}

.favorite-star--active {
    color: var(--color-reserve);
}

.favorite-star:disabled {
    opacity: 0.5;
    cursor: default;
}

.tournament-card h2 {
    margin: 0;
    font-size: 1.15rem;
}

.tournament-meta {
    color: var(--color-text-muted);
    margin: 0.3rem 0 1rem;
    font-size: 0.9rem;
}

.expand-hint {
    display: block;
    margin-top: 0.75rem;
    font-size: 0.78rem;
    color: var(--color-text-muted);
    text-align: right;
}

.tournament-card[open] .expand-hint {
    display: none;
}

.tournament-planning {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--color-border);
}

.series-planning-block {
    margin-bottom: 1.25rem;
}

.series-planning-block:last-child {
    margin-bottom: 0;
}

.series-planning-block h3 {
    margin: 0 0 0.5rem;
    font-size: 0.95rem;
    color: var(--color-accent);
}

.planning-columns {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.planning-column {
    flex: 1 1 220px;
    font-size: 0.85rem;
}

.planning-column strong {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 0.3rem;
}

.planning-column ul {
    margin: 0;
    padding-left: 1.1rem;
}

.status {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.status--open {
    background: rgba(46, 204, 113, 0.15);
    color: var(--color-open);
}

.status--reserve {
    background: rgba(245, 166, 35, 0.15);
    color: var(--color-reserve);
}

.status--gesloten {
    background: rgba(224, 79, 95, 0.15);
    color: var(--color-gesloten);
}

.status--onbekend {
    background: rgba(154, 168, 184, 0.15);
    color: var(--color-text-muted);
}

.series-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.series-table th,
.series-table td {
    text-align: left;
    padding: 0.5rem 0.6rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

.series-table th {
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}