html,
body {
    width: 100%;
    min-height: 100%;
}

body {
    overflow: hidden;
}

.topbar {
    display: grid;
    grid-template-columns: 240px minmax(240px, 1fr) auto;
    align-items: center;
    gap: 18px;
    margin: 8px 8px 0;
    padding: 12px 20px;
    background: var(--panel);
    border: 2px solid var(--border-strong);
}

.logo a,
.navbar a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text);
    text-decoration: none;
}

.logo a {
    font-size: 1.2rem;
    font-weight: 700;
}

.logo-mark,
.window-icon,
.prompt {
    color: var(--accent-text);
}

.navbar a {
    padding: 7px 12px;
    background: var(--panel3);
    border: 1px solid var(--border-strong);
    color: var(--muted-text);
}

.logo a:hover,
.navbar a:hover {
    color: var(--accent-text);
    border-color: var(--muted);
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 14px;
    color: var(--muted-text);
    pointer-events: none;
}

.search-container input {
    width: 100%;
    min-width: 0;
    padding: 10px 92px 10px 40px;
    background: var(--bg);
    border: 2px solid var(--border-strong);
    color: var(--text);
    outline: none;
}

.search-container input:focus {
    border-color: var(--muted);
    box-shadow: 0 0 0 2px oklch(0.34 0.10 303 / 32%);
}

.search-badge {
    position: absolute;
    right: 12px;
    display: flex;
    gap: 4px;
    pointer-events: none;
}

kbd {
    padding: 2px 5px;
    background: var(--panel2);
    border: 1px solid var(--border-strong);
    color: var(--muted-text);
}

.layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 8px;
    height: calc(100vh - 76px);
    padding: 8px;
}

.sidebar,
.challenge-list {
    background: var(--panel);
    border: 2px solid var(--border-strong);
    overflow-y: auto;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding: 16px;
}

.sidebar-box {
    background: var(--bg);
    border: 2px solid var(--border-strong);
}

.section-header {
    padding: 9px 12px;
    background: var(--accent);
    border-bottom: 2px solid var(--border-strong);
    color: var(--accent-text);
    font-weight: 700;
    text-transform: uppercase;
}

.section-body {
    padding: 12px 14px;
}

.filter-list {
    display: grid;
    gap: 8px;
}

.filter-list label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    color: var(--muted-text);
    cursor: pointer;
}

.filter-list label:hover {
    color: var(--text);
}

.filter-list input {
    appearance: none;
    width: 16px;
    height: 16px;
    order: -1;
    background: black;
    border: 2px solid var(--border-strong);
}

.filter-list input:checked {
    background: var(--muted);
    border-color: var(--primary);
    box-shadow: inset 0 0 0 3px black;
}

.count {
    color: var(--muted-text);
}

.vault-stats {
    display: grid;
    gap: 10px;
    color: var(--muted-text);
}

.vault-stats strong {
    display: block;
    color: var(--text);
    font-size: 1.4rem;
}

.challenge-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
    align-items: start;
    gap: 18px;
    padding: 22px;
}

.challenge-window {
    min-width: 0;
    background: var(--panel3);
    border: 2px solid var(--border-strong);
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.challenge-window:hover {
    border-color: var(--muted);
    transform: translateY(-2px);
}

.window-titlebar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 38px;
    padding: 0 10px;
    background: var(--panel2);
    border-bottom: 2px solid var(--border-strong);
    color: var(--muted-text);
    font-weight: 700;
}

.window-title {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
}

.window-title span:last-child {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.window-close {
    display: inline-flex;
    width: 24px;
    height: 24px;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    border: 1px solid black;
    color: var(--accent-text);
    cursor: pointer;
}

.challenge-window:hover .window-titlebar {
    background: var(--accent);
    color: var(--accent-text);
}

.card-body {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 16px;
    padding: 16px;
}

.thumbnail {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    background: var(--bg);
    border: 2px solid var(--border-strong);
    filter: grayscale(0.75);
    transition: filter 0.15s ease, border-color 0.15s ease;
}

.challenge-window:hover .thumbnail,
.thumbnail:hover {
    border-color: var(--muted);
    filter: grayscale(0.1);
}

.challenge-info {
    min-width: 0;
}

.challenge-info h2 {
    margin: 0 0 7px;
    color: var(--text);
    font-size: 1.08rem;
    line-height: 1.25;
}

.challenge-meta-line,
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    color: var(--muted-text);
    font-size: 0.82rem;
    text-transform: uppercase;
}

.challenge-meta-line {
    margin-bottom: 9px;
}

.event-pill,
.tag {
    display: inline-flex;
    align-items: center;
    min-height: 22px;
    padding: 2px 7px;
    background: oklch(0.34 0.10 303 / 35%);
    border: 1px solid var(--border-strong);
    color: var(--text);
}

.challenge-desc {
    margin: 0;
    color: var(--muted-text);
    font-size: 0.9rem;
    line-height: 1.45;
}

.window-footer {
    padding: 10px 16px;
    background: var(--panel);
    border-top: 2px solid var(--border-strong);
}

.run-command {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    text-decoration: none;
}

.run-command:hover {
    color: var(--text);
    text-decoration: underline;
}

.loading-state,
.empty-state,
.error-state {
    grid-column: 1 / -1;
    padding: 22px;
    background: var(--panel3);
    border: 2px solid var(--border-strong);
    color: var(--muted-text);
}

.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
    background: oklch(0 0 0 / 78%);
}

.hidden {
    display: none !important;
}

.modal-window {
    width: min(980px, 96vw);
    max-height: 90vh;
    background: var(--panel);
    border: 2px solid var(--border-strong);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.modal-body {
    display: grid;
    gap: 18px;
    max-height: calc(90vh - 42px);
    padding: 22px;
    overflow-y: auto;
}

.overview {
    display: grid;
    grid-template-columns: minmax(240px, 340px) minmax(0, 1fr);
    gap: 22px;
}

.modal-thumbnail {
    align-self: start;
}

.metadata {
    min-width: 0;
}

.metadata h1 {
    margin: 0 0 16px;
    color: var(--text);
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2rem, 5vw, 3.1rem);
    font-weight: 400;
    line-height: 1.05;
    overflow-wrap: anywhere;
}

.metadata table {
    width: 100%;
    border-collapse: collapse;
}

.metadata td {
    padding: 6px 18px 6px 0;
    color: var(--text);
    vertical-align: top;
}

.metadata td:first-child {
    width: 120px;
    color: var(--muted-text);
}

.panel {
    background: var(--panel3);
    border: 2px solid var(--border-strong);
}

.panel-title {
    padding: 10px 14px;
    background: var(--accent);
    border-bottom: 2px solid var(--border-strong);
    color: var(--accent-text);
    font-weight: 700;
}

.panel-content {
    margin: 0;
    padding: 16px;
    color: var(--muted-text);
    line-height: 1.65;
}

.file-list {
    display: grid;
    gap: 10px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.file-list a,
.file-list span {
    color: var(--text);
    text-decoration: none;
}

.file-list a:hover {
    text-decoration: underline;
}

.file-path {
    display: block;
    margin-top: 3px;
    color: var(--muted-text);
    overflow-wrap: anywhere;
}

.hint-list {
    display: grid;
    gap: 10px;
}

details {
    background: black;
    border: 1px solid var(--border-strong);
}

summary {
    padding: 11px 12px;
    color: var(--text);
    cursor: pointer;
}

details p {
    margin: 0;
    padding: 0 12px 12px;
    color: var(--muted-text);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--panel3);
}

::-webkit-scrollbar-thumb {
    background: var(--muted);
    border: 1px solid var(--border-strong);
}

@media (max-width: 900px) {
    body {
        overflow: auto;
    }

    .topbar,
    .layout,
    .overview {
        grid-template-columns: 1fr;
    }

    .layout {
        height: auto;
    }

    .challenge-list {
        grid-template-columns: 1fr;
        padding: 14px;
    }
}

@media (max-width: 560px) {
    .topbar {
        margin: 0;
        border-left: 0;
        border-right: 0;
    }

    .search-container input {
        padding-right: 40px;
    }

    .search-badge {
        display: none;
    }

    .card-body {
        grid-template-columns: 1fr;
    }

    .card-body .thumbnail {
        width: 100%;
    }
}