:root {
    --bg: #1e1e1e;
    --bg-sidebar: #252526;
    --fg: #d4d4d4;
    --fg-muted: #9d9d9d;
    --accent: #c5282c;
    --border: #3c3c3c;
    --input-bg: #3c3c3c;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--fg);
    height: 100vh;
    display: flex;
    overflow: hidden;
}
a { color: #58a6ff; text-decoration: none; }
a:hover { text-decoration: underline; }

.sidebar {
    width: 220px;
    background: var(--bg-sidebar);
    padding: 1rem 0.5rem;
    flex-shrink: 0;
    height: 100vh;
    overflow-y: auto;
    transition: width 0.2s ease, padding 0.2s ease;
}
.sidebar nav { display: flex; flex-direction: column; gap: 0.25rem; }
.sidebar nav a {
    color: var(--fg-muted);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
}
.sidebar nav a:hover { color: var(--fg); background: rgba(255,255,255,0.05); }
.sidebar nav a.active { color: var(--accent); }

.sidebar-footer {
    margin-top: 2rem;
    font-size: 0.85rem;
    color: var(--fg-muted);
}

.main {
    flex: 1;
    padding: 1.5rem 2rem;
    overflow: auto;
}
.sidebar-toggle {
    position: fixed;
    top: 10px;
    left: 226px;
    z-index: 1300;
    width: 28px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--input-bg);
    color: var(--fg);
    cursor: pointer;
    line-height: 1;
    font-weight: 600;
    transition: left 0.2s ease;
}
.sidebar-toggle:hover { background: rgba(255, 255, 255, 0.08); }
body.sidebar-collapsed .sidebar {
    width: 0;
    padding: 0;
}
body.sidebar-collapsed .sidebar-toggle {
    left: 8px;
}

h1 { font-size: 1.75rem; margin-top: 0; }
h2 { font-size: 1.2rem; margin: 1.5rem 0 0.5rem; }
.caption { font-size: 0.85rem; color: var(--fg-muted); display: block; margin-top: 0.25rem; }

/* Eval form */
.eval-form label { display: block; margin-top: 1rem; font-weight: 500; }
.eval-form input[type="text"], .eval-form select {
    width: 100%;
    max-width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--fg);
}
.eval-form .exp-buttons { display: flex; gap: 0.5rem; margin-top: 0.5rem; }
.eval-form button {
    padding: 0.5rem 1rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--fg);
    cursor: pointer;
    font-weight: 500;
    transition: background 0.1s ease, border-color 0.1s ease, box-shadow 0.1s ease;
}
.eval-form button:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.08);
    border-color: #555;
}
.eval-form button:active:not(:disabled) {
    background: #2a2a2a;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}
.eval-form button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}
/* .eval-form button.primary { background: var(--accent); border-color: var(--accent); color: #fff; } - Removed to unify button styles */
.eval-form #btn_load { margin-top: 0; }
.load-row {
    margin-top: 1rem;
    display: flex;
    align-items: center;   /* button and loading center aligned */
    gap: 0.75rem;
}
.load-row .btn-test {
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    padding: 0 1rem;
}
.load-indicator {
    display: inline-flex;
    align-items: center;   /* spinner and text center aligned */
    justify-content: center;
    gap: 0.5rem;
    color: var(--fg-muted);
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1;
    height: 38px;          /* same height as button for exact center axis */
    margin: 0;
    transform: none;
}
.load-indicator.hidden { display: none; }
.spinner {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--accent);
    animation: spin 0.8s linear infinite;
    transform: none;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.experiments-list {
    margin-top: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}
.experiments-list .exp-check { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; font-weight: normal; }
.exp-run-info-tooltip {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1200;
    max-width: 95vw;
    max-height: min(420px, 70vh);
    overflow: auto;
    background: rgba(30, 30, 30, 0.35); /* Made significantly more transparent */
    backdrop-filter: blur(8px); /* Slightly increased blur to maintain readability with higher transparency */
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45);
    padding: 0.6rem 0.75rem;
    pointer-events: none;
}
.exp-run-info-tooltip.hidden { display: none; }
.exp-run-info-tooltip .title {
    color: var(--fg);
    font-weight: 600;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.3rem;
}
.exp-run-info-tooltip pre {
    margin: 0;
    white-space: pre;
    color: #d6d6d6;
    font-size: 0.82rem;
    line-height: 1.35;
    font-family: 'Consolas', 'Monaco', monospace;
}

.run-details { margin-top: 2rem; }
.run-details.hidden { display: none; }
.eval-detail-block { margin-top: 0.75rem; }
.eval-detail-block summary { cursor: pointer; color: var(--fg); padding: 0.25rem 0; }

.table-wrap { 
    overflow-x: auto; 
    margin-top: 0.5rem; 
    scrollbar-width: none; /* Firefox */
}
.table-wrap::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Edge */
}

.floating-scrollbar-wrap {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    position: sticky;
    bottom: 0;
    z-index: 10;
}
.floating-scrollbar-wrap::-webkit-scrollbar {
    height: 12px;
}
.floating-scrollbar-wrap::-webkit-scrollbar-track {
    background: var(--bg-sidebar);
}
.floating-scrollbar-wrap::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 6px;
}
.floating-scrollbar-wrap::-webkit-scrollbar-thumb:hover {
    background: var(--fg-muted);
}
.floating-scrollbar-content {
    height: 1px;
}
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.5rem 0.75rem; text-align: center; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
th { color: var(--fg-muted); font-weight: 500; }
#index_table th:first-child,
#index_table td:first-child {
    min-width: 320px;
    white-space: nowrap;
    text-align: left;
}
td.cell-danger {
    background: rgba(255, 92, 92, 0.35);
    color: #ffffff;
}

/* File browser layout */
.browser-layout {
    display: flex;
    height: calc(100vh - 6rem);
    margin-top: 1rem;
}
.browser-tree {
    flex: 0 0 33%;
    min-width: 220px;
    max-width: 60%;
    background: var(--bg-sidebar);
    border-radius: 6px 0 0 6px;
    overflow: auto;
    padding: 0.5rem;
}
.browser-resizer {
    width: 6px;
    flex-shrink: 0;
    background: var(--border);
    cursor: col-resize;
    transition: background 0.15s;
}
.browser-resizer:hover { background: var(--accent); }
.browser-resizer:active { background: var(--accent); }
.browser-content {
    flex: 1;
    min-width: 200px;
    background: var(--bg-sidebar);
    border-radius: 0 6px 6px 0;
    overflow: auto;
    padding: 1rem;
}

/* Windows Explorer-like tree: parent row + children below with indent */
.browser-tree .tree-root { margin-top: 0.25rem; }

.browser-tree .tree-item { display: block; }

.browser-tree .tree-row {
    padding: 2px 6px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.9rem;
    line-height: 1.4;
    cursor: default;
}
.browser-tree .tree-row:hover { background: rgba(255,255,255,0.06); }
.browser-tree .tree-row.selected { background: rgba(197,40,44,0.2); }

.browser-tree .tree-row .expand {
    width: 18px;
    min-width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: var(--fg-muted);
    flex-shrink: 0;
    cursor: pointer;
}
.browser-tree .tree-row .expand:hover { color: var(--fg); }
.browser-tree .tree-row .expand.empty { visibility: hidden; cursor: default; }

.browser-tree .tree-row.folder .expand::before { content: '▶'; }
.browser-tree .tree-item.folder.expanded > .tree-row.folder .expand::before { content: '▼'; }

.browser-tree .tree-row .label {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    cursor: pointer;
}
.download-icon, .share-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--fg-muted);
    opacity: 0;
    transition: opacity 0.15s, color 0.15s;
    text-decoration: none;
    margin-left: 4px;
    padding: 2px;
    cursor: pointer;
    position: relative;
}
.browser-tree .tree-row:hover .download-icon,
.browser-tree .tree-row:hover .share-icon {
    opacity: 1;
}
.download-icon:hover, .share-icon:hover {
    color: var(--accent);
}
.share-tip {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.browser-tree .folder-checkbox {
    width: 14px;
    height: 14px;
    margin: 0 4px 0 0;
    accent-color: var(--accent);
    cursor: pointer;
}

.browser-tree .file-icon {
    width: 20px;
    min-width: 20px;
    height: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
    font-size: 9px;
    font-weight: 700;
    line-height: 1;
    color: #ffffff;
    background: #6b6b6b;
    margin-right: 2px;
    user-select: none;
}
.browser-tree .file-icon-json { background: #7a3ea1; }
.browser-tree .file-icon-md { background: #2b6cb0; }
.browser-tree .file-icon-rs { background: #b45309; }
.browser-tree .file-icon-toml { background: #2f855a; }
.browser-tree .file-icon-file { background: #6b6b6b; }

.browser-tree .tree-children {
    margin-left: 16px; /* indent like Windows */
}
.browser-tree .tree-root.tree-children { margin-left: 0; }

.browser-tree .tree-item.folder > .tree-children { display: none; }
.browser-tree .tree-item.folder.expanded > .tree-children { display: block; }

.browser-tree .tree-empty {
    color: var(--fg-muted);
    font-size: 0.85rem;
    cursor: default;
}

.browser-tree .nav-buttons { display: flex; gap: 0.5rem; margin-bottom: 0.5rem; }
.browser-tree .nav-buttons button {
    padding: 0.35rem 0.6rem;
    font-size: 0.85rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--fg);
    cursor: pointer;
}

.browser-content .placeholder { color: var(--fg-muted); font-size: 0.9rem; }
.browser-content .file-view { font-size: 0.9rem; }
.browser-content .file-view pre { 
    margin: 0; 
    white-space: pre-wrap; 
    overflow-wrap: anywhere;
    word-break: break-word;
    font-family: 'Consolas', 'Monaco', monospace; 
}
.browser-content .file-view pre code { padding: 0; }
.browser-content .json-toggle { margin-bottom: 0.5rem; }
.browser-content .json-toggle summary { cursor: pointer; color: var(--accent); }
.browser-content .error { color: #f14c4c; }

/* JSON tree (expand by level) */
.browser-content .json-tree {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
}
.browser-content .json-details {
    margin: 0.15rem 0;
}
.browser-content .json-summary {
    cursor: pointer;
    list-style: none;
    padding: 2px 6px;
    border-radius: 4px;
    white-space: normal;
    overflow-wrap: anywhere;
    word-break: break-word;
}
.browser-content details > summary::-webkit-details-marker { display: none; }
.browser-content details > summary::marker { content: ""; }
.browser-content .json-summary:hover { background: rgba(255,255,255,0.06); }
.browser-content .json-children {
    margin-left: 16px;
    padding-left: 8px;
    border-left: 1px solid var(--border);
}
.browser-content .json-row {
    padding: 2px 6px;
    border-radius: 4px;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}
.browser-content .json-row:hover { background: rgba(255,255,255,0.04); }
.browser-content .json-key { color: #9cdcfe; }
.browser-content .json-sep { color: var(--fg-muted); }
.browser-content .json-preview { color: var(--fg); }
.browser-content .json-value { color: var(--fg); }
.browser-content .json-key,
.browser-content .json-preview,
.browser-content .json-value {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
}
.browser-content .json-string { color: #ce9178; }
.browser-content .json-number { color: #b5cea8; }
.browser-content .json-boolean { color: #569cd6; }
.browser-content .json-null { color: #569cd6; }
.browser-content .json-note { color: var(--fg-muted); font-style: italic; }

/* Markdown rendered content */
.browser-content .markdown-body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--fg);
}
.browser-content .markdown-body h1, .browser-content .markdown-body h2, .browser-content .markdown-body h3 { margin: 1em 0 0.5em; }
.browser-content .markdown-body h1 { font-size: 1.5em; }
.browser-content .markdown-body h2 { font-size: 1.25em; }
.browser-content .markdown-body h3 { font-size: 1.1em; }
.browser-content .markdown-body p { margin: 0.5em 0; }
.browser-content .markdown-body ul, .browser-content .markdown-body ol { margin: 0.5em 0; padding-left: 1.5em; }
.browser-content .markdown-body code { background: var(--input-bg); padding: 0.2em 0.4em; border-radius: 4px; font-size: 0.9em; }
.browser-content .markdown-body pre { background: var(--input-bg); padding: 1rem; border-radius: 6px; overflow-x: auto; margin: 0.5em 0; }
.browser-content .markdown-body pre code { padding: 0; background: none; }
.browser-content .markdown-body blockquote { border-left: 4px solid var(--border); margin: 0.5em 0; padding-left: 1em; color: var(--fg-muted); }
.browser-content .markdown-body a { color: #58a6ff; }

/* Browser pages: default tree narrower for more content space */
.result-browser .browser-tree { flex: 0 0 28%; }

/* Leader board */
.leaderboard-section { margin-top: 1.5rem; }
.leaderboard-grid {
    margin-top: 0.8rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 0.8rem;
}
.leaderboard-card {
    background: var(--bg-sidebar);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.65rem;
}
.leaderboard-card h3 {
    margin: 0 0 0.5rem 0;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--fg-muted);
}
.leaderboard-canvas-wrap {
    height: 220px;
}

/* ── Shared button style used across all pages ── */
.btn-test {
    padding: 0.5rem 1rem;
    background: #3c3c3c;
    border: 1px solid #3c3c3c;
    border-radius: 4px;
    color: #d4d4d4;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.1s ease, border-color 0.1s ease, box-shadow 0.1s ease;
}
.btn-test:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.08);
    border-color: #555;
}
.btn-test:active:not(:disabled) {
    background: #2a2a2a;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}
.btn-test:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: #2a2a2a;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}