@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Inter:wght@400;500;600;700&display=swap');

:root {
    --bg: #ffffff;
    --text: #1a1a2e;
    --text-secondary: #64748b;
    --header-bg: #f8fafc;
    --border: #e2e8f0;
    --accent: #ff9d00;
    --accent-hover: #e68a00;
    --accent-light: rgba(255, 157, 0, 0.08);
    --accent-border: rgba(255, 157, 0, 0.25);
    --panel-bg: #ffffff;
    --folder-color: #ff9d00;
    --file-color: #94a3b8;
    --line-num: #cbd5e1;
    --tree-line: #94a3b8;
    --btn-bg: #f1f5f9;
    --btn-border: #e2e8f0;
    --btn-hover: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.06);
    --shadow-lg: rgba(0, 0, 0, 0.1);
    --model-color: #f59e0b;
    --dataset-color: #10b981;
    --space-color: #6366f1;
    --tag-model: rgba(245, 158, 11, 0.1);
    --tag-dataset: rgba(16, 185, 129, 0.1);
    --tag-space: rgba(99, 102, 241, 0.1);
    --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --radius: 10px;
    --radius-sm: 6px;
}

[data-theme="dark"] {
    --bg: #0f172a;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --header-bg: #1e293b;
    --border: #334155;
    --accent: #fbbf24;
    --accent-hover: #f59e0b;
    --accent-light: rgba(251, 191, 36, 0.08);
    --accent-border: rgba(251, 191, 36, 0.2);
    --panel-bg: #1e293b;
    --folder-color: #fbbf24;
    --file-color: #64748b;
    --line-num: #475569;
    --tree-line: #475569;
    --btn-bg: #1e293b;
    --btn-border: #334155;
    --btn-hover: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
    --tag-model: rgba(251, 191, 36, 0.1);
    --tag-dataset: rgba(16, 185, 129, 0.1);
    --tag-space: rgba(99, 102, 241, 0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    transition: background 0.3s ease, color 0.3s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

button, input, select { font-family: inherit; }
a { text-decoration: none; color: inherit; }

.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 24px 20px 40px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-top: 8px;
}

.brand a {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.brand-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #ff9d00 0%, #ffb340 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    box-shadow: 0 2px 8px rgba(255, 157, 0, 0.3);
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.icon-btn {
    background: var(--btn-bg);
    border: 1px solid var(--btn-border);
    font-size: 1.1rem;
    color: var(--text);
    width: 38px;
    height: 38px;
    cursor: pointer;
    border-radius: var(--radius);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover { background: var(--btn-hover); border-color: var(--accent); }

.text-btn {
    background: var(--btn-bg);
    border: 1px solid var(--btn-border);
    font-size: 0.82rem;
    color: var(--text);
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: var(--radius);
    transition: all 0.2s;
    letter-spacing: -0.01em;
}

.text-btn:hover { border-color: var(--accent); color: var(--accent); }

.sun-icon { display: none !important; }
[data-theme="dark"] .sun-icon { display: inline-block !important; color: #fbbf24; }
[data-theme="dark"] .moon-icon { display: none !important; }
[data-theme="light"] .moon-icon { display: inline-block !important; color: #64748b; }

/* Token Panel */
.token-panel {
    background: var(--header-bg);
    border: 1px solid var(--border);
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    animation: slideDown 0.25s ease-out;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.token-inner {
    display: flex;
    gap: 10px;
    align-items: center;
}

.token-inner i { color: var(--accent); font-size: 0.9rem; }

.token-inner input {
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 9px 14px;
    border-radius: var(--radius-sm);
    flex: 1;
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.82rem;
}

.token-inner input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-border);
}

.token-inner button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.82rem;
    transition: background 0.2s;
}

.token-inner button:hover { background: var(--accent-hover); }

.token-warning {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: 10px 0 0 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.token-warning i { color: #f59e0b; font-size: 0.75rem; }

/* Search */
.search-section {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.type-selector {
    display: flex;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    height: 44px;
}

.type-btn {
    background: var(--btn-bg);
    border: none;
    border-right: 1px solid var(--border);
    padding: 0 16px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 7px;
    transition: all 0.2s;
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.type-btn:last-child { border-right: none; }
.type-btn:hover { background: var(--btn-hover); color: var(--text); }

.type-btn.active-model {
    background: var(--tag-model);
    color: var(--model-color);
}

.type-btn.active-dataset {
    background: var(--tag-dataset);
    color: var(--dataset-color);
}

.type-btn.active-space {
    background: var(--tag-space);
    color: var(--space-color);
}

.input-group {
    background: var(--header-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    padding: 0 14px;
    height: 44px;
    flex: 1;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.input-group:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-border);
}

.prefix {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-right: 4px;
    white-space: nowrap;
    font-family: var(--mono);
    font-weight: 500;
}

input {
    background: transparent;
    border: none;
    color: var(--text);
    width: 100%;
    outline: none;
    font-size: 0.88rem;
    font-family: var(--mono);
    font-weight: 500;
}

.branch-input { max-width: 150px; }

.primary-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0 28px;
    border-radius: var(--radius);
    font-weight: 700;
    cursor: pointer;
    height: 44px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    transition: all 0.2s;
    letter-spacing: -0.01em;
    box-shadow: 0 2px 6px rgba(255, 157, 0, 0.2);
}

.primary-btn:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 12px rgba(255, 157, 0, 0.3);
    transform: translateY(-1px);
}

.primary-btn:disabled { opacity: 0.6; cursor: wait; transform: none; }

/* Status */
#statusMsg {
    padding: 12px 16px;
    margin-bottom: 16px;
    font-size: 0.85rem;
    text-align: center;
    font-weight: 500;
    border-radius: var(--radius);
    letter-spacing: -0.01em;
}

.error {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.15);
}

.loading {
    color: var(--accent);
    background: var(--accent-light);
    border: 1px solid var(--accent-border);
}

/* Empty State */
.empty-state { text-align: center; }

.empty-state h3 {
    font-weight: 600;
    margin-top: 16px;
    letter-spacing: -0.02em;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 0.92rem;
}

.tag-cloud {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    max-width: 850px;
    margin: 0 auto;
}

.repo-tag {
    background: var(--btn-bg);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 16px;
    border-radius: 24px;
    cursor: pointer;
    font-size: 0.8rem;
    font-family: var(--mono);
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.repo-tag:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.tag-type {
    font-size: 0.65rem;
    padding: 2px 7px;
    border-radius: 8px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tag-type.model { background: var(--tag-model); color: var(--model-color); }
.tag-type.dataset { background: var(--tag-dataset); color: var(--dataset-color); }
.tag-type.space { background: var(--tag-space); color: var(--space-color); }

.homepage-section { margin-bottom: 36px; }

.homepage-section h3 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 600;
    margin-bottom: 16px;
}

/* Repo Info */
.repo-info-card {
    background: var(--header-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 20px;
    margin-bottom: 12px;
    display: none;
    animation: slideDown 0.25s ease-out;
}

.repo-info-card.visible { display: block; }

.repo-info-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.repo-info-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.repo-type-badge {
    font-size: 0.68rem;
    padding: 4px 10px;
    border-radius: 8px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.repo-type-badge.model { background: var(--tag-model); color: var(--model-color); }
.repo-type-badge.dataset { background: var(--tag-dataset); color: var(--dataset-color); }
.repo-type-badge.space { background: var(--tag-space); color: var(--space-color); }

.repo-info-name {
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--mono);
    letter-spacing: -0.02em;
}

.repo-info-name a { color: var(--accent); }
.repo-info-name a:hover { text-decoration: underline; }

.repo-info-stats {
    display: flex;
    gap: 18px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.repo-info-stats span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Tree Wrapper */
.tree-wrapper {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    background: var(--panel-bg);
    box-shadow: 0 4px 16px var(--shadow);
    overflow: visible;
    position: relative;
    z-index: 10;
}

.toolbar {
    background: var(--header-bg);
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: var(--radius) var(--radius) 0 0;
}

.tools-group {
    display: flex;
    gap: 8px;
}

.tool-btn {
    background: var(--btn-bg);
    border: 1px solid var(--btn-border);
    color: var(--text);
    padding: 7px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 7px;
    transition: all 0.2s;
    letter-spacing: -0.01em;
}

.tool-btn:hover { background: var(--btn-hover); border-color: var(--tree-line); }

.action-btn {
    color: #fff;
    background: var(--accent);
    border-color: var(--accent);
}

.action-btn:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

/* Dropdowns */
.dropdown { position: relative; }

.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 6px;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 12px 32px var(--shadow-lg);
    z-index: 100;
    min-width: 200px;
    padding: 6px;
    backdrop-filter: blur(10px);
}

.dropdown.active .dropdown-content { display: block; }

.dropdown-content a {
    display: block;
    padding: 10px 14px;
    color: var(--text);
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all 0.15s;
}

.dropdown-content a:hover {
    background: var(--accent);
    color: white;
}

/* Terminal */
.terminal-window {
    background: var(--panel-bg);
    display: flex;
    overflow: auto;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.7;
    border-radius: 0 0 var(--radius) var(--radius);
}

.line-col {
    padding: 16px 12px;
    text-align: right;
    color: var(--line-num);
    border-right: 1px solid var(--border);
    min-width: 48px;
    user-select: none;
    font-size: 0.75rem;
    font-weight: 500;
}

.code-col {
    padding: 16px;
    flex: 1;
    white-space: pre;
}

.tree-line {
    display: flex;
    align-items: center;
    height: 26px;
    border-radius: 4px;
    padding: 0 4px;
}

.tree-line:hover { background: var(--accent-light); }

.t-prefix {
    color: var(--tree-line);
    white-space: pre;
    margin-right: 4px;
}

.t-icon {
    width: 22px;
    text-align: center;
    display: inline-block;
    margin-right: 7px;
    font-size: 0.85rem;
}

.fa-folder { color: var(--folder-color); }
.fa-file { color: var(--file-color); }

.t-name {
    color: var(--text);
    font-weight: 500;
}

.t-name.folder { font-weight: 700; }

.t-size {
    color: var(--text-secondary);
    font-size: 0.72rem;
    margin-left: 12px;
    font-weight: 500;
    opacity: 0.8;
}

.sub-copy {
    opacity: 0;
    margin-left: 8px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 3px;
    font-size: 0.78rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
}

.tree-line:hover .sub-copy { opacity: 1; }
.sub-copy:hover { color: var(--accent); transform: scale(1.15); }

.fa-check { color: #22c55e; }

#lineNumbers div { height: 26px; display: flex; align-items: center; justify-content: flex-end; }

.lfs-badge {
    font-size: 0.6rem;
    padding: 1px 6px;
    border-radius: 4px;
    background: var(--tag-dataset);
    color: var(--dataset-color);
    margin-left: 8px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

/* Tree Search */
.tree-search {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--header-bg);
}

.tree-search input {
    width: 100%;
    padding: 9px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.82rem;
    font-weight: 500;
}

.tree-search input:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 3px var(--accent-border);
}

/* Overlay */
.overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(6px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.overlay.visible { display: flex; }

.overlay-content {
    background: var(--panel-bg);
    padding: 32px;
    border-radius: 16px;
    width: 90%;
    max-width: 480px;
    border: 1px solid var(--border);
    box-shadow: 0 24px 48px var(--shadow-lg);
    position: relative;
    animation: slideUp 0.25s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(12px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.overlay-content h3 {
    margin: 0 0 20px 0;
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.share-box {
    display: flex;
    gap: 10px;
    margin-top: 12px;
}

.share-box input {
    background: var(--header-bg);
    border: 1px solid var(--border);
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.85rem;
    flex: 1;
    font-weight: 500;
}

.share-box button {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: 0 20px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.2s;
}

.share-box button:hover { background: var(--accent-hover); }

.close-btn {
    position: absolute;
    top: 16px; right: 16px;
    background: var(--btn-bg);
    border: 1px solid var(--border);
    width: 32px; height: 32px;
    border-radius: 50%;
    font-size: 1.1rem;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.close-btn:hover { background: var(--btn-hover); color: var(--text); }

/* Footer */
.footer {
    padding: 40px 20px;
    text-align: center;
    font-family: var(--mono);
    font-weight: 500;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: auto;
}

.footer a {
    color: var(--accent);
    font-weight: 600;
    text-decoration: none;
}

.footer a:hover { text-decoration: underline; }

/* Spinner */
.spinner {
    display: inline-block;
    width: 14px; height: 14px;
    border: 2px solid var(--accent-border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { to { opacity: 1; } }

/* Responsive */
@media (max-width: 640px) {
    .search-section { flex-direction: column; }
    .primary-btn { width: 100%; justify-content: center; }
    .branch-input { max-width: 100%; }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 12px;
    }

    .tools-group {
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
    }

    .tools-group.right { justify-content: flex-end; }
    .repo-info-header { flex-direction: column; align-items: flex-start; }

    .type-selector { width: 100%; }
    .type-btn { flex: 1; justify-content: center; padding: 0 10px; }
    .repo-info-stats { flex-wrap: wrap; gap: 10px; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: var(--tree-line); }
::-webkit-scrollbar-track { background: transparent; }

/* Selection */
::selection {
    background: var(--accent);
    color: white;
}