/* Captain Claw — File Browser */

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    --border: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --green: #3fb950;
    --red: #f85149;
    --yellow: #d29922;
    --orange: #f78166;
    --purple: #bc8cff;
    --radius: 8px;
    --radius-sm: 4px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    --header-height: 48px;
    --sidebar-width: 340px;
}

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

html, body {
    height: 100%;
    overflow: hidden;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
}

/* ─── Header ──────────────────────────────────────────── */

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

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

.fb-header-left h1 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.fb-logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

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

.fb-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    transition: color 0.15s, background 0.15s;
}

.fb-nav-link:hover {
    color: var(--accent);
    background: var(--bg-tertiary);
}

/* ─── Layout ──────────────────────────────────────────── */

.fb-layout {
    display: flex;
    height: calc(100% - var(--header-height));
    overflow: hidden;
}

/* ─── Sidebar ─────────────────────────────────────────── */

.fb-sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.fb-sidebar-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.fb-search {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    font-size: 13px;
    color: var(--text-primary);
    outline: none;
    font-family: var(--font);
}

.fb-search:focus {
    border-color: var(--accent);
}

.fb-search::placeholder {
    color: var(--text-muted);
}

.fb-file-count {
    font-size: 11px;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 2px 8px;
    border-radius: 10px;
    font-family: var(--font-mono);
    flex-shrink: 0;
}

/* ─── File list ───────────────────────────────────────── */

.fb-file-list {
    flex: 1;
    overflow-y: auto;
}

.fb-loading, .fb-list-empty {
    padding: 24px 16px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

.fb-file-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    cursor: pointer;
    transition: background 0.1s;
    border-left: 3px solid transparent;
}

.fb-file-item:hover {
    background: var(--bg-hover);
}

.fb-file-item.selected {
    background: var(--bg-tertiary);
    border-left-color: var(--accent);
}

.fb-file-item.missing {
    opacity: 0.5;
}

.fb-file-icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.fb-file-info {
    flex: 1;
    min-width: 0;
}

.fb-file-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.fb-file-path {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.fb-file-size {
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 1px 8px;
    border-radius: 10px;
    flex-shrink: 0;
}

/* ─── Main area ───────────────────────────────────────── */

.fb-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* ─── Empty / binary / missing states ─────────────────── */

.fb-empty, .fb-binary, .fb-missing {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
}

.fb-empty-icon {
    font-size: 48px;
    opacity: 0.4;
}

.fb-empty-text {
    font-size: 14px;
}

.fb-empty-sub {
    font-size: 12px;
    color: var(--text-muted);
    opacity: 0.7;
    font-family: var(--font-mono);
    max-width: 80%;
    word-break: break-all;
    text-align: center;
}

/* ─── Info bar ────────────────────────────────────────── */

.fb-info-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    gap: 12px;
}

.fb-info-left {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    overflow: hidden;
}

.fb-info-name {
    font-weight: 600;
    font-size: 13px;
    color: var(--accent);
    white-space: nowrap;
}

.fb-info-path {
    font-size: 12px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.fb-info-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.fb-info-meta {
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--font-mono);
    white-space: nowrap;
}

/* ─── Download buttons ────────────────────────────────── */

.fb-view-btn,
.fb-download-btn, .fb-download-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--accent);
    font-size: 12px;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.fb-view-btn:hover,
.fb-download-btn:hover, .fb-download-link:hover {
    background: var(--bg-hover);
    color: var(--accent-hover);
}

/* ─── Text content preview ────────────────────────────── */

.fb-content {
    flex: 1;
    overflow: auto;
}

.fb-code {
    margin: 0;
    padding: 16px 20px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.6;
    white-space: pre;
    overflow-x: auto;
    min-height: 100%;
    tab-size: 4;
}

.fb-code code {
    font-family: inherit;
    background: none;
    padding: 0;
    color: inherit;
}

/* ─── Content loading ─────────────────────────────────── */

.fb-content-loading {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 13px;
}

.fb-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: fb-spin 0.8s linear infinite;
}

@keyframes fb-spin {
    to { transform: rotate(360deg); }
}

/* ─── Toast ───────────────────────────────────────────── */

.fb-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 10px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    color: var(--text-primary);
    z-index: 1001;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.2s, transform 0.2s;
    pointer-events: none;
}

.fb-toast.show {
    opacity: 1;
    transform: translateY(0);
}

.fb-toast.error {
    border-color: var(--red);
}

/* ─── Scrollbar ───────────────────────────────────────── */

.fb-file-list::-webkit-scrollbar,
.fb-content::-webkit-scrollbar {
    width: 6px;
}

.fb-file-list::-webkit-scrollbar-track,
.fb-content::-webkit-scrollbar-track {
    background: transparent;
}

.fb-file-list::-webkit-scrollbar-thumb,
.fb-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* ─── Responsive ──────────────────────────────────────── */

@media (max-width: 768px) {
    .fb-layout {
        flex-direction: column;
    }
    .fb-sidebar {
        width: 100%;
        min-width: unset;
        max-height: 200px;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .fb-info-left {
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }
    .fb-code {
        padding: 12px;
    }
}