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

:root {
    --bg-dark: #1e1e1e;
    --bg-darker: #151515;
    --bg-sidebar: #252526;
    --text-primary: #e0e0e0;
    --text-secondary: #888;
    --accent: #4fc3f7;
    --border: #333;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background: var(--bg-darker);
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.path-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.path-selector select {
    flex: 1;
    max-width: 400px;
    padding: 8px 12px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

.path-selector select:focus {
    outline: none;
    border-color: var(--accent);
}

.path-selector button {
    padding: 8px 20px;
    background: var(--accent);
    color: #000;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
}

.path-selector button:hover {
    opacity: 0.9;
}

/* User Info */
.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-info .avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.user-info .user-name {
    color: var(--text-primary);
    font-size: 14px;
}

.user-info a {
    padding: 6px 12px;
    font-size: 13px;
    text-decoration: none;
    border-radius: 4px;
}

.user-info .admin-link {
    background: #ff9800;
    color: #000;
}

.user-info .logout-link {
    background: var(--bg-sidebar);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.user-info a:hover {
    opacity: 0.8;
}

/* Main */
main {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* Sidebar */
aside {
    width: 250px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    overflow-y: auto;
}

.file-list {
    padding: 10px 0;
}

.file-item {
    padding: 10px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    border-left: 3px solid transparent;
}

.file-item:hover {
    background: rgba(255,255,255,0.05);
}

.file-item.active {
    background: rgba(79, 195, 247, 0.1);
    border-left-color: var(--accent);
}

.hint {
    padding: 20px;
    color: var(--text-secondary);
    font-size: 13px;
}

.hint.error {
    color: #ff5252;
}

/* Content */
article {
    flex: 1;
    overflow-y: auto;
    padding: 30px 50px;
}

.markdown-body {
    max-width: 900px;
    margin: 0 auto;
    line-height: 1.7;
}

.markdown-body h1 { font-size: 2em; margin-bottom: 20px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }
.markdown-body h2 { font-size: 1.5em; margin: 30px 0 15px; }
.markdown-body h3 { font-size: 1.2em; margin: 25px 0 10px; }
.markdown-body p { margin: 15px 0; }
.markdown-body ul, .markdown-body ol { margin: 15px 0; padding-left: 25px; }
.markdown-body li { margin: 5px 0; }
.markdown-body code { background: var(--bg-darker); padding: 2px 6px; border-radius: 3px; font-size: 0.9em; }
.markdown-body pre { background: var(--bg-darker); padding: 15px; border-radius: 6px; overflow-x: auto; margin: 15px 0; }
.markdown-body pre code { background: none; padding: 0; }
.markdown-body table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 10px 15px; text-align: left; }
.markdown-body th { background: var(--bg-darker); }
.markdown-body blockquote { border-left: 4px solid var(--accent); padding-left: 20px; margin: 15px 0; color: var(--text-secondary); }
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 30px 0; }
.markdown-body a { color: var(--accent); text-decoration: none; }
.markdown-body a:hover { text-decoration: underline; }

/* Footer */
footer {
    background: var(--bg-darker);
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
}

footer button {
    padding: 8px 20px;
    background: var(--bg-sidebar);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
}

footer button:hover:not(:disabled) {
    background: var(--border);
}

footer button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

#counter {
    color: var(--text-secondary);
    min-width: 80px;
    text-align: center;
}