:root{--ink: #16202B;--ink-muted: #5A6A78;--ink-subtle: #8A9AA8;--paper: #F6F7F5;--surface: #FFFFFF;--surface-muted: #EFF2EE;--surface-hover: #E8EDE6;--rule: #D8DCD6;--rule-subtle: #E8EBE6;--source: #2F5D50;--source-bg: #EBF3F0;--source-border: #C4DDD4;--locked: #8A6A3B;--locked-bg: #FAF3E8;--locked-border: #E8DCBE;--primary: #1A365D;--primary-hover: #102A43;--primary-light: #EBF3FA;--focus-ring: rgba(47, 93, 80, .4);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", monospace;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(22, 32, 43, .05);--shadow-md: 0 4px 12px rgba(22, 32, 43, .08);--shadow-lg: 0 10px 25px rgba(22, 32, 43, .1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--paper);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh}button,input,textarea,select{font-family:inherit;color:inherit}a{color:inherit;text-decoration:none}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--rule);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--ink-subtle)}.app-container{display:flex;height:100vh;overflow:hidden;background-color:var(--paper)}.sidebar{width:280px;background-color:var(--surface);border-right:1px solid var(--rule);display:flex;flex-direction:column;flex-shrink:0}.main-content{flex:1;display:flex;flex-direction:column;height:100%;overflow:hidden;background-color:var(--paper)}.top-header{height:64px;background-color:var(--surface);border-bottom:1px solid var(--rule);display:flex;align-items:center;justify-content:space-between;padding:0 24px;flex-shrink:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:8px 16px;border-radius:var(--radius-md);font-size:14px;font-weight:500;cursor:pointer;transition:all .15s ease;border:1px solid transparent}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-outline{background-color:var(--surface);border-color:var(--rule);color:var(--ink)}.btn-outline:hover{background-color:var(--surface-muted);border-color:var(--ink-subtle)}.btn-sm{padding:4px 10px;font-size:12px}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:var(--radius-full);font-size:12px;font-weight:500}.badge-source{background-color:var(--source-bg);color:var(--source);border:1px solid var(--source-border)}.badge-locked{background-color:var(--locked-bg);color:var(--locked);border:1px solid var(--locked-border)}.citation-mark{display:inline-flex;align-items:center;justify-content:center;background-color:var(--source-bg);color:var(--source);border:1px solid var(--source-border);font-size:11px;font-weight:600;border-radius:4px;padding:1px 5px;margin:0 3px;vertical-align:baseline;cursor:pointer;text-decoration:none}.citation-mark:hover{background-color:var(--source);color:#fff}