:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#111827;background:#0f172a}*{box-sizing:border-box}body{margin:0;min-height:100vh}button,input{font:inherit}button{cursor:pointer;border:0;border-radius:10px;padding:10px 14px;background:#2563eb;color:#fff;font-weight:700}button:disabled{opacity:.45;cursor:not-allowed}button.secondary{background:#334155}input{border:1px solid #cbd5e1;border-radius:10px;padding:10px 12px}.app-loading,.empty-state{display:grid;place-items:center;height:100vh;color:#fff;font-size:22px}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at top,#1e3a8a,#020617)}.login-card{width:min(420px,100%);background:#fff;border-radius:24px;padding:32px;display:grid;gap:18px;box-shadow:0 24px 80px #0006}.login-card h1{margin:0}.login-card label{display:grid;gap:6px;font-weight:700}.error-box{background:#fee2e2;color:#991b1b;border:1px solid #fecaca;border-radius:10px;padding:10px 12px}.projects-page{min-height:100vh;background:#f8fafc;padding:28px}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.topbar h1{margin:0}.panel{background:#fff;border-radius:18px;padding:20px;margin-bottom:24px;box-shadow:0 10px 30px #0f172a14}.inline-form{display:flex;gap:12px}.inline-form input{flex:1}.project-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}.project-card{text-align:left;background:#fff;color:#0f172a;border:1px solid #e2e8f0;padding:22px;min-height:120px;display:grid;align-content:center;gap:8px;box-shadow:0 8px 20px #0f172a0f}.project-card strong{font-size:20px}.project-card span{color:#64748b}.viewer-shell{display:grid;grid-template-columns:320px 1fr;grid-template-rows:64px 1fr;height:100vh;background:#020617;color:#e5e7eb}.viewer-header{grid-column:1 / -1;display:grid;grid-template-columns:auto auto 1fr auto auto;align-items:center;gap:12px;padding:10px 16px;background:#111827;border-bottom:1px solid #334155}.viewer-header h1{margin:0;text-align:center;font-size:20px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.upload-button{background:#16a34a;color:#fff;border-radius:10px;padding:10px 14px;font-weight:800;cursor:pointer}.upload-button input{display:none}.left-sidebar{overflow:auto;padding:14px;background:#0f172a;border-right:1px solid #334155;display:grid;gap:14px;align-content:start}.viewer-main{overflow:hidden;min-width:0}.tool-panel{background:#111827;border:1px solid #334155;border-radius:16px;padding:14px}.tool-panel h2,.tool-panel h3{margin:0 0 10px}.tool-panel p{color:#cbd5e1}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.tool-grid button{background:#1f2937;display:grid;grid-template-columns:20px 1fr;gap:8px;align-items:center;text-align:left;padding:10px}.tool-grid button.active,.layer-row.active{outline:2px solid #38bdf8}.color-row{display:flex;gap:10px;flex-wrap:wrap}.color{width:34px;height:34px;border-radius:50%;padding:0;border:3px solid transparent}.color.active{border-color:#fff}.range-label{display:grid;gap:8px;margin-top:14px;color:#cbd5e1}.zoom-row{display:flex;align-items:center;justify-content:space-between;gap:8px}.zoom-row .icon-btn{flex-shrink:0}.layer-list{display:grid;gap:8px}.layer-row{display:grid;grid-template-columns:24px 1fr;gap:8px;align-items:center;background:#1f2937;border-radius:10px;padding:6px}.layer-row button{background:transparent;padding:6px;text-align:left;display:flex;gap:8px;align-items:center}.layer-dot{width:14px;height:14px;border-radius:50%;display:inline-block}.new-layer-form{display:grid;grid-template-columns:1fr 44px;gap:8px;margin-top:12px}.download-link{display:inline-block;color:#fff;background:#16a34a;border-radius:10px;padding:10px 14px;font-weight:800;text-decoration:none}.pdf-workspace{height:100%;display:grid;grid-template-rows:54px 1fr}.page-controls{display:flex;align-items:center;justify-content:center;gap:16px;background:#0f172a;border-bottom:1px solid #334155;flex-wrap:wrap;padding:8px 16px}.page-controls .zoom-controls{display:flex;align-items:center;gap:8px;margin-left:auto}.page-controls .zoom-controls strong{min-width:48px;text-align:center}.page-controls .zoom-controls button{padding:8px 12px}.pdf-scroll{overflow:auto;padding:32px;height:100%;position:relative;overscroll-behavior:contain}.pdf-loading{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;color:#94a3b8;font-size:16px}.pdf-page-shell{margin:0 auto;position:relative}.pdf-page{position:relative;background:#fff;box-shadow:0 20px 70px #00000080}.pdf-page canvas{position:absolute;top:0;left:0;display:block;z-index:1}.annotation-stage{position:absolute!important;top:0;left:0;z-index:2;touch-action:none;pointer-events:auto}.page-controls .rotate-controls{display:flex;align-items:center;gap:8px}.tool-select .annotation-stage{cursor:default}.tool-erase .annotation-stage{cursor:cell}.tool-hint{color:#94a3b8;font-size:13px;line-height:1.4;margin:0 0 10px}.annotation-panel-header{display:flex;align-items:center;justify-content:space-between;gap:8px}.annotation-panel-header h2{margin:0}.icon-btn{width:36px;height:36px;padding:0;display:grid;place-items:center;font-size:22px;line-height:1}.annotation-meta-line{color:#94a3b8;font-size:13px;margin:0 0 12px}.annotation-form{display:grid;gap:10px}.annotation-form label{display:grid;gap:6px;font-size:13px;font-weight:700;color:#cbd5e1}.annotation-form textarea{border:1px solid #cbd5e1;border-radius:10px;padding:10px 12px;resize:vertical;font:inherit}.annotation-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:4px}button.danger{background:#dc2626}@media(max-width:900px){.viewer-shell{grid-template-columns:1fr;grid-template-rows:auto auto 1fr}.viewer-header{grid-template-columns:1fr}.left-sidebar{grid-row:2;display:block;max-height:360px}.viewer-main{grid-row:3}}