:root{--bg: #f5f6fa;--card: #ffffff;--border: #e1e4e8;--text: #1f2430;--muted: #6b7280;--accent: #3b6fed;--accent-dark: #2c56c4;--danger: #e5484d;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 24px;background:var(--card);border-bottom:1px solid var(--border)}.brand{font-weight:700;font-size:1.1rem;color:var(--text);text-decoration:none}.topbar nav{display:flex;align-items:center;gap:16px}.topbar nav a{color:var(--accent);text-decoration:none}.who{color:var(--muted);font-size:.9rem}.badge{background:var(--accent);color:#fff;font-size:.7rem;padding:2px 6px;border-radius:10px;margin-left:6px}main{flex:1;padding:24px;max-width:960px;margin:0 auto;width:100%}.centered{text-align:center;color:var(--muted);padding:40px 0}.auth-card{max-width:380px;margin:60px auto;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:32px}.auth-card h1{margin-top:0;font-size:1.4rem}.auth-card form{display:flex;flex-direction:column;gap:14px}.auth-card label{display:flex;flex-direction:column;gap:6px;font-size:.9rem;color:var(--muted)}.auth-card input{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:1rem}input,button{font-family:inherit}button{cursor:pointer;background:var(--accent);color:#fff;border:none;border-radius:8px;padding:10px 16px;font-size:.95rem}button:hover{background:var(--accent-dark)}button:disabled{opacity:.6;cursor:not-allowed}.link-btn{background:none;color:var(--accent);padding:0;border:none;font-size:inherit}.link-btn:hover{background:none;text-decoration:underline}.link-btn.small{font-size:.8rem;margin-bottom:-4px}.error{color:var(--danger);font-size:.9rem}.breadcrumbs{margin-bottom:16px;color:var(--muted)}.toolbar{display:flex;flex-wrap:wrap;gap:24px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:20px}.upload-form,.new-folder-form{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.progress-bar{width:160px;height:6px;background:var(--border);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:var(--accent);transition:width .2s}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}.empty{color:var(--muted);grid-column:1 / -1}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;padding:4px;gap:4px}.card-main{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;background:none;color:var(--text);padding:16px 8px;text-decoration:none;border-radius:8px;text-align:center}.card-main:hover{background:var(--bg)}.card .icon{font-size:2rem}.card .name{font-size:.85rem;word-break:break-word}.card .meta{font-size:.75rem;color:var(--muted)}.delete-btn{background:none;color:var(--muted);padding:6px;align-self:flex-start}.delete-btn:hover{background:none;color:var(--danger)}.admin section{margin-bottom:32px}.stats-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px}table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--border);border-radius:12px;overflow:hidden}th,td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--border);font-size:.9rem}th{color:var(--muted);font-weight:600;background:var(--bg)}tr:last-child td{border-bottom:none}